diff --git a/.gitignore b/.gitignore
index 9b9803f3dbdd5a18bb447dd1999657c61d50a05d..a4acaf9a6d2a0ef782d98649f19bdb44c7a4e4d6 100755
--- a/.gitignore
+++ b/.gitignore
@@ -9,4 +9,6 @@ class.pdf
 class.tex
 .idea/
 media/
-node_modules/
\ No newline at end of file
+node_modules/
+latex/
+staticcollect/
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000000000000000000000000000000000000..c899900af00554e5ab4c4f88958f71a6f311a89b
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
+  <component name="NodePackageJsonFileManager">
+    <packageJsonPaths />
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.7 (school-apps)" project-jdk-type="Python SDK" />
+</project>
\ No newline at end of file
diff --git a/schoolapps/aub/migrations/0012_auto_20190410_1416.py b/schoolapps/aub/migrations/0012_auto_20190410_1416.py
new file mode 100644
index 0000000000000000000000000000000000000000..20b7ab28c41f45520c530860f39f2b08b4778a95
--- /dev/null
+++ b/schoolapps/aub/migrations/0012_auto_20190410_1416.py
@@ -0,0 +1,24 @@
+# Generated by Django 2.1.5 on 2019-04-10 12:16
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('aub', '0011_merge_20190318_2004'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='aub',
+            name='created_by',
+            field=models.ForeignKey(default=3, on_delete=models.SET(3), related_name='aubs',
+                                    to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AlterField(
+            model_name='aub',
+            name='status',
+            field=models.ForeignKey(default=5, on_delete=models.SET(5), related_name='aubs', to='aub.Status'),
+        ),
+    ]
diff --git a/schoolapps/aub/migrations/0013_auto_20190411_1203.py b/schoolapps/aub/migrations/0013_auto_20190411_1203.py
new file mode 100644
index 0000000000000000000000000000000000000000..0f4fa642c85fa3f5dde1170c88a912994a57ce55
--- /dev/null
+++ b/schoolapps/aub/migrations/0013_auto_20190411_1203.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.2 on 2019-04-11 10:03
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('aub', '0012_auto_20190410_1416'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='aub',
+            name='status',
+            field=models.ForeignKey(default=1, on_delete=models.SET(1), related_name='aubs', to='aub.Status'),
+        ),
+    ]
diff --git a/schoolapps/aub/migrations/0014_auto_20190502_1708.py b/schoolapps/aub/migrations/0014_auto_20190502_1708.py
new file mode 100644
index 0000000000000000000000000000000000000000..108ff309d2626648b3b9d14dca4f38d3ea22337d
--- /dev/null
+++ b/schoolapps/aub/migrations/0014_auto_20190502_1708.py
@@ -0,0 +1,64 @@
+# Generated by Django 2.2.1 on 2019-05-02 15:08
+
+import datetime
+from django.conf import settings
+from django.db import migrations, models
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('aub', '0013_auto_20190411_1203'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='aub',
+            options={'permissions': (
+                ('apply_for_aub', 'Apply for a AUB'), ('cancel_aub', 'Cancel a AUB'),
+                ('allow1_aub', 'First permission'),
+                ('allow2_aub', 'Second permission'), ('check1_aub', 'Check a AUB'), ('check2_aub', 'Check a AUB'),
+                ('view_archive', 'View AUB archive')), 'verbose_name': 'AUB', 'verbose_name_plural': 'AUBs'},
+        ),
+        migrations.AlterField(
+            model_name='aub',
+            name='created_at',
+            field=models.DateTimeField(default=django.utils.timezone.now, verbose_name='Erstellungszeitpunkt'),
+        ),
+        migrations.AlterField(
+            model_name='aub',
+            name='created_by',
+            field=models.ForeignKey(default=3, on_delete=models.SET(3), related_name='aubs',
+                                    to=settings.AUTH_USER_MODEL, verbose_name='Erstellt von'),
+        ),
+        migrations.AlterField(
+            model_name='aub',
+            name='from_date',
+            field=models.DateField(default=datetime.date.today, verbose_name='Startdatum'),
+        ),
+        migrations.AlterField(
+            model_name='aub',
+            name='from_time',
+            field=models.TimeField(default=django.utils.timezone.now, verbose_name='Startzeit'),
+        ),
+        migrations.AlterField(
+            model_name='aub',
+            name='status',
+            field=models.IntegerField(
+                choices=[(0, 'In Bearbeitung 1'), (1, 'In Bearbeitung 2'), (2, 'Genehmigt'), (3, 'Abgelehnt')],
+                default=0, verbose_name='Status'),
+        ),
+        migrations.AlterField(
+            model_name='aub',
+            name='to_date',
+            field=models.DateField(default=datetime.date.today, verbose_name='Enddatum'),
+        ),
+        migrations.AlterField(
+            model_name='aub',
+            name='to_time',
+            field=models.TimeField(default=django.utils.timezone.now, verbose_name='Endzeit'),
+        ),
+        migrations.DeleteModel(
+            name='Status',
+        ),
+    ]
diff --git a/schoolapps/debug/__init__.py b/schoolapps/debug/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/schoolapps/debug/admin.py b/schoolapps/debug/admin.py
new file mode 100644
index 0000000000000000000000000000000000000000..bb9534da72a30417ee61e3f5cfff774bac9275bd
--- /dev/null
+++ b/schoolapps/debug/admin.py
@@ -0,0 +1,16 @@
+from django.contrib import admin
+
+from .models import DebugLogGroup, DebugLog
+
+
+class DebugLogAdmin(admin.ModelAdmin):
+    readonly_fields = ["id", "group", "return_code", "filename", "updated_at"]
+
+
+class DebugLogGroupAdmin(admin.ModelAdmin):
+    readonly_fields = ["id"]
+
+
+# Register your models here.
+admin.site.register(DebugLogGroup, DebugLogGroupAdmin)
+admin.site.register(DebugLog, DebugLogAdmin)
diff --git a/schoolapps/debug/apps.py b/schoolapps/debug/apps.py
new file mode 100644
index 0000000000000000000000000000000000000000..5c1d0c0a15e96063ee78f411be2bd78e91aada77
--- /dev/null
+++ b/schoolapps/debug/apps.py
@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class DebugConfig(AppConfig):
+    name = 'debug'
diff --git a/schoolapps/debug/migrations/0001_initial.py b/schoolapps/debug/migrations/0001_initial.py
new file mode 100644
index 0000000000000000000000000000000000000000..e6775658862d3397caee389ea94a04ca1dc134b0
--- /dev/null
+++ b/schoolapps/debug/migrations/0001_initial.py
@@ -0,0 +1,47 @@
+# Generated by Django 2.2.1 on 2019-05-23 13:59
+
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='DebugLogGroup',
+            fields=[
+                ('id', models.CharField(max_length=100, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=200, verbose_name='Name')),
+                ('desc_as_pre',
+                 models.CharField(blank=True, max_length=250, verbose_name='Beschreibung, dargestellt als HTML-PRE')),
+            ],
+            options={
+                'verbose_name': 'Debug-Log-Gruppe',
+                'verbose_name_plural': 'Debug-Log-Gruppen',
+            },
+        ),
+        migrations.CreateModel(
+            name='DebugLog',
+            fields=[
+                ('id', models.CharField(max_length=100, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=200, verbose_name='Name')),
+                ('return_code', models.IntegerField(blank=True, null=True, verbose_name='UNIX-Rückgabecode')),
+                ('filename', models.FilePathField(match='.*.log', path='/home/wethjo/dev/school-apps/schoolapps/latex',
+                                                  verbose_name='Dateiname zur Logdatei')),
+                ('updated_at',
+                 models.DateTimeField(default=django.utils.timezone.now, verbose_name='Aktualisierungszeitpunkt')),
+                ('group',
+                 models.ForeignKey(blank=True, default=None, null=True, on_delete=django.db.models.deletion.SET_NULL,
+                                   related_name='logs', to='debug.DebugLogGroup', verbose_name='Gruppe')),
+            ],
+            options={
+                'verbose_name': 'Debug-Log',
+                'verbose_name_plural': 'Debug-Logs',
+            },
+        ),
+    ]
diff --git a/schoolapps/debug/migrations/0002_auto_20190523_1627.py b/schoolapps/debug/migrations/0002_auto_20190523_1627.py
new file mode 100644
index 0000000000000000000000000000000000000000..9db1d9ed1b1d80e6efdc4b16093025c0baaf44ab
--- /dev/null
+++ b/schoolapps/debug/migrations/0002_auto_20190523_1627.py
@@ -0,0 +1,23 @@
+# Generated by Django 2.2.1 on 2019-05-23 14:27
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('debug', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='debuglog',
+            name='log_text',
+            field=models.TextField(blank=True, verbose_name='Log-Text (falls nicht Datei)'),
+        ),
+        migrations.AlterField(
+            model_name='debuglog',
+            name='filename',
+            field=models.FilePathField(blank=True, match='.*.log', path='/home/wethjo/dev/school-apps/schoolapps/latex',
+                                       verbose_name='Dateiname zur Logdatei (falls nicht Log-Text)'),
+        ),
+    ]
diff --git a/schoolapps/debug/migrations/__init__.py b/schoolapps/debug/migrations/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/schoolapps/debug/models.py b/schoolapps/debug/models.py
new file mode 100644
index 0000000000000000000000000000000000000000..831f537a54a336f1f25d7e338dbf3acef75631ba
--- /dev/null
+++ b/schoolapps/debug/models.py
@@ -0,0 +1,138 @@
+import os
+import traceback
+
+from django.db import models
+from django.utils import timezone
+
+from schoolapps.settings import BASE_DIR
+
+
+class DebugLogGroup(models.Model):
+    # Meta
+    id = models.CharField(primary_key=True, blank=False, max_length=100, verbose_name="ID")
+    name = models.CharField(blank=False, max_length=200, verbose_name="Name")
+    desc_as_pre = models.CharField(blank=True, max_length=250, verbose_name="Beschreibung, dargestellt als HTML-PRE")
+
+    class Meta:
+        verbose_name = "Debug-Log-Gruppe"
+        verbose_name_plural = "Debug-Log-Gruppen"
+
+    def __str__(self):
+        return self.name or self.id
+
+    def is_successful(self):
+        """
+        :return: Were all operations in this group successful?
+        """
+        successful = True
+        for log in self.logs.all():
+            if not log.is_successful():
+                successful = False
+        return successful
+
+
+DEBUG_LOG_DIR = os.path.join(BASE_DIR, "latex")
+
+
+class DebugLog(models.Model):
+    # Meta
+    id = models.CharField(primary_key=True, blank=False, max_length=100, verbose_name="ID")
+    name = models.CharField(blank=False, max_length=200, verbose_name="Name")
+    group = models.ForeignKey(DebugLogGroup, on_delete=models.SET_NULL, default=None, null=True, blank=True,
+                              related_name="logs", verbose_name="Gruppe")  # If null, it wouldn't be displayed
+
+    # Data
+    return_code = models.IntegerField(blank=True, null=True, verbose_name="UNIX-Rückgabecode")
+    filename = models.FilePathField(path=DEBUG_LOG_DIR, match=".*.log",
+                                    verbose_name="Dateiname zur Logdatei (falls nicht Log-Text)", blank=True)
+    log_text = models.TextField(verbose_name="Log-Text (falls nicht Datei)", blank=True)
+    updated_at = models.DateTimeField(blank=False, default=timezone.now, verbose_name="Aktualisierungszeitpunkt")
+
+    class Meta:
+        verbose_name = "Debug-Log"
+        verbose_name_plural = "Debug-Logs"
+
+    def __str__(self):
+        return self.name or self.id
+
+    def get_file_content(self):
+        """
+        :return: The log text (file or DB)
+        """
+        if self.filename:
+            print(self.filename)
+            f = open(os.path.join(DEBUG_LOG_DIR, self.filename), "r")
+            content = f.read()
+            f.close()
+            return content
+        elif self.log_text:
+            return self.log_text
+        else:
+            return ""
+
+    def is_successful(self):
+        """
+        :return: Was the last operation successful?
+        """
+        return self.return_code == 0
+
+
+def get_log_group_by_id(id):
+    """
+    Get a log group from DB by given id
+    :param id: ID of log group
+    :return:
+    """
+    p, _ = DebugLogGroup.objects.get_or_create(id=id)
+    return p
+
+
+def register_log_with_filename(id, group_id, filename, return_code):
+    """
+    Register a operation in debugging tool with a log file
+
+    :param id: id of operation
+    :param group_id: id of group
+    :param filename: file path (based on latex dir)
+    :param return_code: UNIX return code
+    """
+    p, _ = DebugLog.objects.get_or_create(id=id)
+    group = get_log_group_by_id(group_id)
+    p.group = group
+    p.return_code = return_code
+    p.filename = filename
+    p.updated_at = timezone.now()
+    p.save()
+
+
+def register_return_0(id, group_id):
+    """
+    Register a operation in debugging tool with an return code of 0 (success) and no log text/log file
+
+    :param id: id of operation
+    :param group_id: id of group
+    """
+    p, _ = DebugLog.objects.get_or_create(id=id)
+    group = get_log_group_by_id(group_id)
+    p.group = group
+    p.return_code = 0
+    p.log_text = ""
+    p.updated_at = timezone.now()
+    p.save()
+
+
+def register_traceback(id, group_id):
+    """
+    Register a operation in debugging tool with an return code of 1 (error) and a log text
+
+    :param id: id of operation
+    :param group_id: id of group
+    """
+    msg = traceback.format_exc()
+    p, _ = DebugLog.objects.get_or_create(id=id)
+    group = get_log_group_by_id(group_id)
+    p.group = group
+    p.return_code = 1
+    p.log_text = msg
+    p.updated_at = timezone.now()
+    p.save()
diff --git a/schoolapps/debug/templates/debug/debug.html b/schoolapps/debug/templates/debug/debug.html
new file mode 100755
index 0000000000000000000000000000000000000000..0f6cbc52608ae4b413088d09fa6f1ccd2b9543cf
--- /dev/null
+++ b/schoolapps/debug/templates/debug/debug.html
@@ -0,0 +1,80 @@
+{% include 'partials/header.html' %}
+{% load material_form %}
+{% load martortags %}
+{% load staticfiles %}
+<link rel="stylesheet" href="{% static "css/highlight.min.css" %}">
+<script src="{% static "js/highlight.min.js" %}"></script>
+<script>hljs.initHighlightingOnLoad();</script>
+
+<style>
+    .debug-li {
+        line-height: 2;
+    }
+
+    .debug-icon {
+        font-size: 2.5rem;
+    }
+</style>
+
+<main>
+    <a class="btn-flat waves-effect waves-teal right btn-flat-medium" href="{% url "debug_logs" %}"><i
+            class="material-icons refresh center">refresh</i></a>
+
+    <h4>Debuggingtool</h4>
+
+
+    <h5>Schnellüberblick</h5>
+    <div class="row">
+        {% for group in groups %}
+            <div class="col s12 m4">
+                <div class="card">
+                    <div class="card-content">
+                        <i class="material-icons right {{ group.is_successful|yesno:"green,red" }}-text debug-icon">{{ group.is_successful|yesno:"check_circle,error" }}</i>
+                        <span class="card-title">{{ group.name }}</span>
+                        <ul>
+                            {% for log in group.logs.all %}
+                                <li class="debug-li">
+                                    <i class="material-icons right {{ log.is_successful|yesno:"green,red" }}-text">{{ log.is_successful|yesno:"check_circle,error" }}</i>
+                                    {{ log.name }}
+                                </li>
+                            {% endfor %}
+                        </ul>
+                    </div>
+                    <div class="card-action">
+                        <a href="#{{ group.id }}">
+                            Log anzeigen
+                        </a>
+                    </div>
+                </div>
+
+            </div>
+        {% endfor %}
+    </div>
+
+
+    <h5>Logs</h5>
+    {% for group in groups %}
+        <div class="card" id="{{ group.id }}">
+            <div class="card-content">
+                <i class="material-icons right {{ group.is_successful|yesno:"green,red" }}-text medium">{{ group.is_successful|yesno:"check_circle,error" }}</i>
+                <span class="card-title">{{ group.name }}</span>
+                <pre>{{ group.desc_as_pre|default:" " }}</pre>
+                {% for log in group.logs.all %}
+                    <div>
+                        <i class="material-icons right {{ log.is_successful|yesno:"green,red" }}-text small">{{ log.is_successful|yesno:"check_circle,error" }}</i>
+
+                        <h5>{{ log.name }} </h5>
+                        <p><i class="material-icons left">access_time</i> {{ log.updated_at }}</p>
+                        <pre><code class="plaintext scroll-fix">RETURN CODE: {{ log.return_code }}
+
+{{ log.get_file_content }}
+                    </code></pre>
+                    </div>
+                {% endfor %}
+            </div>
+        </div>
+    {% endfor %}
+
+</main>
+
+{% include 'partials/footer.html' %}
diff --git a/schoolapps/debug/tests.py b/schoolapps/debug/tests.py
new file mode 100644
index 0000000000000000000000000000000000000000..7ce503c2dd97ba78597f6ff6e4393132753573f6
--- /dev/null
+++ b/schoolapps/debug/tests.py
@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.
diff --git a/schoolapps/debug/urls.py b/schoolapps/debug/urls.py
new file mode 100644
index 0000000000000000000000000000000000000000..ee68b8411b7aaece1a9194a0fd7c48e6fa17172b
--- /dev/null
+++ b/schoolapps/debug/urls.py
@@ -0,0 +1,8 @@
+from django.urls import path
+
+from . import views
+
+urlpatterns = [
+    path("", views.debugging_tool),
+    path("logs/", views.debugging_tool, name="debug_logs")
+]
diff --git a/schoolapps/debug/views.py b/schoolapps/debug/views.py
new file mode 100644
index 0000000000000000000000000000000000000000..95e756c6cf9d9be4c8c88d670928fba56b60c009
--- /dev/null
+++ b/schoolapps/debug/views.py
@@ -0,0 +1,11 @@
+from django.contrib.auth.decorators import login_required
+from django.shortcuts import render
+
+from debug.models import DebugLogGroup
+
+
+@login_required
+# @permission_required("timetable.")
+def debugging_tool(request):
+    groups = DebugLogGroup.objects.all()
+    return render(request, "debug/debug.html", {"groups": groups})
diff --git a/schoolapps/schoolapps/settings.py b/schoolapps/schoolapps/settings.py
index 5fa398d6314a9baf8d135e2f2fb7072319d2b60f..1c1fdf06722d84cb7f75f9c402164e398295c961 100755
--- a/schoolapps/schoolapps/settings.py
+++ b/schoolapps/schoolapps/settings.py
@@ -41,6 +41,7 @@ ALLOWED_HOSTS = [
 INSTALLED_APPS = [
     'django_pdb',
     'dashboard.apps.DashboardConfig',
+    "debug.apps.DebugConfig",
     'aub.apps.AubConfig',
     'untisconnect.apps.UntisconnectConfig',
     'timetable.apps.TimetableConfig',
@@ -56,6 +57,7 @@ INSTALLED_APPS = [
     'django.contrib.staticfiles',
     'material',
     'django_react_templatetags',
+    'martor',
     'widget_tweaks',
 ]
 
