diff --git a/README.md b/README.md
index d807762..8d6ae50 100644
--- a/README.md
+++ b/README.md
@@ -78,4 +78,11 @@ symfony console d:f:l
 Pas de commandes, juste du code dans AtelierController
 
 ### Question 10 et 11
-Pas de commandes.
\ No newline at end of file
+Pas de commandes.
+
+### Question 12
+```bash
+symfony console make:entity
+symfony console make:migration
+symfony console d:m:m
+```
\ No newline at end of file
diff --git a/migrations/Version20230209092109.php b/migrations/Version20230209092109.php
new file mode 100644
index 0000000..fc17dda
--- /dev/null
+++ b/migrations/Version20230209092109.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20230209092109 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE TABLE user_atelier (user_id INTEGER NOT NULL, atelier_id INTEGER NOT NULL, PRIMARY KEY(user_id, atelier_id), CONSTRAINT FK_B9B60629A76ED395 FOREIGN KEY (user_id) REFERENCES user (id) ON DELETE CASCADE NOT DEFERRABLE INITIALLY IMMEDIATE, CONSTRAINT FK_B9B6062982E2CF35 FOREIGN KEY (atelier_id) REFERENCES atelier (id) ON DELETE CASCADE NOT DEFERRABLE INITIALLY IMMEDIATE)');
+        $this->addSql('CREATE INDEX IDX_B9B60629A76ED395 ON user_atelier (user_id)');
+        $this->addSql('CREATE INDEX IDX_B9B6062982E2CF35 ON user_atelier (atelier_id)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP TABLE user_atelier');
+    }
+}
diff --git a/src/Entity/Atelier.php b/src/Entity/Atelier.php
index 1bbe61e..2035da6 100644
--- a/src/Entity/Atelier.php
+++ b/src/Entity/Atelier.php
@@ -3,6 +3,8 @@
 namespace App\Entity;
 
 use App\Repository\AtelierRepository;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 
 #[ORM\Entity(repositoryClass: AtelierRepository::class)]
@@ -19,10 +21,18 @@ class Atelier
     #[ORM\Column(length: 1024, nullable: true)]
     private ?string $description = null;
 
-    #[ORM\ManyToOne(inversedBy: 'ateliersFormÃÃÃes')]
+    #[ORM\ManyToOne(inversedBy: 'ateliersForm���es')]
     #[ORM\JoinColumn(nullable: false)]
     private ?User $instructeur = null;
 
+    #[ORM\ManyToMany(targetEntity: User::class, mappedBy: 'formationsSuivies')]
+    private Collection $eleves;
+
+    public function __construct()
+    {
+        $this->eleves = new ArrayCollection();
+    }
+
     public function getId(): ?int
     {
         return $this->id;
@@ -63,4 +73,31 @@ class Atelier
 
         return $this;
     }
+
+    /**
+     * @return Collection<int, User>
+     */
+    public function getEleves(): Collection
+    {
+        return $this->eleves;
+    }
+
+    public function addEleve(User $eleve): self
+    {
+        if (!$this->eleves->contains($eleve)) {
+            $this->eleves->add($eleve);
+            $eleve->addFormationsSuivie($this);
+        }
+
+        return $this;
+    }
+
+    public function removeEleve(User $eleve): self
+    {
+        if ($this->eleves->removeElement($eleve)) {
+            $eleve->removeFormationsSuivie($this);
+        }
+
+        return $this;
+    }
 }
diff --git a/src/Entity/User.php b/src/Entity/User.php
index 507d85b..98739b6 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -38,11 +38,15 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
     private ?string $prenom = null;
 
     #[ORM\OneToMany(mappedBy: 'instructeur', targetEntity: Atelier::class, orphanRemoval: true)]
-    private Collection $ateliersFormÃÃÃes;
+    private Collection $ateliersForm���es;
+
+    #[ORM\ManyToMany(targetEntity: atelier::class, inversedBy: 'eleves')]
+    private Collection $formationsSuivies;
 
     public function __construct()
     {
-        $this->ateliersFormÃÃÃes = new ArrayCollection();
+        $this->ateliersForm���es = new ArrayCollection();
+        $this->formationsSuivies = new ArrayCollection();
     }
 
     public function getId(): ?int
@@ -143,15 +147,15 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
     /**
      * @return Collection<int, Atelier>
      */
-    public function getAteliersFormÃÃÃes(): Collection
+    public function getAteliersForm���es(): Collection
     {
-        return $this->ateliersFormÃÃÃes;
+        return $this->ateliersForm���es;
     }
 
     public function addAteliersFormE(Atelier $ateliersFormE): self
     {
-        if (!$this->ateliersFormÃÃÃes->contains($ateliersFormE)) {
-            $this->ateliersFormÃÃÃes->add($ateliersFormE);
+        if (!$this->ateliersForm���es->contains($ateliersFormE)) {
+            $this->ateliersForm���es->add($ateliersFormE);
             $ateliersFormE->setInstructeur($this);
         }
 
@@ -160,7 +164,7 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
 
     public function removeAteliersFormE(Atelier $ateliersFormE): self
     {
-        if ($this->ateliersFormÃÃÃes->removeElement($ateliersFormE)) {
+        if ($this->ateliersForm���es->removeElement($ateliersFormE)) {
             // set the owning side to null (unless already changed)
             if ($ateliersFormE->getInstructeur() === $this) {
                 $ateliersFormE->setInstructeur(null);
@@ -169,4 +173,28 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
 
         return $this;
     }
+
+    /**
+     * @return Collection<int, atelier>
+     */
+    public function getFormationsSuivies(): Collection
+    {
+        return $this->formationsSuivies;
+    }
+
+    public function addFormationsSuivie(atelier $formationsSuivie): self
+    {
+        if (!$this->formationsSuivies->contains($formationsSuivie)) {
+            $this->formationsSuivies->add($formationsSuivie);
+        }
+
+        return $this;
+    }
+
+    public function removeFormationsSuivie(atelier $formationsSuivie): self
+    {
+        $this->formationsSuivies->removeElement($formationsSuivie);
+
+        return $this;
+    }
 }