diff --git a/manuels/admin.py b/manuels/admin.py
index 8dee69e..3fc91ef 100644
--- a/manuels/admin.py
+++ b/manuels/admin.py
@@ -26,9 +26,15 @@ class TeacherAdmin(ExportMixin, admin.ModelAdmin):
     actions = [send_link]
 
 
+class TeacherResource(resources.ModelResource):
+    class Meta:
+        model = Teacher
+        fields = ('first_name', 'last_name', 'email', 'phone_number')
+
+
 @admin.register(Level)
 class LevelAdmin(admin.ModelAdmin):
-    list_display = ['name', 'order', 'consumable_count', 'consumable_price']
+    list_display = ['name', 'order', 'book_count', 'consumable_count', 'consumable_price']
     list_editable = ['order']
     list_display_links = ['name']
 
@@ -36,6 +42,10 @@ class LevelAdmin(admin.ModelAdmin):
         return obj.consumable_count
     consumable_count.short_description = 'Nombre de consommable(s)'
 
+    def book_count(self, obj: Level):
+        return obj.book_set.count()
+    book_count.short_description = 'Nombre de livre(s)'
+
     def consumable_price(self, obj: Level):
         return f'{obj.consumable_price:.2f}€'
     consumable_price.short_description = 'Coût des consommables'