@@ -150,6 +152,7 @@ USE_TZ = True
 # https://docs.djangoproject.com/en/2.0/howto/static-files/
 
 STATIC_URL = '/static/'
+STATIC_ROOT = os.path.join(BASE_DIR, "staticcollect")
 
 # Redirect to home URL after login (Default redirects to /accounts/profile/)
 LOGIN_REDIRECT_URL = '/'
@@ -232,3 +235,5 @@ logger.setLevel(logging.DEBUG)
 # Media
 MEDIA_URL = '/media/'
 MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
+
+DBSETTINGS_USE_CACHE = False
diff --git a/schoolapps/schoolapps/urls.py b/schoolapps/schoolapps/urls.py
index 5dc580f2f395928e8ba8ea4200699cfd0b29e3ea..ae826621f5717ddd8499e26e1dee4da287139f5d 100755
--- a/schoolapps/schoolapps/urls.py
+++ b/schoolapps/schoolapps/urls.py
@@ -62,6 +62,7 @@ urlpatterns = [
     #########
     # Admin #
     #########
+    path("debug/", include("debug.urls")),
     path('settings/', include('dbsettings.urls')),
     path('admin/', admin.site.urls),
 
@@ -75,7 +76,9 @@ urlpatterns = [
     #######
     path('faq/', include('faq.urls')),
 
-    path("pwabuilder-sw.js", serviceworker)
+    path("pwabuilder-sw.js", serviceworker),
+
+    path('martor/', include('martor.urls')),
 ]
 
 urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)
diff --git a/schoolapps/static/common/helper.js b/schoolapps/static/common/helper.js
index f182e72ffcf09a69f7de63515703c7186cb906fa..116614cceb4ee54de0c3483639bb12fb07f72966 100644
--- a/schoolapps/static/common/helper.js
+++ b/schoolapps/static/common/helper.js
@@ -102,9 +102,16 @@ $(document).ready(function () {
         window.print();
     });
 
-    //Initialize Collapsible [MAT]
+    // Initialize Collapsible [MAT]
     $('.collapsible').collapsible();
 
-    //Initialize FABs [MAT]
+    // Initialize FABs [MAT]
     $('.fixed-action-btn').floatingActionButton();
+
+    // Initialize delete button
+    $(".delete-button").click(function (e) {
+        if (!confirm("Wirklich löschen?")) {
+            e.preventDefault();
+        }
+    })
 });
\ No newline at end of file
diff --git a/schoolapps/static/common/style.css b/schoolapps/static/common/style.css
index eda1ba48a9fb688485466bac9a9585be0b9fb496..e05205376fb3df6d45e35c98922b189401016661 100755
--- a/schoolapps/static/common/style.css
+++ b/schoolapps/static/common/style.css
@@ -12,7 +12,7 @@ body {
     background-color: #da1f3d !important;
 }
 
-.primary-color-text {
+.primary-color-text, .primary-color-text a {
     color: #da1f3d !important;
 }
 
@@ -103,22 +103,14 @@ span.badge.new {
     height: 26px;
 }
 
-span.badge.no-float {
+span.badge.new.no-float {
     float: none;
+    padding: 3px 6px;
 }
-/*span.badge {*/
-/*width: 9em;*/
-/*line-height: 4ex;*/
-/*height: 4ex;*/
-/*}*/
-/*span.badge::after {*/
-/*content: "";*/
-/*}*/
 
-/*span.item-text {*/
-/*line-height: 4ex;*/
-/*vertical-align: bottom;*/
-/*}*/
+span.badge .material-icons {
+    font-size: 0.9rem;
+}
 
 /*+++++++++++*/
 /* Timetable */
@@ -166,23 +158,23 @@ span.badge.no-float {
     width: 100%;
 }
 
-.timetable-mobile-title-card{
+.timetable-mobile-title-card {
     margin-top: 50px;
     margin-bottom: .60rem;
 }
 
-.timetable-mobile-title-card:first-child{
+.timetable-mobile-title-card:first-child {
     margin-top: -10px;
     margin-bottom: .60rem;
 }
 
-.timetable-mobile-title-card .card-content{
+.timetable-mobile-title-card .card-content {
     padding: 10px;
     text-align: center;
     width: 100%;
 }
 
-.timetable-mobile-title-card .card-content .card-title{
+.timetable-mobile-title-card .card-content .card-title {
     font-weight: bold;
 }
 
@@ -199,7 +191,7 @@ table.substitutions td, table.substitutions th {
     margin: 0;
 }
 
-.lesson-card a {
+.lesson-card a, .substitutions a {
     color: black;
 }
 
@@ -235,7 +227,11 @@ table.substitutions td, table.substitutions th {
 }
 
 .no-margin {
-    margin: 0;
+    margin: 0 !important;
+    margin-left: 0 !important;
+    margin-right: 0 !important;
+    margin-top: 0 !important;
+    margin-bottom: 0 !important;
 }
 
 /* Table*/
@@ -306,26 +302,36 @@ table.striped > tbody > tr:nth-child(odd) {
     }
 }
 
-.alert p {
+.alert ul, .alert p {
+    margin: 0;
+}
+
+.alert p:first-child, .alert div:first-child {
     margin: 10px;
     padding: 10px;
     border-left: 5px solid;
 }
 
-.alert.success p {
+.alert.success p, .alert.success div {
     background-color: #c5e1a5;
     border-color: #4caf50;
 }
 
-.alert.error p {
+.alert.error p, .alert.error div {
     background-color: #ef9a9a;
     border-color: #b71c1c;
 }
 
-main .alert p {
+.alert.primary p, .alert.primary div {
+    background-color: #eca4af;
+    border-color: #da1f3d;
+}
+
+main .alert p:first-child, main .alert div:first-child {
     margin-left: -10px;
     margin-right: -10px;
 }
+
 .btn, .btn-large, .btn-small {
     background-color: #282E3F;
 }
@@ -349,52 +355,92 @@ FEEDBACK
 }
 
 @media only screen and (max-width: 992px) {
-    .rating{
+    .rating {
         margin-top: 12px;
         min-height: 40px;
         justify-content: space-around;
     }
+
+    ´
 }
 
 .rating label {
-  display: flex;
-  flex: 1;
-  position: relative;
-  cursor: pointer;
+    display: flex;
+    flex: 1;
+    position: relative;
+    cursor: pointer;
 }
+
 .rating label:after {
-  font-family: 'Material Icons';
-  -webkit-font-feature-settings: 'liga';
-  position: absolute;
-  color: #777;
-  top: 0;
-  left: 0;
-  width: 100%;
-  height: 100%;
-  text-align: center;
-  font-size: 40px;
-  content: 'star_border';
+    font-family: 'Material Icons';
+    -webkit-font-feature-settings: 'liga';
+    position: absolute;
+    color: #777;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    text-align: center;
+    font-size: 40px;
+    content: 'star_border';
 }
+
 .rating input {
-  display: none!important;
+    display: none !important;
 }
+
 .rating > input:checked + label:after,
 .rating > input:checked ~ label:after {
-  content: "star";
-  color: #FFD700;
+    content: "star";
+    color: #FFD700;
 }
+
 .rating > input:hover + label:after,
 .rating > input:hover ~ label:after {
-  content: "star";
-  color: #FFD700;
+    content: "star";
+    color: #FFD700;
 }
 
 .support-input-mobile label {
-  line-height: 1rem;
+    line-height: 1rem;
+}
+
+.span-info {
+    width: 24px;
+    vertical-align: middle;
+}
+
+i.collapsible-trigger {
+    margin-right: -10px;
+
+}
+
+.collapsible .collapsible-trigger::before {
+    content: 'arrow_downward';
+}
+
+.collapsible .collapsible-trigger.v2::before {
+    content: 'more_vert';
+}
+
+.collapsible .active .collapsible-trigger::before {
+    content: 'arrow_upward';
+}
+
+
+.scroll-fix {
+    max-height: 300px;
+    overflow: scroll;
+}
+
+.waves-effect.waves-katharineum .waves-ripple {
+    background-color: rgba(218, 31, 61, 0.65);
 }
 
-.span-info{
-  width: 24px;
-  vertical-align: middle;
+.card .card-action a:not(.btn):not(.btn-large):not(.btn-small):not(.btn-large):not(.btn-floating) {
+    color: #da1f3d;
 }
 
