diff --git a/biscuit/apps/alsijil/templates/alsijil/group_week.html b/biscuit/apps/alsijil/templates/alsijil/group_week.html
index ae51de99e9c9486b8dbda5f9b8d28bed72b99fca..a620f1fa9ef361b54a6bb6cf69d26a2e7119324c 100644
--- a/biscuit/apps/alsijil/templates/alsijil/group_week.html
+++ b/biscuit/apps/alsijil/templates/alsijil/group_week.html
@@ -39,7 +39,13 @@
               </thead>
               <tbody>
                 {% for period in periods %}
-                  <tr>
+                  <tr class="
+                    {% if period.has_documentation %}
+                      table-success
+                    {% else %}
+                      table-warning
+                    {% endif %}
+                  ">
                     <td>{{ period.period.period }}</td>
                     <td>
                       <a href="{% url 'lesson_by_week_and_period' week period.id %}">