diff --git a/site_eica/site_eica/settings.py b/site_eica/site_eica/settings.py
index 9f91e6e..7b37674 100644
--- a/site_eica/site_eica/settings.py
+++ b/site_eica/site_eica/settings.py
@@ -106,7 +106,7 @@ AUTH_PASSWORD_VALIDATORS = [
 
 LANGUAGE_CODE = 'fr-fr'
 
-TIME_ZONE = 'EUROPE/Brussels'
+TIME_ZONE = 'Europe/Brussels'
 
 USE_I18N = True
 
diff --git a/site_eica/valves/admin.py b/site_eica/valves/admin.py
index 0496ff5..773000b 100644
--- a/site_eica/valves/admin.py
+++ b/site_eica/valves/admin.py
@@ -5,14 +5,34 @@ from .models import Classe, Eleve, Message, Resultat
 
 class ResultatInline(admin.TabularInline):
     model = Resultat
-    extra = 1
+    extra = 0
+    classes = ["collapse"]
+
+class MessageInline(admin.TabularInline):
+    model = Message
+    extra = 0
+
 
 class EleveAdmin(admin.ModelAdmin):
     list_display = ['nom_eleve', 'prenom_eleve']
 
 class ClasseAdmin(admin.ModelAdmin):
+    fieldsets = (
+        (None, {
+            "fields": (
+                [('nom_classe','annee_scolaire'),'code_acces']
+            ),
+        }),
+        ('Élèves', {
+            "fields": (
+                ['eleves']
+            ),
+            "classes": ["collapse"],
+        })
+    )
+    
     filter_horizontal = ('eleves',) 
-    inlines = [ResultatInline]
+    inlines = [ResultatInline, MessageInline]
  
 admin.site.register(Eleve, EleveAdmin)
 admin.site.register(Classe, ClasseAdmin)
diff --git a/site_eica/valves/migrations/0002_auto_20211027_1021.py b/site_eica/valves/migrations/0002_auto_20211027_1021.py
new file mode 100644
index 0000000..d47fccc
--- /dev/null
+++ b/site_eica/valves/migrations/0002_auto_20211027_1021.py
@@ -0,0 +1,45 @@
+# Generated by Django 3.2.8 on 2021-10-27 08:21
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('valves', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='classe',
+            name='nom_annee',
+        ),
+        migrations.AddField(
+            model_name='classe',
+            name='nom_classe',
+            field=models.CharField(default='classe exemple', max_length=50, verbose_name='Nom de la classe'),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='message',
+            name='classe',
+            field=models.ForeignKey(default=1, on_delete=django.db.models.deletion.CASCADE, to='valves.classe', verbose_name='classe'),
+            preserve_default=False,
+        ),
+        migrations.AlterField(
+            model_name='classe',
+            name='annee_scolaire',
+            field=models.CharField(max_length=10, verbose_name='Année scolaire'),
+        ),
+        migrations.AlterField(
+            model_name='eleve',
+            name='phone',
+            field=models.CharField(max_length=13, verbose_name='Numéro de GSM'),
+        ),
+        migrations.AlterField(
+            model_name='message',
+            name='contenu_message',
+            field=models.CharField(max_length=160, verbose_name='Contenu du message'),
+        ),
+    ]
diff --git a/site_eica/valves/models.py b/site_eica/valves/models.py
index 0c137aa..8148011 100644
--- a/site_eica/valves/models.py
+++ b/site_eica/valves/models.py
@@ -1,12 +1,11 @@
 from django.db import models
-from django.db.models.deletion import CASCADE
 
 # Create your models here.
 
 class Eleve(models.Model):
     nom_eleve = models.CharField("Nom de l'élève", max_length=50)
     prenom_eleve = models.CharField("Prénom de l'élève", max_length=100)
-    phone = models.IntegerField("Numéro de téléphone")
+    phone = models.CharField("Numéro de GSM", max_length=13) # ex de numéro de GSM = 0032475123432 
         
     def __str__(self) :
         return self.nom_eleve
@@ -14,15 +13,15 @@ class Eleve(models.Model):
         
 class Classe(models.Model):
     eleves = models.ManyToManyField(Eleve)
-    nom_annee = models.CharField("Nom de l'année", max_length=50)
-    annee_scolaire = models.CharField("Année scolaire", max_length=100)
+    nom_classe = models.CharField("Nom de la classe", max_length=50)
+    annee_scolaire = models.CharField("Année scolaire", max_length=10)
     code_acces = models.CharField("Code d'accès", max_length=10)
        
     def __str__(self):
-        return self.nom_annee
+        return self.nom_classe
 
 class Resultat(models.Model):
-    res_classe = models.ForeignKey(Classe, on_delete=CASCADE)
+    res_classe = models.ForeignKey(Classe, on_delete=models.CASCADE)
     nom_resultat = models.CharField("Nom du résultat", max_length=100)
     fichier_resultat = models.FileField("Fichier")
     date_resultat = models.DateField()
@@ -33,8 +32,10 @@ class Resultat(models.Model):
 
 class Message(models.Model):
     nom_message =models.CharField("Nom du message", max_length=100)
-    contenu_message = models.CharField("Contenu du message", max_length=200)
+    contenu_message = models.CharField("Contenu du message", max_length=160) # longueur d'un SMS classique
     envoye = models.BooleanField("Envoyé")
+    # un message appartient à une classe
+    classe = models.ForeignKey("valves.Classe", verbose_name="classe", on_delete=models.CASCADE)
 
     def __str__(self) :
         return self.nom_message
\ No newline at end of file