+.card .card-action a:not(.btn):not(.btn-large):not(.btn-small):not(.btn-large):not(.btn-floating):hover {
+    color: #ea4661;
+}
\ No newline at end of file
diff --git a/schoolapps/static/css/highlight.min.css b/schoolapps/static/css/highlight.min.css
new file mode 100644
index 0000000000000000000000000000000000000000..2b8ac2cf92247093c2800a3baa849f3c2ef17ae3
--- /dev/null
+++ b/schoolapps/static/css/highlight.min.css
@@ -0,0 +1 @@
+.hljs{display:block;overflow-x:auto;padding:.5em;background:#F0F0F0}.hljs,.hljs-subst{color:#444}.hljs-comment{color:#888888}.hljs-keyword,.hljs-attribute,.hljs-selector-tag,.hljs-meta-keyword,.hljs-doctag,.hljs-name{font-weight:bold}.hljs-type,.hljs-string,.hljs-number,.hljs-selector-id,.hljs-selector-class,.hljs-quote,.hljs-template-tag,.hljs-deletion{color:#880000}.hljs-title,.hljs-section{color:#880000;font-weight:bold}.hljs-regexp,.hljs-symbol,.hljs-variable,.hljs-template-variable,.hljs-link,.hljs-selector-attr,.hljs-selector-pseudo{color:#BC6060}.hljs-literal{color:#78A960}.hljs-built_in,.hljs-bullet,.hljs-code,.hljs-addition{color:#397300}.hljs-meta{color:#1f7199}.hljs-meta-string{color:#4d99bf}.hljs-emphasis{font-style:italic}.hljs-strong{font-weight:bold}
\ No newline at end of file
diff --git a/schoolapps/static/js/highlight.min.js b/schoolapps/static/js/highlight.min.js
new file mode 100644
index 0000000000000000000000000000000000000000..1f06ffc1c6b68df21193a54fe8d26312403b96ef
--- /dev/null
+++ b/schoolapps/static/js/highlight.min.js
@@ -0,0 +1,2 @@
+/*! highlight.js v9.15.6 | BSD3 License | git.io/hljslicense */
+!function(e){var t="object"==typeof window&&window||"object"==typeof self&&self;"undefined"!=typeof exports?e(exports):t&&(t.hljs=e({}),"function"==typeof define&&define.amd&&define([],function(){return t.hljs}))}(function(n){var 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new file mode 100644
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diff --git a/schoolapps/templates/martor/editor.html b/schoolapps/templates/martor/editor.html
new file mode 100644
index 0000000000000000000000000000000000000000..dccea1c07d93851a03392b1fef97228098912b9e
--- /dev/null
+++ b/schoolapps/templates/martor/editor.html
@@ -0,0 +1,71 @@
+{% load i18n %}
+<div class="main-martor main-martor-{{ field_name }} card" data-field-name="{{ field_name }}">
+    <div class="section-martor card-content">
+        <div class="row">
+            <ul class="tabs col s12 m3 primary-color-text">
+                <li class="tab">
+                    <a class="item" data-tab="editor-tab-{{ field_name }}" href="#editor-{{ field_name }}">
+                        <i class="material-icons">edit</i>
+                        {#                        {% trans "Editor" %}#}
+                    </a>
+                </li>
+                <li class="tab">
+                    <a class="item" data-tab="preview-tab-{{ field_name }}" href="#preview-{{ field_name }}">
+                        <i class="material-icons">slideshow</i>
+                        {#                        {% trans "Preview" %}#}
+                    </a>
+                </li>
+
+            </ul>
+            <div class="col s12 m9">
+                {% include "martor/toolbar.html" %}
+            </div>
+        </div>
+        <div class="col s12 tab segment" data-tab="editor-tab-{{ field_name }}"
+             id="editor-{{ field_name }}">
+            <div class="ui active dimmer upload-progress" style="display:none">
+                <div class="ui text loader">{% trans "Uploading... please wait..." %}</div>
+            </div>
+
+            <div id="martor-{{ field_name }}" class="martor-field martor-field-{{ field_name }}"></div>
+            {{ martor }}
+            <i class="angle double down grey icon expand-editor"></i>
+        </div>
+        <div class="martor-preview col s12 tab segment" data-tab="preview-tab-{{ field_name }}"
+             id="preview-{{ field_name }}">
+            <p>{% trans "Nothing to preview" %}</p>
+        </div>
+    </div><!-- end  /.section-martor -->
+
+    {% include 'martor/guide.html' %}
+    {% include 'martor/emoji.html' %}
+    <script type="text/javascript">
+        $(document).ready(function () {
+            $('.tabs').tabs();
+            $('.dropdown-trigger').dropdown();
+            $('.modal').modal();
+        });
+    </script>
+    <style type="text/css">
+        .main-martor .card-content {
+            margin: 0;
+            padding: 0;
+        }
+
+        .martor-toolbar .btn-flat {
+            padding: 0 6px;
+        }
+
+        .maximize::before {
+            content: "fullscreen";
+        }
+
+        .minimize::before {
+            content: "fullscreen_exit";
+        }
+
+        .main-martor .tab a i {
+            line-height: inherit;
+        }
+    </style>
+</div>
diff --git a/schoolapps/templates/martor/emoji.html b/schoolapps/templates/martor/emoji.html
new file mode 100644
index 0000000000000000000000000000000000000000..61bc0a1843efa512bc15147b786d21e94758b2a5
--- /dev/null
+++ b/schoolapps/templates/martor/emoji.html
@@ -0,0 +1,14 @@
+{% load i18n %}
+<div class="ui large modal scrolling transition modal-emoji">
+    <i class="close icon"></i>
+    <div class="header"><i class="help circle icon"></i> {% trans "Select Emoji to Insert" %}</div>
+    <div class="content emoji-content-base">
+        <div class="ui segment emoji-loader-init">
+            <div class="ui active inverted dimmer">
+                <div class="ui text loader">{% trans "Preparing emojis..." %}</div>
+            </div>
+        </div>
+        <div class="ui grid emoji-content-body">
+        </div>
+    </div>
+</div>
diff --git a/schoolapps/templates/martor/guide.html b/schoolapps/templates/martor/guide.html
new file mode 100644
index 0000000000000000000000000000000000000000..60d35b70403144b39a63df6b4d7ee084cc844268
--- /dev/null
+++ b/schoolapps/templates/martor/guide.html
@@ -0,0 +1,176 @@
+{% load i18n static %}
+<div class="ui medium modal scrolling transition modal-help-guide modal" id="modal-{{ field_name }}">
+    {#  <i class="close icon"></i>#}
+
+    <div class="modal-content">
+        <a href="#" class="modal-close btn-flat right"><i class="material-icons">close</i></a>
+
+        <h4><i class="help circle icon"></i> {% trans "Markdown Guide" %}</h4>
+        <p>{% blocktrans with doc_url='http://commonmark.org/help/' %}This site is powered by Markdown. For full
+            documentation,
+            <a href="{{ doc_url }}" target="_blank">click here</a>{% endblocktrans %}</p>
+        <table class="ui celled table markdown-reference">
+            <thead>
+            <tr>
+                <th>{% trans "Code" %}</th>
+                <th>{% trans "Or" %}</th>
+                <th>Linux/Windows</th>
+                <th>Mac OS</th>
+                <th>{% trans "... to Get" %}</th>
+            </tr>
+            </thead>
+            <tbody>
+            {#            <tr>#}
+            {#                <td>:emoji_name:</td>#}
+            {#                <td>&mdash;</td>#}
+            {#                <td>&mdash;</td>#}
+            {#                <td>&mdash;</td>#}
+            {#                <td><img class="marked-emoji" src="{% static 'plugins/images/heart.png' %}"></td>#}
+            {#            </tr>#}
+            {#            <tr>#}
+            {#                <td>@[username]</td>#}
+            {#                <td>&mdash;</td>#}
+            {#                <td>Ctrl+M</td>#}
+            {#                <td>Command+M</td>#}
+            {#                <td><a href="#">@username</a></td>#}
+            {#            </tr>#}
+            {#            <tr>#}
+            {#                <td colspan="5"></td>#}
+            {#            </tr>#}
+            <tr>
+                <td>*Italic*</td>
+                <td>_Italic_</td>
+                <td>Ctrl+I</td>
+                <td>Command+I</td>
+                <td><em>Italic</em></td>
+            </tr>
+            <tr>
+                <td>**Bold**</td>
+                <td>__Bold__</td>
+                <td>Ctrl+B</td>
+                <td>Command+B</td>
+                <td><strong>Bold</strong></td>
+            </tr>
+            <tr>
+                <td>++Underscores++</td>
+                <td>&mdash;</td>
+                <td>Shift+U</td>
+                <td>Option+U</td>
+                <td>
+                    <ins>Underscores</ins>
+                </td>
+            </tr>
+            <tr>
+                <td>~~Strikethrough~~</td>
+                <td>&mdash;</td>
+                <td>Shift+S</td>
+                <td>Option+S</td>
+                <td>
+                    <del>Strikethrough</del>
+                </td>
+            </tr>
+            <tr>
+                <td># Heading 1</td>
+                <td>Heading 1<br> =========</td>
+                <td>Ctrl+Alt+1</td>
+                <td>Command+Option+1</td>
+                <td><h1>Heading 1</h1></td>
+            </tr>
+            <tr>
+                <td>## Heading 2</td>
+                <td>Heading 2<br> -----------</td>
+                <td>Ctrl+Alt+2</td>
+                <td>Command+Option+2</td>
+                <td><h2>Heading 2</h2></td>
+            </tr>
+            <tr>
+                <td>[Link](http://a.com)</td>
+                <td>[Link][1]<br> &#8285;<br> [1]: http://b.org</td>
+                <td>Ctrl+L</td>
+                <td>Command+L</td>
+                <td>
+                    <a href="http://commonmark.org/">Link</a>
+                </td>
+            </tr>
+            {#            <tr>#}
+            {#                <td>![Image](http://url/a.png)</td>#}
+            {#                <td>![Image][1]<br> &#8285;<br> [1]: http://url/b.jpg</td>#}
+            {#                <td>Ctrl+Shift+I</td>#}
+            {#                <td>Command+Option+I</td>#}
+            {#                <td><img src="{% static 'plugins/images/commonmark.png' %}" width="36" height="36" alt="Markdown"></td>#}
+            {#            </tr>#}
+            <tr>
+                <td>&gt; Blockquote</td>
+                <td>&mdash;</td>
+                <td>Ctrl+Q</td>
+                <td>Command+Q</td>
+                <td>
+                    <blockquote>Blockquote</blockquote>
+                </td>
+            </tr>
+            <tr>
+                <td>A paragraph.<br><br> A paragraph after 1 blank line.</td>
+                <td>&mdash;</td>
+                <td>&mdash;</td>
+                <td>&mdash;</td>
+                <td><p>A paragraph.</p>
+                    <p>A paragraph after 1 blank line.</p></td>
+            </tr>
+            <tr>
+                <td><p>* List<br> * List<br> * List</p></td>
+                <td><p> - List<br> - List<br> - List<br></p></td>
+                <td>Ctrl+U</td>
+                <td>Command+U</td>
+                <td>
+                    <ul>
+                        <li>List</li>
+                        <li>List</li>
+                        <li>List</li>
+                    </ul>
+                </td>
+            </tr>
+            <tr>
+                <td><p> 1. One<br> 2. Two<br> 3. Three</p></td>
+                <td><p> 1) One<br> 2) Two<br> 3) Three</p></td>
+                <td>Ctrl+Shift+O</td>
+                <td>Command+Option+O</td>
+                <td>
+                    <ol>
+                        <li>One</li>
+                        <li>Two</li>
+                        <li>Three</li>
+                    </ol>
+                </td>
+            </tr>
+            <tr>
+                <td>Horizontal Rule<br><br> -----------</td>
+                <td>Horizontal Rule<br><br> ***********</td>
+                <td>Ctrl+H</td>
+                <td>Command+H</td>
+                <td>Horizontal Rule
+                    <hr>
+                </td>
+            </tr>
+            <tr>
+                <td>`Inline code` with backticks</td>
+                <td>&mdash;</td>
+                <td>Ctrl+Alt+C</td>
+                <td>Command+Option+C</td>
+                <td><code>Inline code</code> with backticks</td>
+            </tr>
+            <tr>
+                <td>```<br> def whatever(foo):<br>&nbsp;&nbsp;&nbsp;&nbsp;return foo<br>```</td>
+                <td><b>with tab / 4 spaces</b><br>....def whatever(foo):<br>....&nbsp;&nbsp;&nbsp;&nbsp;return foo</td>
+                <td>Ctrl+Alt+P</td>
+                <td>Command+Option+P</td>
+                <td>
+                    <pre>def whatever(foo):<br/>    return foo</pre>
+                </td>
+            </tr>
+            </tbody>
+        </table>
+    </div>
+    <div class="modal-footer">
+        <a href="#" class="modal-close waves-effect waves-green btn-flat">Close</a>
+    </div>
+</div>
diff --git a/schoolapps/templates/martor/toolbar.html b/schoolapps/templates/martor/toolbar.html
new file mode 100644
index 0000000000000000000000000000000000000000..a49bc5d517f0b6da602699288d5f7a45d972911b
--- /dev/null
+++ b/schoolapps/templates/martor/toolbar.html
@@ -0,0 +1,90 @@
+{% load i18n %}
+<div class="ui right floated item martor-toolbar">
+    <a class="markdown-selector btn-flat markdown-bold" title="{% trans 'Bold' %} (Ctrl+B)">
+        <i class="material-icons">format_bold</i>
+    </a>
+    <a class="markdown-selector btn-flat markdown-italic" title="{% trans 'Italic' %} (Ctrl+I)">
+        <i class="material-icons">format_italic</i>
+    </a>
+    <a class="markdown-selector btn-flat markdown-horizontal"
+       title="{% trans 'Horizontal Line' %} (Ctrl+H)">
+        <i class="material-icons">remove</i>
+    </a>
+
+
+    <a class="dropdown-trigger btn-flat" title="{% trans 'Heading' %}" data-target="dropdown-heading-{{ field_name }}">
+        <i class="material-icons">format_size</i>
+    </a>
+    <ul class="dropdown-content" id="dropdown-heading-{{ field_name }}">
+        <li>
+            <a class=" markdown-selector markdown-h1" title="{% trans 'H' %} 1 (Ctrl+Alt+1)">{% trans 'H' %} 1</a>
+        </li>
+        <li>
+            <a class=" markdown-selector markdown-h2" title="{% trans 'H' %} 2 (Ctrl+Alt+2)">{% trans 'H' %} 2</a>
+        </li>
+        <li>
+            <a class=" markdown-selector markdown-h3" title="{% trans 'H' %} 3 (Ctrl+Alt+3)">{% trans 'H' %} 3</a>
+        </li>
+    </ul>
+
+
+    <a class="dropdown-trigger btn-flat" title="{% trans 'Pre or Code' %}"
+       data-target="dropdown-precode-{{ field_name }}">
+        <i class="material-icons">code</i>
+    </a>
+
+    <ul class="dropdown-content" id="dropdown-precode-{{ field_name }}">
+        <li>
+            <a class="item markdown-selector markdown-pre" title="{% trans 'Pre' %} (Ctrl+Alt+P)">{% trans 'Pre' %}</a>
+        </li>
+        <li>
+            <a class="item markdown-selector markdown-code"
+               title="{% trans 'Code' %} (Ctrl+Alt+C)">{% trans 'Code' %}</a>
+        </li>
+    </ul>
+
+
+    <a class="markdown-selector btn-flat markdown-blockquote"
+       title="{% trans 'Quote' %} (Ctrl+Q)">
+        <i class="material-icons">format_quote</i>
+    </a>
+    <a class="markdown-selector btn-flat markdown-unordered-list"
+       title="{% trans 'Unordered List' %} (Ctrl+U)">
+        <i class="material-icons">format_list_bulleted</i>
+    </a>
+    <a class="markdown-selector btn-flat markdown-ordered-list"
+       title="{% trans 'Ordered List' %} (Ctrl+Shift+O)">
+        <i class="material-icons">format_list_numbered</i>
+    </a>
+
+    <a class="markdown-selector btn-flat markdown-link" title="{% trans 'URL/Link' %} (Ctrl+L)">
+        <i class="material-icons">insert_link</i>
+    </a>
+    {#    <a class="markdown-selector btn-flat markdown-image-link"#}
+    {#       title="{% trans 'Insert Image Link' %} (Ctrl+Shift+I)">#}
+    {#        <i class="material-icons">insert_photo</i>#}
+    {#    </a>#}
+    {#    <a class="markdown-selector btn-flat markdown-image-upload"#}
+    {#       title="{% trans 'Upload an Image' %}">#}
+    {#        <i class="material-icons">file_upload</i>#}
+    {#        <input name="markdown-image-upload" class="button" type="file" accept="image/*"#}
+    {#               title="{% trans 'Upload an Image' %}">#}
+    {#    </a>#}
+    {#    <a class="markdown-selector btn-flat markdown-emoji" title="{% trans 'Insert Emoji' %}">#}
+    {#        <i class="material-icons">face</i>#}
+    {#    </a>#}
+    {#    <a class="markdown-selector btn-flat markdown-direct-mention"#}
+    {#       title="{% trans 'Direct Mention a User' %} (Ctrl+M)">#}
+    {#        <i class="material-icons">people</i>#}
+    {#    </a>#}
+
+    <a class="markdown-selector btn-flat markdown-toggle-maximize"
+       title="{% trans 'Full Screen' %}">
+        <i class="material-icons maximize icon"></i>
+    </a>
+    <a class="markdown-selector btn-flat markdown-help modal-trigger"
+       title="{% trans 'Markdown Guide (Help)' %}" href="#modal-{{ field_name }}">
+        <i class="material-icons">help</i>
+    </a>
+</div>
+
diff --git a/schoolapps/templates/partials/footer.html b/schoolapps/templates/partials/footer.html
index 56f644828ed4c73aef3fa26362a99343042f2826..e3206126bbb3645997b7041fd3f9aa50e36aeb1d 100755
--- a/schoolapps/templates/partials/footer.html
+++ b/schoolapps/templates/partials/footer.html
@@ -23,7 +23,6 @@
 <!---------------->
 <script src="{% static 'common/manup.min.js' %}"></script>
 <script src="{% static "common/pwabuilder-sw-register.js" %}"></script>
-<script src="{% static 'js/jquery/jquery-3.3.1.slim.min.js' %}"></script>
 <script src="{% static 'js/materialize.min.js' %}"></script>
 <script src="{% static 'common/helper.js' %}"></script>
 </body>
diff --git a/schoolapps/templates/partials/header.html b/schoolapps/templates/partials/header.html
index 14360a7a8195582918158a46b18fcfd96fba5963..dd04498840fa6187a18814adc4fc30d0542cb4cc 100755
--- a/schoolapps/templates/partials/header.html
+++ b/schoolapps/templates/partials/header.html
@@ -22,7 +22,12 @@
           href="{% static 'css/materialize.min.css' %}">
     <link rel="stylesheet" type="text/css" href="{% static 'common/style.css' %}">
     <script src="{% static 'js/jquery/jquery-3.3.1.slim.min.js' %}"></script>
-
+    {% if martor %}
+        <link href="{% static 'plugins/css/ace.min.css' %}" type="text/css" media="all" rel="stylesheet"/>
+        <link href="{% static 'plugins/css/resizable.min.css' %}" type="text/css" media="all" rel="stylesheet"/>
+        <link href="{% static 'martor/css/martor.min.css' %}" type="text/css" media="all" rel="stylesheet"/>
+    {% endif %}
+  
     <!-- Matomo -->
     <script type="text/javascript">
         var _paq = _paq || [];
@@ -41,7 +46,7 @@
             s.parentNode.insertBefore(g, s);
         })();
     </script>
-    <!-- End Matomo Code -->
+    <!-- End Matomo Code -->    
 </head>
 <body>
 <header>
@@ -125,11 +130,6 @@
                         <span class="badge new primary-color ">SMART PLAN</span>
                     </a>
                 </li>
-                {#                <li>#}
-                {#                    <a href="{% url 'timetable_admin_all' %}">#}
-                {#                        <i class="material-icons">grid_on</i> Alle Pläne#}
-                {#                    </a>#}
-                {#                </li>#}
                 <li>
                     <a href="{% url 'timetable_quicklaunch' %}">
                         <i class="material-icons">grid_on</i> Alle Pläne
@@ -140,9 +140,23 @@
                         <i class="material-icons">update</i> Vertretungsplan
                     </a>
                 </li>
+                {% if perms.timetable.view_hint %}
+                    <li>
+                        <a href="{% url 'timetable_hints' %}">
+                            <i class="material-icons">announcement</i> Hinweismanagement
+                        </a>
+                    </li>
+                {% endif %}
+                <li>
+                    <a href="{% url 'debug_logs' %}">
+                        <i class="material-icons">error</i> Debuggingtool
+                    </a>
+                </li>
                 <li>
                     <div class="divider"></div>
                 </li>
+
+
             {% endif %}
 
             <li>
diff --git a/schoolapps/timetable/admin.py b/schoolapps/timetable/admin.py
index 8c38f3f3dad51e4585f3984282c2a4bec5349c1e..4f20aea45bb6c46335f05d9f062cf0d57ab1a16b 100755
--- a/schoolapps/timetable/admin.py
+++ b/schoolapps/timetable/admin.py
@@ -1,3 +1,20 @@
 from django.contrib import admin
 
