diff --git a/pyBuchaktion/admin.py b/pyBuchaktion/admin.py
index c4d36ad..41286bd 100644
--- a/pyBuchaktion/admin.py
+++ b/pyBuchaktion/admin.py
@@ -449,6 +449,7 @@ class OrderTimeframeAdmin(ModelAdmin):
         'end_date',
         'start_date',
         'semester',
+        'student_count',
     )
 
     form = OrderTimeframeForm
diff --git a/pyBuchaktion/models.py b/pyBuchaktion/models.py
index 20e5111..f3f127f 100644
--- a/pyBuchaktion/models.py
+++ b/pyBuchaktion/models.py
@@ -403,6 +403,9 @@ def __str__(self):
     def natural_key(self):
         return { "from": self.start_date, "to": self.end_date }
 
+    def student_count(self):
+        return self.order_set.values('student').distinct().count()
+
     # Set the singular and plural names for i18n
     class Meta:
         verbose_name = _("order timeframe")