добавил проверку кол-во учителей > 2

project/views.py

@@ -105,7 +105,8 @@ class IndexView(TemplateView):
         shuffle(review_images)
         teachers = User.objects.filter(
             role=User.TEACHER_ROLE, show_in_mainpage=True)
-        if teachers.count() % 2 == 0:
+
+        if teachers.count() % 2 == 0 and teachers.count() > 2:
             teachers = teachers[:teachers.count() - 1]
 
         context.update({