 # Register your models here.
+from timetable.models import Hint
+
+
+def refresh_cache(modeladmin, request, queryset):
+    for obj in queryset.all():
+        obj.save()
+
+
+refresh_cache.short_description = "Cache aktualisieren"
+
+
+class HintAdmin(admin.ModelAdmin):
+    exclude = ("text_as_latex", "classes_formatted")
+    actions = [refresh_cache]
+
+
+admin.site.register(Hint, HintAdmin)
diff --git a/schoolapps/timetable/filters.py b/schoolapps/timetable/filters.py
new file mode 100644
index 0000000000000000000000000000000000000000..8df8771d4a6eeb5355f4f722ad8f251c6c2998cc
--- /dev/null
+++ b/schoolapps/timetable/filters.py
@@ -0,0 +1,16 @@
+import django_filters
+from django.forms import Form
+from material import Fieldset, Row
+
+from .models import Hint
+
+
+class HintForm(Form):
+    layout = Row("from_date", "to_date", "classes", "teachers")
+
+
+class HintFilter(django_filters.FilterSet):
+    class Meta:
+        model = Hint
+        fields = ['from_date', "to_date", "classes", "teachers"]
+        form = HintForm
diff --git a/schoolapps/timetable/forms.py b/schoolapps/timetable/forms.py
new file mode 100644
index 0000000000000000000000000000000000000000..05bc162a731e6b9633e83d695cc648dfe70bde01
--- /dev/null
+++ b/schoolapps/timetable/forms.py
@@ -0,0 +1,17 @@
+from django.core.exceptions import ValidationError
+from django.forms import ModelForm
+
+from timetable.models import Hint
+
+
+class HintForm(ModelForm):
+    class Meta:
+        model = Hint
+        fields = ("from_date", "to_date", "text", "classes", "teachers")
+
+    def clean(self):
+        super().clean()
+        print("validate")
+        print(self.cleaned_data["classes"], self.cleaned_data["teachers"])
+        if len(self.cleaned_data["classes"]) == 0 and self.cleaned_data["teachers"] is False:
+            raise ValidationError("Bitte gib eine Zielgruppe an (Klassen oder Lehrer).")
diff --git a/schoolapps/timetable/hints.py b/schoolapps/timetable/hints.py
new file mode 100644
index 0000000000000000000000000000000000000000..89340aa9f11e0b9b836b77459d01e42a77d2336d
--- /dev/null
+++ b/schoolapps/timetable/hints.py
@@ -0,0 +1,56 @@
+import datetime
+
+from timetable.models import Hint
+
+
+def get_all_hints_by_date(date):
+    hints = filter_date(date)
+    return hints
+
+
+def get_all_hints_by_class_and_time_period(_class, from_date, to_date):
+    hints_tmp = get_all_hints_by_time_period(from_date, to_date)
+    hints_match = []
+    for hint in hints_tmp:
+        if _class.id in [x.class_id for x in hint.classes.all()]:
+            hints_match.append(hint)
+    return hints_match
+
+
+def get_all_hints_for_teachers_by_time_period(from_date, to_date):
+    hints_tmp = get_all_hints_by_time_period(from_date, to_date)
+    hints_match = []
+    for hint in hints_tmp:
+        if hint.teachers:
+            hints_match.append(hint)
+    return hints_match
+
+
+def get_all_hints_not_for_teachers_by_time_period(from_date, to_date):
+    hints_tmp = get_all_hints_by_time_period(from_date, to_date)
+    hints_match = []
+    for hint in hints_tmp:
+        if not hint.teachers:
+            hints_match.append(hint)
+    return hints_match
+
+
+def get_all_hints_by_time_period(from_date, to_date):
+    print(from_date, to_date)
+    delta = to_date - from_date
+    print(delta.days + 1)
+    week_days = [from_date + datetime.timedelta(days=i) for i in range(delta.days + 1)]
+
+    hints = []
+    for week_day in week_days:
+        hints_tmp = get_all_hints_by_date(week_day)
+        for hint in hints_tmp:
+            if hint not in hints:
+                hints.append(hint)
+    print(hints)
+    return hints
+
+
+def filter_date(date):
+    hints = Hint.objects.filter(from_date__lte=date, to_date__gte=date).order_by("from_date", "classes")
+    return hints
diff --git a/schoolapps/timetable/m2l.py b/schoolapps/timetable/m2l.py
new file mode 100644
index 0000000000000000000000000000000000000000..99a76157341a3d1228d8d32e4041516b5265d984
--- /dev/null
+++ b/schoolapps/timetable/m2l.py
@@ -0,0 +1,45 @@
+import os
+import subprocess
+
+from debug.models import register_log_with_filename
+from schoolapps.settings import BASE_DIR
+
+
+# from .models import register_log_with_filename
+
+
+def convert_markdown_2_latex(s):
+    try:
+        # Write markdown file
+        md_file = open(os.path.join(BASE_DIR, "latex", "m2l.md"), "w", encoding="utf8")
+        md_file.write(s)
+        md_file.close()
+
+        # Execute pandoc to convert markdown to latex
+        bash_command = "pandoc --log={} --from markdown --to latex --output {} {}".format(
+            os.path.join(BASE_DIR, "latex", "m2l.log"),
+            os.path.join(BASE_DIR, "latex", "m2l.tex"),
+            os.path.join(BASE_DIR, "latex", "m2l.md"))
+        process = subprocess.Popen(bash_command.split(), stdout=subprocess.PIPE)
+        output = process.communicate()[0]
+        del output
+
+        # Register log file in debugging tool
+        register_log_with_filename("m2l", "m2l", "m2l.log", process.returncode)
+
+        # Read converted latex from file
+        tex_file = open(os.path.join(BASE_DIR, "latex", "m2l.tex"), "r", encoding="utf8")
+        r = tex_file.read()
+        tex_file.close()
+
+        # Replace some things
+        r = r.replace("\subparagraph", "\subsubsection")
+        r = r.replace("\paragraph", "\subsubsection")
+        r = r.replace("section", "section*")
+
+        # Return latex
+        return r
+    except Exception as e:
+        # Print error
+        print("[MD TO LATEX]", e)
+        return ""
diff --git a/schoolapps/timetable/migrations/0001_initial.py b/schoolapps/timetable/migrations/0001_initial.py
new file mode 100644
index 0000000000000000000000000000000000000000..d5858985e0d60f1fd3c5e3ac610d112036446054
--- /dev/null
+++ b/schoolapps/timetable/migrations/0001_initial.py
@@ -0,0 +1,38 @@
+# Generated by Django 2.1.5 on 2019-04-10 12:30
+
+import datetime
+from django.db import migrations, models
+import martor.models
+
+
+class Migration(migrations.Migration):
+    initial = True
+
+    dependencies = [
+        ('untisconnect', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Hint',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('from_date', models.DateField(default=datetime.date.today, verbose_name='Startdatum')),
+                ('to_date', models.DateField(default=datetime.date.today, verbose_name='Enddatum')),
+                ('text', martor.models.MartorField(verbose_name='Hinweistext')),
+            ],
+            options={
+                'verbose_name': 'Hinweis',
+                'verbose_name_plural': 'Hinweise',
+            },
+        ),
+        migrations.CreateModel(
+            name='Timetable',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+            ],
+            options={
+                'permissions': (('show_plan', 'Show plan'),),
+            },
+        ),
+    ]
diff --git a/schoolapps/timetable/migrations/0002_hintclass.py b/schoolapps/timetable/migrations/0002_hintclass.py
new file mode 100644
index 0000000000000000000000000000000000000000..7f5dd35eaabf06322e7c310ac5e584dfd8d5f090
--- /dev/null
+++ b/schoolapps/timetable/migrations/0002_hintclass.py
@@ -0,0 +1,19 @@
+# Generated by Django 2.1.5 on 2019-04-10 12:35
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('timetable', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='HintClass',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('class_id', models.IntegerField()),
+            ],
+        ),
+    ]
diff --git a/schoolapps/timetable/migrations/0003_auto_20190410_1634.py b/schoolapps/timetable/migrations/0003_auto_20190410_1634.py
new file mode 100644
index 0000000000000000000000000000000000000000..b2111e6ddce35c3b29ac7b64fef787d181c293af
--- /dev/null
+++ b/schoolapps/timetable/migrations/0003_auto_20190410_1634.py
@@ -0,0 +1,27 @@
+# Generated by Django 2.1.5 on 2019-04-10 14:34
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('timetable', '0002_hintclass'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='hint',
+            name='classes',
+            field=models.ManyToManyField(related_name='hints', to='timetable.HintClass'),
+        ),
+        migrations.AlterField(
+            model_name='hintclass',
+            name='class_id',
+            field=models.IntegerField(
+                choices=[(1, '5a'), (2, '5b'), (3, '5c'), (4, '5d'), (5, '6a'), (6, '6b'), (7, '6c'), (8, '6d'),
+                         (9, '7a'), (10, '7b'), (11, '7c'), (12, '7d'), (13, '8a'), (14, '8b'), (15, '8c'), (16, '8d'),
+                         (17, '9a'), (18, '9b'), (19, '9c'), (20, '9d'), (21, 'Ea'), (22, 'Eb'), (23, 'Ec'), (24, 'Ed'),
+                         (25, 'Q1a'), (26, 'Q1b'), (27, 'Q1c'), (28, 'Q1d'), (29, 'Q2a'), (30, 'Q2b'), (31, 'Q2c'),
+                         (32, 'Q2d')]),
+        ),
+    ]
diff --git a/schoolapps/timetable/migrations/0004_auto_20190411_1219.py b/schoolapps/timetable/migrations/0004_auto_20190411_1219.py
new file mode 100644
index 0000000000000000000000000000000000000000..6ddb7b934620a2571c81e052c529d6413589516a
--- /dev/null
+++ b/schoolapps/timetable/migrations/0004_auto_20190411_1219.py
@@ -0,0 +1,22 @@
+# Generated by Django 2.2 on 2019-04-11 10:19
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('timetable', '0003_auto_20190410_1634'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='hint',
+            name='teachers',
+            field=models.BooleanField(default=False, verbose_name='Lehrer?'),
+        ),
+        migrations.AlterField(
+            model_name='hint',
+            name='classes',
+            field=models.ManyToManyField(related_name='hints', to='timetable.HintClass', verbose_name='Klassen'),
+        ),
+    ]
diff --git a/schoolapps/timetable/migrations/0005_auto_20190413_1413.py b/schoolapps/timetable/migrations/0005_auto_20190413_1413.py
new file mode 100644
index 0000000000000000000000000000000000000000..c7cc57b2030abbfa65e827a4fd063a5fc026c0bd
--- /dev/null
+++ b/schoolapps/timetable/migrations/0005_auto_20190413_1413.py
@@ -0,0 +1,23 @@
+# Generated by Django 2.2 on 2019-04-13 12:13
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('timetable', '0004_auto_20190411_1219'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='hint',
+            name='classes',
+            field=models.ManyToManyField(blank=True, related_name='hints', to='timetable.HintClass',
+                                         verbose_name='Klassen'),
+        ),
+        migrations.AlterField(
+            model_name='hint',
+            name='teachers',
+            field=models.BooleanField(blank=True, default=False, verbose_name='Lehrer?'),
+        ),
+    ]
diff --git a/schoolapps/timetable/migrations/0006_hint_text_as_latex.py b/schoolapps/timetable/migrations/0006_hint_text_as_latex.py
new file mode 100644
index 0000000000000000000000000000000000000000..d65a827375bfbbcb3d0645e40caab583798c382e
--- /dev/null
+++ b/schoolapps/timetable/migrations/0006_hint_text_as_latex.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.2.1 on 2019-05-02 15:08
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('timetable', '0005_auto_20190413_1413'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='hint',
+            name='text_as_latex',
+            field=models.TextField(blank=True, verbose_name='LaTeX (automatisch)'),
+        ),
+    ]
diff --git a/schoolapps/timetable/migrations/0007_hintclass_class_name.py b/schoolapps/timetable/migrations/0007_hintclass_class_name.py
new file mode 100644
index 0000000000000000000000000000000000000000..4c78edad93f29fa16b7dc355464f8803f06802d9
--- /dev/null
+++ b/schoolapps/timetable/migrations/0007_hintclass_class_name.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.2.1 on 2019-05-02 15:21
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('timetable', '0006_hint_text_as_latex'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='hintclass',
+            name='class_name',
+            field=models.CharField(default='…', max_length=100),
+        ),
+    ]
diff --git a/schoolapps/timetable/migrations/0008_auto_20190502_1722.py b/schoolapps/timetable/migrations/0008_auto_20190502_1722.py
new file mode 100644
index 0000000000000000000000000000000000000000..a518536d0558d0425bf33c34b66a78fd0a4b7d91
--- /dev/null
+++ b/schoolapps/timetable/migrations/0008_auto_20190502_1722.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.2.1 on 2019-05-02 15:22
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('timetable', '0007_hintclass_class_name'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='hintclass',
+            old_name='class_name',
+            new_name='name',
+        ),
+    ]
diff --git a/schoolapps/timetable/migrations/0009_hint_classes_formatted.py b/schoolapps/timetable/migrations/0009_hint_classes_formatted.py
new file mode 100644
index 0000000000000000000000000000000000000000..5922fdd2249f5c8c5fd434f09b075578f9b857ac
--- /dev/null
+++ b/schoolapps/timetable/migrations/0009_hint_classes_formatted.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.2.1 on 2019-05-02 15:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('timetable', '0008_auto_20190502_1722'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='hint',
+            name='classes_formatted',
+            field=models.CharField(blank=True, max_length=200),
+        ),
+    ]
diff --git a/schoolapps/timetable/migrations/__init__.py b/schoolapps/timetable/migrations/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/schoolapps/timetable/models.py b/schoolapps/timetable/models.py
index 6f186228e37d3311f0160f061d3fe7593447742d..cc667426fee0458f9a7e464f1add63053cd56ab3 100755
--- a/schoolapps/timetable/models.py
+++ b/schoolapps/timetable/models.py
@@ -1,24 +1,87 @@
-from django import forms
-import dbsettings
+import os
+from datetime import date
+
 from django.db import models
+from django.utils import timezone
+from martor.models import MartorField
 
-from untisconnect.api_helper import get_terms
+from schoolapps.settings import BASE_DIR
+from timetable.m2l import convert_markdown_2_latex
+from untisconnect.api import get_all_classes, format_classes
+from untisconnect.models import Class
 
-choices = []
-terms = get_terms()
-for term in terms:
-    choices.append((term.id, term.name))
+classes = get_all_classes()
+class_choices = [(x.id, x.name) for x in classes]
 
 
-class Timetable(models.Model):
+class HintClass(models.Model):
+    """Maps a UNTIS class to a usable format for Django models"""
+    class_id = models.IntegerField(choices=class_choices)
+    name = models.CharField(max_length=100, default="…")
+
+    def __str__(self):
+        return self.name
+
+
+# Map all classes from UNTIS to HintClass objects
+for x in classes:
+    obj, _ = HintClass.objects.get_or_create(class_id=x.id)
+    obj.name = x.name
+    obj.save()
+
+
+class Hint(models.Model):
+    # Time
+    from_date = models.DateField(default=date.today, verbose_name="Startdatum")
+    to_date = models.DateField(default=date.today, verbose_name="Enddatum")
+
+    # Text
+    text = MartorField(verbose_name="Hinweistext")
+
+    # Relations
+    classes = models.ManyToManyField(HintClass, related_name="hints", verbose_name="Klassen", blank=True)
+    teachers = models.BooleanField(verbose_name="Lehrer?", default=False, blank=True)
+
+    # Caching
+    text_as_latex = models.TextField(verbose_name="LaTeX (automatisch)", blank=True)
+    classes_formatted = models.CharField(max_length=200, blank=True)
+
     class Meta:
-        permissions = (
-            ('show_plan', 'Show plan'),
-        )
+        verbose_name = "Hinweis"
+        verbose_name_plural = "Hinweise"
 
+    def __init__(self, *args, **kwargs):
+        super(Hint, self).__init__(*args, **kwargs)
 
-class UNTISSettings(dbsettings.Group):
-    term = dbsettings.IntegerValue(widget=forms.Select, choices=choices)
+    def __str__(self):
+        targets = self.classes_formatted
+        if self.teachers and targets != "":
+            targets += ", Lehrkräfte"
+        elif self.teachers:
+            targets = "Lehrkräfte"
 
+        return "[{}]: {}–{}".format(targets, self.from_date, self.to_date)
 
-untis_settings = UNTISSettings()
+    def save(self, force_insert=False, force_update=False, using=None,
+             update_fields=None):
+        # Convert LaTeX already when saving as cache because then is no need to do it later > performance savings
+        self.text_as_latex = convert_markdown_2_latex(self.text)
+
+        super(Hint, self).save(force_insert=force_insert, force_update=force_update, using=using,
+                               update_fields=update_fields)
+
+        # Format classes already > cache, too
+        self.classes_formatted = format_classes(self.classes.all())
+
+        super(Hint, self).save(force_insert=force_insert, force_update=force_update, using=using,
+                               update_fields=update_fields)
+
+
+
+
+
+class Timetable(models.Model):
+    class Meta:
+        permissions = (
+            ('show_plan', 'Show plan'),
+        )
diff --git a/schoolapps/timetable/pdf.py b/schoolapps/timetable/pdf.py
index 52f8cb8792fccbbd01d4896a7fff410bcc966d1c..713437b6896f0e067c7eb0451ec830902ff10794 100644
--- a/schoolapps/timetable/pdf.py
+++ b/schoolapps/timetable/pdf.py
@@ -1,203 +1,42 @@
 import os
 import subprocess
 
-from django.utils import timezone
-from django.utils import formats
+from django.template.loader import render_to_string
 
 from schoolapps.settings import BASE_DIR
+from debug.models import register_log_with_filename
 
-# LaTeX constants
-from untisconnect.sub import get_header_information
-
-DIR = os.path.join(BASE_DIR, "static", "common", "logo.png")
-TEX_HEADER_1 = """\\documentclass[11pt]{article}
-\\usepackage[ngerman]{babel}
-\\usepackage[sfdefault]{cabin}
-\\usepackage[utf8]{inputenc}
-\\usepackage[a4paper,left=1cm,right=1cm,top=2cm,bottom=2cm,bindingoffset=0mm]{geometry}
-
-% Packages
-\\usepackage{fancyhdr}
-\\usepackage{graphicx}
-\\usepackage{longtable}
-\\usepackage{multirow}
-\\usepackage{color, colortbl}
-\\usepackage{geometry}
-
-\\usepackage{ulem, xpatch}
-\\xpatchcmd{\\sout}
-  {\\bgroup}
-  {\\bgroup\def\\ULthickness{1.5pt}}
-  {}{}
-
-% Badge box
-\\usepackage{tcolorbox}
-\\newtcbox{\\badge}{nobeforeafter,colframe=green,colback=green,boxrule=0.5pt,arc=4pt,
-  boxsep=0pt,left=5pt,right=5pt,top=5pt,bottom=5pt,tcbox raise base,
-  grow to left by=0pt,
-  grow to right by=-3pt,
-  enlarge top by=3pt,
-  enlarge bottom by=3pt,coltext=white}
-
-% Define colors
-\\definecolor{grey}{RGB}{208, 208, 208}
-\\definecolor{darkgrey}{rgb}{0.6,0.6,0.6}
-\\definecolor{white}{rgb}{1,1,1}
-\\definecolor{green}{RGB}{76,175,80}
-
-% Define header
-\\pagestyle{fancy}
-% Left header: logo
-\\lhead{\\includegraphics[width=5cm]{"""
-
-TEX_HEADER_2 = """}}
-% Define footer
-\\lfoot{Katharineum zu Lübeck}
-\\cfoot{\\thepage}
-\\rfoot{\\small Umsetzung: © 2018--2019 by Computer-AG}
-
-\\begin{document}"""
-TEX_HEADER = TEX_HEADER_1 + DIR + TEX_HEADER_2
-
-TEX_FOOTER = '\end{document}'
-
-TEX_TABLE_HEADER_CLASS = """
-% Init table
-\def\\arraystretch{1.5}
-\\begin{longtable}{p{20mm}p{8mm}p{32mm}p{25mm}p{30mm}p{45mm}}
-\\textbf{Klassen} & 
-\\textbf{Std.} & 
-\\textbf{Lehrer} & 
-\\textbf{Fach} & 
-\\textbf{Raum} & 
-\\textbf{Hinweis}\\\\
-\\hline
-\\endhead
-"""
-
-TEX_HEADER_CLASS = """
-\\rhead{\\textbf{Vertretungen %s}\\\\Stand: %s\\\\ }
-\\Large
-\\subsubsection*{}
-\\section*{\\Huge Vertretungen %s}
-\n"""
-
-TEX_HEADER_BOX_START = """
-\\fbox{\\parbox{0.27\\linewidth}{
-"""
-
-TEX_HEADER_BOX_MIDDLE = """
-}\\parbox{0.73\\linewidth}{
-"""
-
-TEX_HEADER_BOX_END = """
-}} \n\n
-"""
-
-TEX_HEADER_BOX_ROW_A = """
-\\textbf{%s} 
-"""
-
-TEX_HEADER_BOX_ROW_B = """
-%s 
-"""
+LOGO_FILENAME = os.path.join(BASE_DIR, "static", "common", "logo.png")
 
 
 def generate_pdf(tex, filename):
     """Generate a PDF by LaTeX code"""
 
-    # Read LaTeX file
+    # Write LaTeX file
     tex_file = open(os.path.join(BASE_DIR, "latex", filename + ".tex"), "w", encoding="utf8")
-
     tex_file.write(tex)
     tex_file.close()
 
     # Execute pdflatex to generate the PDF
-    bash_command = "pdflatex -output-directory {} {}.tex".format(os.path.join(BASE_DIR, "latex"),
-                                                                 os.path.join(BASE_DIR, "latex", filename))
-    print(bash_command)
+    bash_command = "pdflatex -halt-on-error -output-directory {} {}.tex".format(os.path.join(BASE_DIR, "latex"),
+                                                                                os.path.join(BASE_DIR, "latex",
+                                                                                             filename))
     process = subprocess.Popen(bash_command.split(), stdout=subprocess.PIPE)
     output = process.communicate()[0]
-    print(output)
-
+    del output
 
-def tex_replacer(s):
-    """Replace HTML tags by LaTeX tags"""
+    # Register log file in debugging tool
+    register_log_with_filename("latex_{}".format(filename), "latex", "{}.log".format(filename), process.returncode)
 
-    # Strong text
-    s = s.replace("<strong>", "\\textbf{")
-    s = s.replace("</strong>", "}")
 
-    # Struck out text
-    s = s.replace("<s>", "\\sout{")
-    s = s.replace("</s>", "}")
-
-    # Arrow
-    s = s.replace("→", "$\\rightarrow$")
-
-    return s
-
-
-def generate_class_tex(subs, date, header_info):
+def generate_class_tex(subs, date, header_info, hints=None):
     """Generate LaTeX for a PDF by a substitution table"""
 
-    tex_body = ""
-
-    # Format dates
-    status_date = formats.date_format(date, format="j. F Y, \\K\\W W ")
-    current_date = formats.date_format(timezone.datetime.now(), format="j. F Y H:i")
-    head_date = formats.date_format(date, format="l, j. F Y")
-
-    # Generate header with dates
-    tex_body += TEX_HEADER_CLASS % (status_date, current_date, head_date)
-
-    if header_info.is_box_needed():
-        tex_body += TEX_HEADER_BOX_START
-        for row in header_info.rows:
-            tex_body += TEX_HEADER_BOX_ROW_A % row[0]
-        tex_body += TEX_HEADER_BOX_MIDDLE
-        for row in header_info.rows:
-            tex_body += TEX_HEADER_BOX_ROW_B % row[1]
-        tex_body += TEX_HEADER_BOX_END
-    # Begin table
-    tex_body += TEX_TABLE_HEADER_CLASS
-
-    color_background = True
-    last_classes = ""
-    for sub in subs:
-        # Color groups of classes in grey/white
-        if last_classes != sub.classes:
-            color_background = not color_background
-
-        last_classes = sub.classes
-
-        if color_background:
-            tex_body += '\\rowcolor{grey}'
-
-        # Get color tag for row
-        color = "\color{%s}" % sub.color
-
-        # Print classes
-        # print(sub.classes)
-        tex_body += color
-        tex_body += '\\textbf{' + sub.classes + '} & '
-
-        # Print lesson number, teacher, subject and room
-        for i in [sub.lesson, sub.teacher, sub.subject, sub.room]:
-            tex_body += color
-            tex_body += tex_replacer(i) + ' & '
-
-        # Print badge (Cancellation)
-        if sub.badge is not None:
-            tex_body += """\\large\\badge{%s}""" % sub.badge
-
-        # Print notice and new line
-        tex_body += color
-        tex_body += "\\Large\\textit{%s}\\\\\n" % (sub.text or "")
-
-    # End table
-    tex_body += '\\end{longtable}'
-
-    # Connect header, body and footer
-    tex_content = TEX_HEADER + tex_body + TEX_FOOTER
-    return tex_content
+    context = {
+        "subs": subs,
+        "date": date,
+        "header_info": header_info,
+        "LOGO_FILENAME": LOGO_FILENAME,
+        "hints": hints
+    }
+    return render_to_string("timetable/latex/substitutions.tex", context)
diff --git a/schoolapps/timetable/settings.py b/schoolapps/timetable/settings.py
new file mode 100644
index 0000000000000000000000000000000000000000..fc4ffa73a63bb21d84b7870958bd0de7fd9727a6
--- /dev/null
+++ b/schoolapps/timetable/settings.py
@@ -0,0 +1,16 @@
+import dbsettings
+from django import forms
+
+from untisconnect.api_helper import get_terms
+
+choices = []
+terms = get_terms()
+for term in terms:
+    choices.append((term.id, term.name))
+
+
+class UNTISSettings(dbsettings.Group):
+    term = dbsettings.IntegerValue(widget=forms.Select, choices=choices)
+
+
+untis_settings = UNTISSettings()
diff --git a/schoolapps/timetable/templates/timetable/hintform.html b/schoolapps/timetable/templates/timetable/hintform.html
new file mode 100755
index 0000000000000000000000000000000000000000..60593e9ae08ea34294e78fc502e8d97fbc663aa7
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/hintform.html
@@ -0,0 +1,142 @@
+{% include 'partials/header.html' %}
+{% load material_form %}
+{% load martortags %}
+{% load static %}
+{% load widget_tweaks %}
+
+<main>
+    <h4>
+        {% if mode == "new" %}
+            Neuen Hinweis erstellen
+        {% else %}
+            Hinweis bearbeiten
+        {% endif %}
+    </h4>
+
+    {% if msg == "success" %}
+        <div class="alert success">
+            <p>
+                <i class="material-icons left">check_circle</i>
+                Der Hinweis wurde erfolgreich erstellt und veröffentlicht. Weiteren Hinweis anlegen oder zur Übersicht
+                zurück?<br>
+                <a class="btn waves-effect waves-light" href="{% url "timetable_hints" %}"><i
+                        class="material-icons left">arrow_back</i> Zurück zur Übersicht
+                </a>
+                <a class="btn waves-effect waves-light green" href="#add-hint"><i class="material-icons left">add</i>
+                    Weiteren Hinweis hinzufügen
+                </a>
+            </p>
+        </div>
+    {% endif %}
+
+    <form method="post" action="" id="add-hint">
+        {% csrf_token %}
+        {% if form.non_field_errors %}
+            <div class="alert error">
+                <div>
+                    <i class="material-icons left">warning</i>
+                    {{ form.non_field_errors }}
+                </div>
+            </div>
+        {% endif %}
+        <h5>Ãœber welchen Zeitraum soll der Hinweis angezeigt werden?
+            <span class="red-text">*</span>
+        </h5>
+
+        <div class="row">
+            <div class="col s12 m6">
+                {% if form.from_date.errors %}
+                    <div class="alert error">
+                        <div>
+                            <i class="material-icons left">warning</i>
+                            {{ form.from_date.errors }}
+                        </div>
+                    </div>
+                {% endif %}
+                {{ form.from_date.label_tag }}
+                {{ form.from_date|add_class:"datepicker required" }}
+            </div>
+            <div class="col s12 m6">
+                {% if form.to_date.errors %}
+                    <div class="alert error">
+                        <div>
+                            <i class="material-icons left">warning</i>
+                            {{ form.to_date.erros }}
+                        </div>
+                    </div>
+                {% endif %}
+                {{ form.to_date.label_tag }}
+                {{ form.to_date|add_class:"datepicker required" }}
+            </div>
+        </div>
+        <h5>Für wen soll der Hinweis angezeigt werden?
+            <span class="red-text">*</span>
+        </h5>
+
+        {% if form.classes.errors %}
+            <div class="alert error">
+                <div>
+                    <i class="material-icons left">warning</i>
+                    {{ form.classes.erros }}
+                </div>
+            </div>
+        {% endif %}
+        {{ form.classes.label_tag }}
+        {{ form.classes }}
+        <a href="#" id="select-all-classes">Alle auswählen</a>
+        ·
+        <a href="#" id="deselect-all-classes">Alle abwählen</a>
+        <script type="text/javascript">
+            $("#select-all-classes").click(function () {
+                $(".select-wrapper ul li:not(.selected)").click();
+            })
+            $("#deselect-all-classes").click(function () {
+                $(".select-wrapper ul li.selected").click();
+            })
+        </script>
+
+        {% if form.teachers.errors %}
+            <div class="alert error">
+                <div>
+                    <i class="material-icons left">warning</i>
+                    {{ form.teachers.erros }}
+                </div>
+            </div>
+        {% endif %}
+        <p>
+            <label>
+                {{ form.teachers }}
+                <span>Für Lehrer anzeigen?</span>
+            </label>
+        </p>
+
+        <h5>Hinweistext
+            <span class="red-text">*</span>
+        </h5>
+        {% if form.text.errors %}
+            <div class="alert error">
+                <div>
+                    <i class="material-icons left">warning</i>
+                    {{ form.text.erros }}
+                </div>
+            </div>
+        {% endif %}
+        {{ form.text }}
+
+
+        <button type="submit" class="waves-effect waves-light btn green">
+            <i class="material-icons left">save</i> Hinweis {% if mode == "new" %} erstellen und
+            veröffentlichen {% else %} aktualisieren {% endif %}
+        </button>
+    </form>
+
+    <script type="text/javascript" src="{% static 'plugins/js/ace.js' %}"></script>
+    <script type="text/javascript" src="{% static 'plugins/js/mode-markdown.js' %}"></script>
+    <script type="text/javascript" src="{% static 'plugins/js/ext-language_tools.js' %}"></script>
+    <script type="text/javascript" src="{% static 'plugins/js/theme-github.js' %}"></script>
+    <script type="text/javascript" src="{% static 'plugins/js/highlight.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'plugins/js/resizable.min.js' %}"></script>
+    <script type="text/javascript" src="{% static 'martor/js/martor.min.js' %}"></script>
+</main>
+
+{% include 'partials/footer.html' %}
diff --git a/schoolapps/timetable/templates/timetable/hints.html b/schoolapps/timetable/templates/timetable/hints.html
new file mode 100755
index 0000000000000000000000000000000000000000..bd289497abc631395f82ef67daf6b34937794c23
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/hints.html
@@ -0,0 +1,85 @@
+{% include 'partials/header.html' %}
+{% load material_form %}
+{% load martortags %}
+
+<main>
+    <h4>Hinweismanagement</h4>
+
+    {% if msg %}
+        <div class="alert success">
+            <p>
+                <i class="material-icons left">check_circle</i>
+                Der Hinweis wurde erfolgreich {% if msg == "success_edit" %}gespeichert. {% else %}
+                gelöscht. {% endif %}
+            </p>
+        </div>
+    {% endif %}
+
+    <div class="card">
+        <form method="GET" class="card-content">
+            <div class="row no-margin">
+                <div class="col s12 m4">
+                    <a href="{% url 'timetable_add_hint' %}" class="waves-effect waves-light btn green">
+                        <i class="material-icons left">add</i>
+                        Neuen Hinweis erstellen
+                    </a>
+                </div>
+                <div class="col s12 m8 right-align">
+                    <button type="submit" class="waves-effect waves-green btn-flat">
+                        <i class="material-icons left">refresh</i> Filter aktualisieren
+                    </button>
+                    <a class="waves-effect waves-red btn-flat " href="{% url "timetable_hints" %}">
+                        <i class="material-icons left">clear</i> Filter entfernen
+                    </a>
+                </div>
+            </div>
+            {% form form=f.form %}
+            {% endform %}
+        </form>
+    </div>
+
+    <ul class="collapsible">
+        {% for hint in f.qs %}
+            <li>
+                <div class="collapsible-header row no-margin">
+
+                    <div class="col s10">
+                        <strong>{{ hint.from_date }} &mdash; {{ hint.to_date }}</strong> für
+                        <strong>
+                            {{ hint.classes_formatted }}
+                        </strong>
+                        {% if hint.teachers %}
+                            <span class="badge new green no-float no-margin">Lehrkräfte</span>
+                        {% endif %}
+                    </div>
+                    <div class="col s2">
+                        <i class="material-icons right collapsible-trigger v2"></i>
+
+                    </div>
+
+                </div>
+                <div class="collapsible-body row">
+                    <div class="right">
+                        <a class="btn-flat waves-effect waves-green green-text"
+                           href="{% url "timetable_edit_hint" hint.id %}">
+                            <i class="material-icons left">edit</i>
+                            <span class="hide-on-small-only">Bearbeiten</span>
+                        </a>
+                        <a class="btn-flat waves-effect waves-red red-text delete-button"
+                           href="{% url "timetable_delete_hint" hint.id %}">
+                            <i class="material-icons left">delete</i>
+                            <span class="hide-on-small-only">Löschen</span>
+                        </a>
+
+                    </div>
+                    <div>
+                        <p>
+                            {{ hint.text|safe_markdown }}</p>
+                    </div>
+                </div>
+            </li>
+        {% endfor %}
+    </ul>
+</main>
+
+{% include 'partials/footer.html' %}
diff --git a/schoolapps/timetable/templates/timetable/hintsinplan.html b/schoolapps/timetable/templates/timetable/hintsinplan.html
new file mode 100644
index 0000000000000000000000000000000000000000..a6c4c4461d3ea4ef90544a1c9a74a64afcf84340
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/hintsinplan.html
@@ -0,0 +1,66 @@
+{% load martortags %}
+{% if hints %}
+    {% for hint in hints %}
+        <div class="card">
+            <div class="card-content light-blue lighten-4">
+                <em class="right hide-on-small-and-down">Hinweis für {{ hint.from_date|date:"D, d.m." }},
+                    {% if hint.from_date != hint.to_date %}
+                        bis {{ hint.to_date|date:"D, d.m." }}
+                    {% endif %} </em>
+
+                <i class="material-icons left">announcement</i>
+                {{ hint.text|safe_markdown }}
+
+                <em class="hide-on-med-and-up">Hinweis für {{ hint.from_date|date:"D, d.m." }},
+                    {% if hint.from_date != hint.to_date %}
+                        bis {{ hint.to_date|date:"D, d.m." }}
+                    {% endif %} </em>
+
+                {#        {{ hint }}#}
+            </div>
+        </div>
+    {% endfor %}
+{% endif %}
+
+{% if hints_b %}
+    <ul class="collapsible">
+        <li>
+            <div class="collapsible-header " style="font-size: 16px;">
+                <div class="col s12">
+                    <i class="material-icons left">add</i>
+                    Es gibt
+                    {% if hints_b_mode == "week" %}
+                        diese Woche
+                    {% else %}
+                        heute
+                    {% endif %}
+                    {% if hints %}
+                        noch
+                    {% endif %}
+                    {{ hints_b|length }}
+                    {% if hints %}
+                        weitere(n)
+                    {% endif %}
+                    Hinweis(e).
+                    <i class="material-icons right collapsible-trigger"></i>
+                </div>
+            </div>
+            <div class="collapsible-body">
+                {% for hint in hints_b %}
+                    {% if not hint.teachers %}
+                        <div>
+                            <strong>
+                                {{ hint.classes.all|join:", " }},
+                            </strong>
+                            {{ hint.from_date|date:"D, d.m." }},
+                            {% if hint.from_date != hint.to_date %}
+                                bis {{ hint.to_date|date:"D, d.m." }}
+                            {% endif %}:
+                            {{ hint.text|safe_markdown }}
+                        </div>
+                    {% endif %}
+                {% endfor %}
+            </div>
+        </li>
+    </ul>
+{% endif %}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/hintsinsub.html b/schoolapps/timetable/templates/timetable/hintsinsub.html
new file mode 100644
index 0000000000000000000000000000000000000000..32a022549dd4853c94f175e680b013f7fc502bd7
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/hintsinsub.html
@@ -0,0 +1,26 @@
+{% load martortags %}
+{% if hints %}
+    <ul class="collapsible">
+        <li>
+            <div class="collapsible-header " style="font-size: 16px;">
+                <div class="col s12">
+                    <i class="material-icons left">announcement</i>Es gibt {{ hints|length }} Hinweis(e) für diesen Tag.
+                    <i class="material-icons right collapsible-trigger"></i>
+                </div>
+            </div>
+            <div class="collapsible-body">
+                {% for hint in hints %}
+                    <div>
+                        <strong>
+                            {{ hint.classes.all|join:", " }}{% if hint.teachers and hint.classes.all %},{% endif %}
+                        </strong>
+                        {% if hint.teachers %}
+                            <span class="badge new green no-float no-margin">Lehrkräfte</span>
+                        {% endif %}:
+                        {{ hint.text|safe_markdown }}
+                    </div>
+                {% endfor %}
+            </div>
+        </li>
+    </ul>
+{% endif %}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/latex/hints.tex b/schoolapps/timetable/templates/timetable/latex/hints.tex
new file mode 100644
index 0000000000000000000000000000000000000000..7fc99548ea406d1aa500dbdad485b32cbe2a4323
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/latex/hints.tex
@@ -0,0 +1,16 @@
+{% load martortags %}
+{% if hints %}
+\subsection*{Hinweise}
+\vspace{-0.7em}
+\begin{itemize}
+    \setlength\itemsep{0.1em}
+    {% for hint in hints %}
+    \normalsize
+    \item \small
+    {{ hint.classes_formatted }}{% if hint.teachers and hint.classes.all %}, {% endif %}{% if hint.teachers %}Lehrkräfte{% endif %}:
+    \normalsize
+{{ hint.text_as_latex|safe }}
+{% endfor %}
+\end{itemize}
+\vspace{-1em}
+{% endif %}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/latex/room.tex b/schoolapps/timetable/templates/timetable/latex/room.tex
new file mode 100644
index 0000000000000000000000000000000000000000..917f43e79a17ac67d5721e9661fb53c7a382a67b
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/latex/room.tex
@@ -0,0 +1,13 @@
+{% if sub.sub.type == 3 %}
+{{ sub.sub.corridor.name }}
+{% elif sub.sub.type == 1 or sub.sub.type == 2 %}
+{% elif sub.sub.roow_new and sub.sub.room_old %}
+\sout{ {{ sub.sub.room_old.shortcode }} }
+$\rightarrow$
+\textbf{ {{ sub.sub.room_new.shortcode }} }
+{% elif sub.sub.room_new and not sub.sub.room_old %}
+{{ sub.sub.room_new.shortcode }}
+{% elif not sub.sub.room_new and not sub.sub.room_old %}
+{% else %}
+{{ sub.sub.room_old.shortcode }}
+{% endif %}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/latex/subject.tex b/schoolapps/timetable/templates/timetable/latex/subject.tex
new file mode 100644
index 0000000000000000000000000000000000000000..0a2cca45c8c50c1d0d62353eee429f4496343452
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/latex/subject.tex
@@ -0,0 +1,12 @@
+{% if sub.sub.type == 3 %}
+\textbf {Aufsicht }
+{% elif not sub.sub.subject_new and not sub.sub.subject_old %}
+{% elif sub.sub.type == 1 or sub.sub.type == 2 %}
+\sout { {{ sub.sub.subject_old.shortcode }} }
+{% elif sub.sub.subject_new and sub.sub.subject_old %}
+\sout { {{ sub.sub.subject_old.shortcode }} } $\rightarrow$ \textbf { {{ sub.sub.subject_new.shortcode }} }
+{% elif sub.sub.subject_new and not sub.sub.subject_old %}
+\textbf { {{ sub.sub.subject_new.shortcode }} }
+{% else %}
+\textbf { {{ sub.sub.subject_old.shortcode }} }
+{% endif %}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/latex/substitutions.tex b/schoolapps/timetable/templates/timetable/latex/substitutions.tex
new file mode 100644
index 0000000000000000000000000000000000000000..7a708ceeb75f3ec1af84b8077d7984e36752820f
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/latex/substitutions.tex
@@ -0,0 +1,134 @@
+{% load common %}
+
+\documentclass[11pt]{article}
+\usepackage[ngerman]{babel}
+\usepackage[sfdefault]{cabin}
+\usepackage[utf8]{inputenc}
+\usepackage[a4paper,left=1cm,right=1cm,top=2cm,bottom=2cm,bindingoffset=0mm]{geometry}
+
+% Packages
+\usepackage{fancyhdr}
+\usepackage{graphicx}
+\usepackage{longtable}
+\usepackage{booktabs}
+\usepackage{multirow}
+\usepackage{color, colortbl}
+\usepackage[colorlinks, linkcolor = black, citecolor = black, filecolor = black, urlcolor = black]{hyperref}
+
+\usepackage{ulem, xpatch}
+\xpatchcmd{\sout}
+{\bgroup}
+{\bgroup\def\ULthickness{1.5pt}}
+{}{}
+
+% Badge box
+\usepackage{tcolorbox}
+\newtcbox{\badge}{nobeforeafter,colframe=green,colback=green,boxrule=0.5pt,arc=4pt,
+boxsep=0pt,left=5pt,right=5pt,top=5pt,bottom=5pt,tcbox raise base,
+grow to left by=0pt,
+grow to right by=-3pt,
+enlarge top by=3pt,
+enlarge bottom by=3pt,coltext=white}
+
+% Define colors
+\definecolor{grey}{RGB}{208, 208, 208}
+\definecolor{darkgrey}{rgb}{0.6,0.6,0.6}
+\definecolor{white}{rgb}{1,1,1}
+\definecolor{ green }{RGB}{76,175,80}
+\definecolor{green}{RGB}{76,175,80}
+\definecolor{ black }{RGB}{0,0,0}
+
+% Define header
+\pagestyle{fancy}
+
+% Left header: logo
+\lhead{\includegraphics[width=5cm]{% templatetag openbrace %}{{LOGO_FILENAME}}{% templatetag closebrace %}}
+
+% Define footer
+\lfoot{Katharineum zu Lübeck}
+\cfoot{\thepage}
+\rfoot{\small Umsetzung: © 2018--2019 by Computer-AG}
+\rhead{\textbf{
+Vertretungen {{ date|date:"j. F Y, \\K\\W W"}}}\\
+Stand: {% now "j. F Y H:i" %}\\
+}
+
+\begin{document}
+    \Large
+    \subsubsection*{}
+    {#    \vspace{10pt}#}
+    \section*{\Huge Vertretungen {{ date|date:"l, j. F Y"}}}
+
+    {%  include "timetable/latex/hints.tex" %}
+
+    {% if header_info.is_box_needed %}
+    \begin{tabular}{@{}ll@{}}
+    {% for row in header_info.rows %}
+        \textbf{ {{ row.0 }} } & {{ row.1 }} \\
+    {% endfor %}
+    \end{tabular}
+    {% endif %}
+
+    % Init table
+    {% set color_background = 1 %}
+    {% set last_classes = "" %}
+
+    \def\arraystretch{1.5}
+    \begin{longtable}{p{20mm}p{8mm}p{32mm}p{25mm}p{30mm}p{45mm}}
+        \textbf{Klassen} &
+        \textbf{Std.} &
+        \textbf{Lehrer} &
+        \textbf{Fach} &
+        \textbf{Raum} &
+        \textbf{Hinweis}\\
+        \hline
+        \endhead
+        {% for sub in subs %}
+
+        {# ------------------------------ #}
+        {#  Color groups of classes in grey/white #}
+        {% if last_classes != sub.classes %}
+
+        {% if color_background %}
+        {% set color_background = 0 %}
+        {% else %}
+        {% set color_background = 1 %}
+        {% endif %}
+
+        {% endif %}
+
+        {% set last_classes = sub.classes %}
+
+
+        {# Background color #}
+        {% if color_background %}
+        \rowcolor{grey}
+        {% endif %}
+
+        {# ------------------------------ #}
+
+        {% with c=sub.color %}
+        {#  Display classes #}
+        \color{ {{c}} }
+        \textbf{ {{ sub.classes }} } &
+
+        {# Display lesson number #}
+        \color{ {{c}} }
+        {{ sub.lesson }} &
+
+        \color{ {{c}} } {% include "timetable/latex/teacher.tex" %} &
+
+        \color{ {{c}} } {% include "timetable/latex/subject.tex" %} &
+
+        \color{ {{c}} } {% include "timetable/latex/room.tex" %} &
+
+        {# Display badge (for cancellations) #}     {# Display notice and new line #}
+        {% if sub.badge %}
+        \large\badge{ {{ sub.badge }} }
+        {% endif %} \color{ {{c}} } \Large\textit{ {{sub.text|default:""}} } \\
+
+    {% endwith %}
+    {% endfor %}
+    \end{longtable}
+
+\end{document}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/latex/teacher.tex b/schoolapps/timetable/templates/timetable/latex/teacher.tex
new file mode 100644
index 0000000000000000000000000000000000000000..f4a4018d804c6b34a2afc3149cbac451c327fa39
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/latex/teacher.tex
@@ -0,0 +1,11 @@
+{% if sub.sub.type == 1 %}
+\sout{ {{ sub.sub.teacher_old.shortcode }} }
+{% elif sub.sub.teacher_new and sub.sub.teacher_old %}
+\sout{ {{ sub.sub.teacher_old.shortcode }} }
+$\rightarrow$
+\textbf{ {{ sub.sub.teacher_new.shortcode }} }
+{% elif sub.sub.teacher_new and not sub.sub.teacher_old %}
+\textbf{ {{ sub.sub.teacher_new.shortcode }} }
+{% elif sub.sub.teacher_old %}
+\textbf{ {{ sub.sub.teacher_old.shortcode }} }
+{% endif %}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/lesson.html b/schoolapps/timetable/templates/timetable/lesson.html
index 1eda3c99c009aa43eaeba34f58de7ea0f1bdcd17..610635d4bc019ffe4a8606647952783c8090de90 100644
--- a/schoolapps/timetable/templates/timetable/lesson.html
+++ b/schoolapps/timetable/templates/timetable/lesson.html
@@ -26,10 +26,12 @@
                             {# Class or room > Display teacher #}
                             {% if type == 2 or type == 1 %}
                                 {% if element_container.element.teacher %}
-                                <span data-position="bottom" class="tooltipped"
-                                      data-tooltip="{{ element_container.element.teacher }}"><a
-                                        href="{% url "timetable_smart_plan" "teacher" element_container.element.teacher.id %}">{{ element_container.element.teacher.shortcode }}</a></span>
-                                <br>
+                                    <span data-position="bottom" class="tooltipped"
+                                          data-tooltip="{{ element_container.element.teacher }}">
+                                        <a
+                                                href="{% url "timetable_smart_plan" "teacher" element_container.element.teacher.id %}">{{ element_container.element.teacher.shortcode }}</a>
+                                    </span>
+                                    <br>
                                 {% endif %}
                             {% endif %}
 
@@ -40,24 +42,24 @@
 
                         {% else %}
                             {# Display sub #}
+                            {% with sub=element_container.substitution %}
 
-                            {# Teacher or room > display classes #}
-                            {% if type == 0 or type == 1 %}
-                                {{ element_container.substitution.table.classes }}
-                            {% endif %}
+                                {# Teacher or room > display classes #}
+                                {% if type == 0 or type == 1 %}
+                                    {{ element_container.substitution.table.classes }}
+                                {% endif %}
 
-                            {# Display teacher with tooltip #}
-                            <span class="tooltipped" data-position="bottom"
-                                  data-tooltip="{{ element_container.substitution.table.teacher_full|safe }}">{{ element_container.substitution.table.teacher|safe }}</span>
+                                {# Display teacher with tooltip #}
+                                {% include "timetable/subs/teacher.html" %}
 
-                            {# Display subject #}
-                            {{ element_container.substitution.table.subject|safe }}
+                                {# Display subject #}
+                                {% include "timetable/subs/subject.html" %}
 
-                            {# Teacher or class > display room #}
-                            {% if type == 0 or type == 2 %}
-                                <span class="tooltipped" data-position="bottom"
-                                      data-tooltip="{{ element_container.substitution.table.room_full|safe }}">{{ element_container.substitution.table.room|safe }}</span>
-                            {% endif %}
+                                {# Teacher or class > display room #}
+                                {% if type == 0 or type == 2 %}
+                                    {% include "timetable/subs/room.html" %}
+                                {% endif %}
+                            {% endwith %}
                         {% endif %}<br>
 
                         {# When it isn't a room or the old plan, then display the extra text (e. g. work orders)#}
@@ -84,12 +86,12 @@
                         {# Class or room > Display teacher #}
                         {% if type == 2 or type == 1 %}
                             {% if element_container.element.teacher %}
-                            <span data-position="bottom" class="tooltipped"
-                                  data-tooltip="{{ element_container.element.teacher }}">
-                                <a href="{% url "timetable_smart_plan" "teacher" element_container.element.teacher.id %}">
-                                    {{ element_container.element.teacher.shortcode }}
-                                </a>
-                            </span>
+                                <span data-position="bottom" class="tooltipped"
+                                      data-tooltip="{{ element_container.element.teacher }}">
+                                    <a href="{% url "timetable_smart_plan" "teacher" element_container.element.teacher.id %}">
+                                        {{ element_container.element.teacher.shortcode }}
+                                    </a>
+                                </span>
                             {% endif %}
                         {% endif %}
 
@@ -100,11 +102,11 @@
                         {% if type == 0 or type == 2 %}
                             <span class="tooltipped" data-position="bottom"
                                   data-tooltip="{{ element_container.room.name }}">
-                            {% if element_container.room %}
-                                <a href="{% url "timetable_smart_plan" "room" element_container.room.id %}">
-                                    {{ element_container.room.shortcode }}
-                                </a>
-                            {% endif %}
+                                {% if element_container.room %}
+                                    <a href="{% url "timetable_smart_plan" "room" element_container.room.id %}">
+                                        {{ element_container.room.shortcode }}
+                                    </a>
+                                {% endif %}
                             </span>
                         {% endif %}
                     {% endif %}
diff --git a/schoolapps/timetable/templates/timetable/myplan.html b/schoolapps/timetable/templates/timetable/myplan.html
index 798b4a688a71df8c7774aa77ef6fb7049c05a5db..c2ae550c914935b62ddd77623a86cbeec67adee0 100644
--- a/schoolapps/timetable/templates/timetable/myplan.html
+++ b/schoolapps/timetable/templates/timetable/myplan.html
@@ -13,6 +13,11 @@
         </div>
     </div>
 
+    <div class="row nomargin">
+        <div class="col m12 s12 l6">
+            {% include "timetable/hintsinplan.html" %}
+        </div>
+    </div>
 
     <script type="text/javascript">
         var dest = "/timetable/my/";
diff --git a/schoolapps/timetable/templates/timetable/plan.html b/schoolapps/timetable/templates/timetable/plan.html
index a96c345c1390b5b3b4555afeded6f91de441ddea..1c92f10452bdb1c874e499c0474d90a4fe1e487d 100755
--- a/schoolapps/timetable/templates/timetable/plan.html
+++ b/schoolapps/timetable/templates/timetable/plan.html
@@ -117,6 +117,8 @@
         {% endif %}
     </div>
 
+    {% include "timetable/hintsinplan.html" %}
+    
     {# show full timetable on tablets, laptops and pcs #}
     <div class="timetable-plan hide-on-small-and-down">
 
diff --git a/schoolapps/timetable/templates/timetable/quicklaunch.html b/schoolapps/timetable/templates/timetable/quicklaunch.html
index 67edf305baf6d6aa2a0136d5a5c3cc6bb2959b76..2647f44c697ec19ce5c05bd8d08ebeda22b14446 100755
--- a/schoolapps/timetable/templates/timetable/quicklaunch.html
+++ b/schoolapps/timetable/templates/timetable/quicklaunch.html
@@ -1,10 +1,10 @@
 {% include 'partials/header.html' %}
 
 <main>
-    <h3>Alle Pläne</h3>
+    <h4>Alle Pläne</h4>
     <div class="row">
         <div class="col s12 m4">
-            <h4>Lehrkräfte</h4>
+            <h5>Lehrkräfte</h5>
             {% for teacher in teachers %}
                 <a class="waves-effect waves-light btn btn-timetable-quicklaunch"
                    href="{% url 'timetable_smart_plan' 'teacher' teacher.id %}">
@@ -14,7 +14,7 @@
         </div>
 
         <div class="col s12 m4">
-            <h4>Klassen</h4>
+            <h5>Klassen</h5>
 
             {% for class in classes %}
                 <a class="waves-effect waves-light btn btn-timetable-quicklaunch"
@@ -26,7 +26,7 @@
         </div>
 
         <div class="col s12 m4">
-            <h4>Räume</h4>
+            <h5>Räume</h5>
             {% for room in rooms %}
                 <a class="waves-effect waves-light btn btn-timetable-quicklaunch"
                    href="{% url 'timetable_smart_plan' 'room' room.id %}">
diff --git a/schoolapps/timetable/templates/timetable/subs/room.html b/schoolapps/timetable/templates/timetable/subs/room.html
new file mode 100644
index 0000000000000000000000000000000000000000..0d023430bcae2e8c4f0b4a99e2edb6a3ffe4a61f
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/subs/room.html
@@ -0,0 +1,36 @@
+{% if sub.sub.type == 3 %}
+    {# Supervisement #}
+    {{ sub.sub.corridor.name }}
+{% elif sub.sub.type == 1 or sub.sub.type == 2 %}
+    {# Canceled lesson: no room #}
+{% elif sub.sub.roow_new and sub.sub.room_old %}
+    {# New and old room available #}
+    <span class="tooltipped" data-position="bottom"
+          data-tooltip="{{ sub.sub.room_old.name }} → {{ sub.sub.room_new.name }}">
+        <a href="{% url "timetable_smart_plan" "room" sub.sub.room_old.id %}">
+            <s>{{ sub.sub.room_old.shortcode }}</s>
+        </a>
+        →
+        <a href="{% url "timetable_smart_plan" "room" sub.sub.room_new.id %}">
+            <strong>{{ sub.sub.room_new.shortcode }}</strong>
+        </a>
+    </span>
+{% elif sub.sub.room_new and not sub.sub.room_old %}
+    {# Only new room available #}
+    <span class="tooltipped" data-position="bottom"
+          data-tooltip="{{ sub.sub.room_new.name }}">
+        <a href="{% url "timetable_smart_plan" "room" sub.sub.room_new.id %}">
+            {{ sub.sub.room_new.shortcode }}
+        </a>
+    </span>
+{% elif not sub.sub.room_new and not sub.sub.room_old %}
+    {# Nothing to view #}
+{% else %}
+    {# Only old room available #}
+    <span class="tooltipped" data-position="bottom"
+          data-tooltip="{{ sub.sub.room_old.name }}">
+        <a href="{% url "timetable_smart_plan" "room" sub.sub.room_old.id %}">
+            {{ sub.sub.room_old.shortcode }}
+        </a>
+    </span>
+{% endif %}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/subs/subject.html b/schoolapps/timetable/templates/timetable/subs/subject.html
new file mode 100644
index 0000000000000000000000000000000000000000..84be3ef4034bb521774c23657d2fb75ed674f4c8
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/subs/subject.html
@@ -0,0 +1,13 @@
+{% if sub.sub.type == 3 %}
+    <strong>Aufsicht</strong>
+{% elif not sub.sub.subject_new and not sub.sub.subject_old %}
+{% elif sub.sub.type == 1 or sub.sub.type == 2 %}
+    <s>{{ sub.sub.subject_old.shortcode }}</s>
+{% elif sub.sub.subject_new and sub.sub.subject_old %}
+    <s>{{ sub.sub.subject_old.shortcode }}</s> →
+    <strong>{{ sub.sub.subject_new.shortcode }}</strong>
+{% elif sub.sub.subject_new and not sub.sub.subject_old %}
+    <strong>{{ sub.sub.subject_new.shortcode }}</strong>
+{% else %}
+    <strong>{{ sub.sub.subject_old.shortcode }}</strong>
+{% endif %}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/subs/teacher.html b/schoolapps/timetable/templates/timetable/subs/teacher.html
new file mode 100644
index 0000000000000000000000000000000000000000..f28e03745cf3ffba220abd979b8073a09353a52d
--- /dev/null
+++ b/schoolapps/timetable/templates/timetable/subs/teacher.html
@@ -0,0 +1,33 @@
+{% if sub.sub.type == 1 %}
+    <span class="tooltipped" data-position="bottom"
+          data-tooltip="{{ sub.sub.teacher_old.name }}">
+        <a href="{% url "timetable_smart_plan" "teacher" sub.sub.teacher_old.id %}">
+            <s>{{ sub.sub.teacher_old.shortcode }}</s>
+        </a>
+    </span>
+{% elif sub.sub.teacher_new and sub.sub.teacher_old %}
+    <span class="tooltipped" data-position="bottom"
+          data-tooltip="{{ sub.sub.teacher_old.name }} → {{ sub.sub.teacher_new.name }}">
+        <a href="{% url "timetable_smart_plan" "teacher" sub.sub.teacher_old.id %}">
+            <s>{{ sub.sub.teacher_old.shortcode }}</s>
+        </a>
+        →
+        <a href="{% url "timetable_smart_plan" "teacher" sub.sub.teacher_new.id %}">
+            <strong>{{ sub.sub.teacher_new.shortcode }}</strong>
+        </a>
+    </span>
+{% elif sub.sub.teacher_new and not sub.sub.teacher_old %}
+    <span class="tooltipped" data-position="bottom"
+          data-tooltip="{{ sub.sub.teacher_new.name }}">
+        <a href="{% url "timetable_smart_plan" "teacher" sub.sub.teacher_new.id %}">
+            <strong>{{ sub.sub.teacher_new.shortcode }}</strong>
+        </a>
+    </span>
+{% elif sub.sub.teacher_old %}
+    <span class="tooltipped" data-position="bottom"
+          data-tooltip="{{ sub.sub.teacher_old.name }}">
+        <a href="{% url "timetable_smart_plan" "teacher" sub.sub.teacher_old.id %}">
+            <strong>{{ sub.sub.teacher_old.shortcode }}</strong>
+        </a>
+    </span>
+{% endif %}
\ No newline at end of file
diff --git a/schoolapps/timetable/templates/timetable/substitution.html b/schoolapps/timetable/templates/timetable/substitution.html
index c2b34b9540b785c34f6a7930bb9d99f8b3d83f30..578c2acb76262314d40ca4402b39667733038845 100755
--- a/schoolapps/timetable/templates/timetable/substitution.html
+++ b/schoolapps/timetable/templates/timetable/substitution.html
@@ -6,28 +6,53 @@
 </script>
 
 <main>
-    <h3>Vertretungen</h3>
-
-    <div class="row no-print">
-        <div class="col s12 m6 l4 xl3">
-            {% include "timetable/datepicker.html" %}
+    <div class="row no-margin">
+        <div class="col s12 m10">
+            <h4>Vertretungen</h4>
         </div>
         <div class="col l4 xl6">
         </div>
         <div class="col s12 m6 l4 xl3 right align-right">
-            <a class="waves-effect waves-teal btn-flat btn-flat-medium right" href="{% url "timetable_substitutions_pdf %}">
+            <a class="waves-effect waves-teal btn-flat btn-flat-medium right"
+               href="{% url "timetable_substitutions_pdf" %}">
                 <i class="material-icons center">print</i>
             </a>
         </div>
     </div>
 
+    <div class="row no-print">
+        <div class="col s12 m6 l8 xl9">
+            {% if header_info.is_box_needed %}
+                <div class="card">
+                    <div class="card-content">
+                        {% for row in header_info.rows %}
+                            <div class="row no-margin">
+                                <div class="col s3">
+                                    <strong>{{ row.0 }}</strong>
+                                </div>
+                                <div class="col s9">
+                                    {{ row.1 }}
+                                </div>
+                            </div>
+                        {% endfor %}
+                    </div>
+                </div>
+            {% endif %}
+
+            {% include "timetable/hintsinsub.html" %}
+        </div>
+        <div class="col s12 m6 l4 xl3">
+            {% include "timetable/datepicker.html" %}
+        </div>
+    </div>
+
     <h5>{{ date|date:"l, j. F Y" }}</h5>
 
     <table class="substitutions striped">
         <thead>
         <tr>
+            <th><i class="material-icons">people</i></th>
             <th><i class="material-icons">access_time</i></th>
-            <th>Klassen</th>
             <th>Lehrer</th>
             <th>Fach</th>
             <th>Raum</th>
@@ -36,8 +61,15 @@
         </tr>
         </thead>
         <tbody>
+        {% if not sub_table %}
+            <td colspan="7">
+                <p class="flow-text center">
+                    Keine Vertretungen vorhanden
+                </p>
+            </td>
+        {% endif %}
         {% for sub in sub_table %}
-            <tr class="{{ sub.css_class }}">
+            <tr class="{{ sub.color }}-text">
                 <td>
                     {{ sub.classes }}
                 </td>
@@ -47,15 +79,13 @@
                     </strong>
                 </td>
                 <td>
-                    <span class="tooltipped" data-position="bottom"
-                          data-tooltip="{{ sub.teacher_full|safe }}">{{ sub.teacher|safe }}</span>
+                    {% include "timetable/subs/teacher.html" %}
                 </td>
                 <td>
-                    {{ sub.subject|safe }}
+                    {% include "timetable/subs/subject.html" %}
                 </td>
                 <td>
-                    <span class="tooltipped" data-position="bottom"
-                          data-tooltip="{{ sub.room_full|safe }}">{{ sub.room|safe }}</span>
+                    {% include "timetable/subs/room.html" %}
                 </td>
                 <td>
                     {% if sub.badge %}
diff --git a/schoolapps/timetable/templatetags/common.py b/schoolapps/timetable/templatetags/common.py
new file mode 100644
index 0000000000000000000000000000000000000000..2a33c1b04b09d620cfb07fee9fb945f5dc61067b
--- /dev/null
+++ b/schoolapps/timetable/templatetags/common.py
@@ -0,0 +1,31 @@
+from django import template
+
+register = template.Library()
+
+
+class SetVarNode(template.Node):
+
+    def __init__(self, var_name, var_value):
+        self.var_name = var_name
+        self.var_value = var_value
+
+    def render(self, context):
+        try:
+            value = template.Variable(self.var_value).resolve(context)
+        except template.VariableDoesNotExist:
+            value = ""
+        context[self.var_name] = value
+
+        return u""
+
+
+@register.tag(name='set')
+def set_var(parser, token):
+    """
+    {% set some_var = '123' %}
+    """
+    parts = token.split_contents()
+    if len(parts) < 4:
+        raise template.TemplateSyntaxError("'set' tag must be of the form: {% set <var_name> = <var_value> %}")
+
+    return SetVarNode(parts[1], parts[3])
diff --git a/schoolapps/timetable/urls.py b/schoolapps/timetable/urls.py
index 61eb454ca4df89d46680baf71cc59a56e20607d2..d21f90a1610b258c65ac1d8a1ca71ad51c187fb6 100755
--- a/schoolapps/timetable/urls.py
+++ b/schoolapps/timetable/urls.py
@@ -2,6 +2,10 @@ from django.urls import path
 from . import views
 
 urlpatterns = [
+    path('hints', views.hints, name="timetable_hints"),
+    path('hints/add', views.add_hint, name="timetable_add_hint"),
+    path('hints/<int:id>/edit', views.edit_hint, name="timetable_edit_hint"),
+    path('hints/<int:id>/delete', views.delete_hint, name="timetable_delete_hint"),
     path('', views.all, name='timetable_admin_all'),
     path('my', views.my_plan, name='timetable_my_plan'),
     path('my/<int:year>/<int:month>/<int:day>/', views.my_plan, name='timetable_my_plan'),
@@ -13,5 +17,5 @@ urlpatterns = [
          name='timetable_smart_plan_week'),
     path('substitutions/', views.substitutions, name='timetable_substitutions'),
     path('substitutions/<int:year>/<int:month>/<int:day>/', views.substitutions, name='timetable_substitutions_date'),
-    path('class.pdf', views.sub_pdf, name="timetable_substitutions_pdf")
+    path('class.pdf', views.sub_pdf, name="timetable_substitutions_pdf"),
 ]
diff --git a/schoolapps/timetable/views.py b/schoolapps/timetable/views.py
index 971456b71cf26cbd4728208860043305d1667faa..312fc4cb0ad4d70165bbf0a8ca31cd17dc9a5935 100755
--- a/schoolapps/timetable/views.py
+++ b/schoolapps/timetable/views.py
@@ -1,13 +1,19 @@
 import datetime
 import os
+import traceback
 
 from PyPDF2 import PdfFileMerger
 from django.contrib.auth.decorators import login_required, permission_required
 from django.http import Http404, FileResponse
-from django.shortcuts import render, redirect
+from django.shortcuts import render, redirect, get_object_or_404
 from django.utils import timezone
 
+from debug.models import register_traceback, register_return_0
 from schoolapps.settings import SHORT_WEEK_DAYS, LONG_WEEK_DAYS
+from timetable.filters import HintFilter
+from timetable.forms import HintForm
+from timetable.hints import get_all_hints_by_time_period, get_all_hints_by_class_and_time_period, \
+    get_all_hints_for_teachers_by_time_period, get_all_hints_not_for_teachers_by_time_period
 from timetable.pdf import generate_class_tex, generate_pdf
 
 from untisconnect.plan import get_plan, TYPE_TEACHER, TYPE_CLASS, TYPE_ROOM, parse_lesson_times
@@ -17,6 +23,12 @@ from userinformation import UserInformation
 
 from schoolapps.settings import BASE_DIR
 
+from .models import Hint
+
+
+####################
+# HELPER FUNCTIONS #
+####################
 
 def get_all_context():
     teachers = get_all_teachers()
@@ -32,20 +44,6 @@ def get_all_context():
     return context
 
 
-@login_required
-@permission_required("timetable.show_plan")
-def all(request):
-    context = get_all_context()
-    return render(request, 'timetable/all.html', context)
-
-
-@login_required
-@permission_required("timetable.show_plan")
-def quicklaunch(request):
-    context = get_all_context()
-    return render(request, 'timetable/quicklaunch.html', context)
-
-
 def get_calendar_weeks(year=timezone.datetime.now().year):
     weeks = []
 
@@ -78,32 +76,110 @@ def get_calendar_week(calendar_week, year=timezone.datetime.now().year):
     return None
 
 
+def get_next_weekday(date):
+    """Get the next weekday by a datetime object"""
+
+    if date.isoweekday() in {6, 7}:
+        if date.isoweekday() == 6:
+            plus = 2
+        else:
+            plus = 1
+        date += datetime.timedelta(days=plus)
+    return date
+
+
+#############
+# OVERVIEWS #
+#############
+
+@login_required
+@permission_required("timetable.show_plan")
+def all(request):
+    """
+    [DJANGO VIEW]
+    Show all plans as collection
+    :param request: Django request
+    :return: rendered template
+    """
+    context = get_all_context()
+    return render(request, 'timetable/all.html', context)
+
+
+@login_required
+@permission_required("timetable.show_plan")
+def quicklaunch(request):
+    """
+    [DJANGO VIEW]
+    Show all plans as buttons
+    :param request: Django request
+    :return: rendered template
+    """
+    context = get_all_context()
+    return render(request, 'timetable/quicklaunch.html', context)
+
+
+#########
+# PLANS #
+#########
+
 @login_required
 @permission_required("timetable.show_plan")
 def plan(request, plan_type, plan_id, regular="", year=timezone.datetime.now().year,
          calendar_week=timezone.datetime.now().isocalendar()[1]):
+    """
+    [DJANGO VIEW]
+    Show a timetable (class, teacher, room, smart/regular)
+    :param request: Django requests
+    :param plan_type: "teacher", "class" or "room"
+    :param plan_id: UNTIS-ID of corresponding object
+    :param regular: regular plan = True, smart plan = False
+    :param year: year of plan (only for smart plan)
+    :param calendar_week: calendar week in year (only for smart plan)
+    :return:
+    """
+
+    # Regular or smart plan?
     if regular == "regular":
         smart = False
     else:
         smart = True
 
+    # Get monday and friday of week
     monday_of_week = get_calendar_week(calendar_week, year)["first_day"]
-    # print(monday_of_week)
+    friday = monday_of_week + datetime.timedelta(days=4)
+
+    # Init hints
+    hints = None
+    hints_b = None
 
     if plan_type == 'teacher':
+        # Teacher
         _type = TYPE_TEACHER
         el = get_teacher_by_id(plan_id)
+
+        # Get hints
+        if smart:
+            hints = list(get_all_hints_for_teachers_by_time_period(monday_of_week, friday))
+            hints_b = list(get_all_hints_not_for_teachers_by_time_period(monday_of_week, friday))
+
     elif plan_type == 'class':
+        # Class
         _type = TYPE_CLASS
         el = get_class_by_id(plan_id)
+
+        # Get hints
+        if smart:
+            hints = list(get_all_hints_by_class_and_time_period(el, monday_of_week, friday))
+
     elif plan_type == 'room':
+        # Room
         _type = TYPE_ROOM
         el = get_room_by_id(plan_id)
     else:
         raise Http404('Plan not found.')
 
+    # Get plan
     plan = get_plan(_type, plan_id, smart=smart, monday_of_week=monday_of_week)
-    # print(parse_lesson_times())
 
     context = {
         "smart": smart,
@@ -118,6 +194,9 @@ def plan(request, plan_type, plan_id, regular="", year=timezone.datetime.now().y
         "selected_year": year,
         "short_week_days": SHORT_WEEK_DAYS,
         "long_week_days": LONG_WEEK_DAYS,
+        "hints": hints,
+        "hints_b": hints_b,
+        "hints_b_mode": "week",
     }
 
     return render(request, 'timetable/plan.html', context)
@@ -125,7 +204,7 @@ def plan(request, plan_type, plan_id, regular="", year=timezone.datetime.now().y
 
 @login_required
 @permission_required("timetable.show_plan")
-def my_plan(request, year=None, day=None, month=None):
+def my_plan(request, year=None, month=None, day=None):
     date = timezone.datetime.now()
     if year is not None and day is not None and month is not None:
         date = timezone.datetime(year=year, month=month, day=day)
@@ -135,31 +214,43 @@ def my_plan(request, year=None, day=None, month=None):
     if next_weekday != date:
         return redirect("timetable_my_plan", next_weekday.year, next_weekday.month, next_weekday.day)
 
+    # Get calendar week and monday of week
     calendar_week = date.isocalendar()[1]
     monday_of_week = get_calendar_week(calendar_week, date.year)["first_day"]
 
+    # Get user type (student, teacher, etc.)
     _type = UserInformation.user_type(request.user)
 
     if _type == UserInformation.TEACHER:
+        # Teacher
         _type = TYPE_TEACHER
         shortcode = request.user.username
         el = get_teacher_by_shortcode(shortcode)
         plan_id = el.id
         raw_type = "teacher"
-        # print(el)
+
+        # Get hints
+        hints = list(get_all_hints_for_teachers_by_time_period(date, date))
+        hints_b = list(get_all_hints_not_for_teachers_by_time_period(date, date))
+
     elif _type == UserInformation.STUDENT:
+        # Student
         _type = TYPE_CLASS
         _name = UserInformation.user_classes(request.user)[0]
-        # print(_name)
         el = get_class_by_name(_name)
         plan_id = el.id
         raw_type = "class"
+
+        # Get hints
+        hints = list(get_all_hints_by_class_and_time_period(el, date, date))
+        hints_b = None
+
     else:
+        # No student or teacher > no my plan
         return redirect("timetable_admin_all")
-    # print(monday_of_week)
 
+    # Get plan
     plan = get_plan(_type, plan_id, smart=True, monday_of_week=monday_of_week)
-    # print(parse_lesson_times())
 
     context = {
         "type": _type,
@@ -171,24 +262,18 @@ def my_plan(request, year=None, day=None, month=None):
         "week_day": date.isoweekday() - 1,
         "date": date,
         "date_js": int(date.timestamp()) * 1000,
-        "display_date_only": True
+        "display_date_only": True,
+        "hints": hints,
+        "hints_b": hints_b,
+        "hints_b_mode": "day",
     }
-    # print(context["week_day"])
 
     return render(request, 'timetable/myplan.html', context)
 
 
-def get_next_weekday(date):
-    """Get the next weekday by a datetime object"""
-
-    if date.isoweekday() in {6, 7}:
-        if date.isoweekday() == 6:
-            plus = 2
-        else:
-            plus = 1
-        date += datetime.timedelta(days=plus)
-    return date
-
+#################
+# SUBSTITUTIONS #
+#################
 
 def sub_pdf(request):
     """Show substitutions as PDF for the next weekday (specially for monitors)"""
@@ -197,7 +282,7 @@ def sub_pdf(request):
     today = timezone.datetime.now()
 
     first_day = get_next_weekday(today)
-    second_day = get_next_weekday(today + datetime.timedelta(days=1))
+    second_day = get_next_weekday(first_day + datetime.timedelta(days=1))
 
     # Get subs and generate table
     for i, date in enumerate([first_day, second_day]):
@@ -205,24 +290,34 @@ def sub_pdf(request):
         subs = get_substitutions_by_date(date)
         sub_table = generate_sub_table(subs)
         header_info = get_header_information(subs, date)
-        
+        hints = list(get_all_hints_by_time_period(date, date))
+
+        # latex = convert_markdown_2_latex(hints[0].text)
+        # print(latex)
         # Generate LaTeX
-        tex = generate_class_tex(sub_table, date, header_info)
+        tex = generate_class_tex(sub_table, date, header_info, hints)
 
         # Generate PDF
         generate_pdf(tex, "class{}".format(i))
 
     # Merge PDFs
-    merger = PdfFileMerger()
-    class0 = open(os.path.join(BASE_DIR, "latex", "class0.pdf"), "rb")
-    class1 = open(os.path.join(BASE_DIR, "latex", "class1.pdf"), "rb")
-    merger.append(fileobj=class0)
-    merger.append(fileobj=class1)
-
-    # Write merged PDF to class.pdf
-    output = open(os.path.join(BASE_DIR, "latex", "class.pdf"), "wb")
-    merger.write(output)
-    output.close()
+    try:
+        merger = PdfFileMerger()
+        class0 = open(os.path.join(BASE_DIR, "latex", "class0.pdf"), "rb")
+        class1 = open(os.path.join(BASE_DIR, "latex", "class1.pdf"), "rb")
+        merger.append(fileobj=class0)
+        merger.append(fileobj=class1)
+
+        # Write merged PDF to class.pdf
+        output = open(os.path.join(BASE_DIR, "latex", "class.pdf"), "wb")
+        merger.write(output)
+        output.close()
+
+        # Register successful merge in debugging tool
+        register_return_0("merge_class", "pypdf2")
+    except Exception:
+        # Register exception in debugging tool
+        register_traceback("merge_class", "pypdf2")
 
     # Read and response PDF
     file = open(os.path.join(BASE_DIR, "latex", "class.pdf"), "rb")
@@ -231,22 +326,94 @@ def sub_pdf(request):
 
 @login_required
 @permission_required("timetable.show_plan")
-def substitutions(request, year=None, day=None, month=None):
+def substitutions(request, year=None, month=None, day=None):
     """Show substitutions in a classic view"""
 
     date = timezone.datetime.now()
     if year is not None and day is not None and month is not None:
         date = timezone.datetime(year=year, month=month, day=day)
 
+    # Get next weekday if it is a weekend
+    next_weekday = get_next_weekday(date)
+    if next_weekday != date:
+        return redirect("timetable_substitutions_date", next_weekday.year, next_weekday.month, next_weekday.day)
+
     # Get subs and generate table
     subs = get_substitutions_by_date(date)
     sub_table = generate_sub_table(subs)
 
+    # Get header information and hints
+    header_info = get_header_information(subs, date)
+    hints = list(get_all_hints_by_time_period(date, date))
+
     context = {
         "subs": subs,
         "sub_table": sub_table,
         "date": date,
-        "date_js": int(date.timestamp()) * 1000
+        "date_js": int(date.timestamp()) * 1000,
+        "header_info": header_info,
+        "hints": hints,
     }
 
     return render(request, 'timetable/substitution.html', context)
+
+
+###################
+# HINT MANAGEMENT #
+###################
+
+@login_required
+@permission_required("timetable.can_view_hint")
+def hints(request):
+    f = HintFilter(request.GET, queryset=Hint.objects.all())
+    msg = None
+    if request.session.get("msg", False):
+        msg = request.session["msg"]
+        request.session["msg"] = None
+    return render(request, "timetable/hints.html", {"f": f, "msg": msg})
+
+
+@login_required
+@permission_required('timetable.can_add_hint')
+def add_hint(request):
+    msg = None
+    if request.method == 'POST':
+        form = HintForm(request.POST)
+
+        if form.is_valid():
+            i = form.save()
+            i.save()
+            # return redirect('timetable_add_hint')
+            form = HintForm()
+            msg = "success"
+    else:
+        form = HintForm()
+
+    return render(request, 'timetable/hintform.html', {'form': form, "martor": True, "msg": msg, "mode": "new"})
+
+
+@login_required
+@permission_required("timetable.can_edit_hint")
+def edit_hint(request, id):
+    hint = get_object_or_404(Hint, pk=id)
+    if request.method == 'POST':
+        form = HintForm(request.POST, instance=hint)
+
+        if form.is_valid():
+            i = form.save()
+            i.save()
+            request.session["msg"] = "success_edit"
+            return redirect('timetable_hints')
+    else:
+        form = HintForm(instance=hint)
+
+    return render(request, 'timetable/hintform.html', {'form': form, "martor": True, "mode": "edit"})
+
+
+@login_required
+@permission_required("timetable.can_delete_hint")
+def delete_hint(request, id):
+    hint = get_object_or_404(Hint, pk=id)
+    hint.delete()
+    request.session["msg"] = "success_delete"
+    return redirect('timetable_hints')
diff --git a/schoolapps/untisconnect/api.py b/schoolapps/untisconnect/api.py
index 446158d962abb7d56a6dd540aea642035a8e6c97..0d0a89fd6ab7bb8734b59f06da9571a3f7e0c469 100755
--- a/schoolapps/untisconnect/api.py
+++ b/schoolapps/untisconnect/api.py
@@ -2,7 +2,7 @@ from django.conf import settings
 
 from untisconnect.api_helper import get_term_by_id, run_using, untis_date_to_date, date_to_untis_date
 from . import models
-from timetable import models as models2
+from timetable.settings import untis_settings
 
 
 def run_all(obj, filter_term=True):
@@ -15,7 +15,7 @@ def run_one(obj, filter_term=True):
 
 def run_default_filter(obj, filter_term=True):
     # Get term by settings in db
-    TERM_ID = models2.untis_settings.term
+    TERM_ID = untis_settings.term
     TERM = get_term_by_id(TERM_ID)
     SCHOOL_ID = TERM.school_id  # 705103
     SCHOOLYEAR_ID = TERM.schoolyear_id  # 20172018
@@ -158,10 +158,10 @@ def format_classes(classes):
         else:
             classes_as_dict[step].append(part)
 
-    out = ""
+    out = []
     for key, value in classes_as_dict.items():
-        out += key + "".join(value)
-    return out
+        out.append(key + "".join(value))
+    return ", ".join(out)
 
 
 ########
diff --git a/schoolapps/untisconnect/plan.py b/schoolapps/untisconnect/plan.py
index c87e0431769000c7f698110e9d216914f71b2132..a6065a048e7a9cc526a679e36cd7d2b19afb30e4 100644
--- a/schoolapps/untisconnect/plan.py
+++ b/schoolapps/untisconnect/plan.py
@@ -184,6 +184,10 @@ def get_plan(type, id, smart=False, monday_of_week=None):
                             if sub["sub"].teacher_new.id == id:
                                 found = True
 
+                        if sub["sub"].teacher_old:
+                            if sub["sub"].teacher_old.id == id:
+                                found = True
+
                     elif type == TYPE_ROOM:
                         if sub["sub"].room_new:
                             if sub["sub"].room_new.id == id:
diff --git a/schoolapps/untisconnect/sub.py b/schoolapps/untisconnect/sub.py
index ef8ba86ca7d0137059dfc9f56015654049349010..81a8b0abc72efb00dea1decbe17dd4e6393b25b0 100644
--- a/schoolapps/untisconnect/sub.py
+++ b/schoolapps/untisconnect/sub.py
@@ -12,6 +12,12 @@ TYPE_CORRIDOR = 3
 
 
 def parse_type_of_untis_flags(flags):
+    """
+    Get type of substitution by parsing UNTIS flags
+    :param flags: UNTIS flags (string)
+    :return: type (int, constants are provided)
+    """
+
     type_ = TYPE_SUBSTITUTION
     if "E" in flags:
         type_ = TYPE_CANCELLATION
@@ -20,6 +26,7 @@ def parse_type_of_untis_flags(flags):
     return type_
 
 
+# Build cache
 drive = build_drive()
 
 
@@ -51,6 +58,8 @@ class Substitution(object):
 
     def create(self, db_obj):
         self.filled = True
+
+        # Metadata
         self.id = db_obj.substitution_id
         self.lesson_id = db_obj.lesson_idsubst
         self.date = untis_date_to_date(db_obj.date)
@@ -58,10 +67,7 @@ class Substitution(object):
         self.type = parse_type_of_untis_flags(db_obj.flags)
         self.text = db_obj.text
 
-        # Lesson
-
         # Teacher
-        # print(db_obj.teacher_idlessn)
         if db_obj.teacher_idlessn != 0:
             self.teacher_old = drive["teachers"][db_obj.teacher_idlessn]
 
@@ -77,8 +83,7 @@ class Substitution(object):
 
         self.lesson_element, self.room_old = get_lesson_element_by_id_and_teacher(self.lesson_id, self.teacher_old,
                                                                                   self.lesson, self.date.weekday() + 1)
-        # print(self.lesson)
-        # print(self.room_old)
+
         # Subject
         self.subject_old = self.lesson_element.subject if self.lesson_element is not None else None
         if db_obj.subject_idsubst != 0:
@@ -88,35 +93,32 @@ class Substitution(object):
                 self.subject_new = None
 
         # Room
-        # self.rooms_old = self.lesson_element.rooms if self.lesson_element is not None else []
-        # if len(self.rooms_old) >= 1:
-        #     self.room_old = self.rooms_old[0]
-
         if db_obj.room_idsubst != 0:
             self.room_new = drive["rooms"][db_obj.room_idsubst]
 
             if self.room_old is not None and self.room_old.id == self.room_new.id:
                 self.room_new = None
-        # if self.rooms_old
 
-        # print(self.room_new)
-        # print("CORRIDOR")
-        # print(self.corridor)
+        # Supervisement
         if db_obj.corridor_id != 0:
             self.corridor = drive["corridors"][db_obj.corridor_id]
             self.type = TYPE_CORRIDOR
-        # Classes
 
+        # Classes
         self.classes = []
         class_ids = untis_split_first(db_obj.classids, conv=int)
 
-        # print(class_ids)
         for id in class_ids:
             self.classes.append(drive["classes"][id])
-        # print(self.classes)
 
 
 def substitutions_sorter(sub):
+    """
+    Sorting helper (sort function) for substitutions
+    :param sub: Substitution to sort
+    :return: A string for sorting by
+    """
+
     # First, sort by class
     sort_by = "".join(class_.name for class_ in sub.classes)
 
@@ -132,6 +134,7 @@ def substitutions_sorter(sub):
 
 class SubRow(object):
     def __init__(self):
+        self.sub = None
         self.color = "black"
         self.css_class = "black-text"
         self.lesson = ""
@@ -147,7 +150,6 @@ class SubRow(object):
 
 
 def generate_teacher_row(sub, full=False):
-    # print(sub.id)
     teacher = ""
     if sub.type == 1:
         teacher = "<s>{}</s>".format(sub.teacher_old.shortcode if not full else sub.teacher_old.name)
@@ -203,10 +205,18 @@ def generate_room_row(sub, full=False):
 
 
 def generate_sub_table(subs):
+    """
+    Parse substitutions and prepare than for displaying in plan
+    :param subs: Substitutions to parse
+    :return: A list of SubRow objects
+    """
+
     sub_rows = []
     for sub in subs:
         sub_row = SubRow()
+        sub_row.sub = sub
 
+        # Color
         sub_row.color = "black"
         if sub.type == 1 or sub.type == 2:
             sub_row.css_class = "green-text"
@@ -215,13 +225,13 @@ def generate_sub_table(subs):
             sub_row.css_class = "blue-text"
             sub_row.color = "blue"
 
+        #  Format lesson
         if sub.type == 3:
-            sub_row.lesson = "{}./{}".format(sub.lesson - 1, sub.lesson)
+            sub_row.lesson = "{}./{}.".format(sub.lesson - 1, sub.lesson)
         else:
             sub_row.lesson = "{}.".format(sub.lesson)
 
-        # for class_ in sub.classes:
-        #     sub_row.classes += class_.name
+        # Classes
         sub_row.classes = format_classes(sub.classes)
 
         sub_row.teacher = generate_teacher_row(sub)
@@ -231,21 +241,17 @@ def generate_sub_table(subs):
         sub_row.room = generate_room_row(sub)
         sub_row.room_full = generate_room_row(sub, full=True)
 
-        # if DEBUG:
-        #     # Add id only if debug mode is on
-        #     if sub.text:
-        #         sub_row.text = sub.text + " " + str(sub.id)
-        #     else:
-        #         sub_row.text = str(sub.id)
-        # else:
+        # Hint text
         sub_row.text = sub.text
 
+        # Badge
         sub_row.badge = None
         if sub.type == 1:
             sub_row.badge = "Schüler frei"
         elif sub.type == 2:
             sub_row.badge = "Lehrer frei"
 
+        # Debugging information
         sub_row.extra = "{} {}".format(sub.id, sub.lesson_id)
 
         sub_rows.append(sub_row)