diff --git a/backend/app/coordinator/routes/__init__.py b/backend/app/coordinator/routes/__init__.py
index 2f39af8..6da1701 100644
--- a/backend/app/coordinator/routes/__init__.py
+++ b/backend/app/coordinator/routes/__init__.py
@@ -1,9 +1,11 @@
 from flask import Blueprint
 
 from .students import bp as students_bp
+from .project_supervisor import bp as project_supervisor_bp
 from .groups import bp as groups_bp
 
 bp = Blueprint("coordinator", __name__, url_prefix="/coordinator")
 
 bp.register_blueprint(students_bp)
+bp.register_blueprint(project_supervisor_bp)
 bp.register_blueprint(groups_bp)
diff --git a/backend/app/coordinator/routes/project_supervisor.py b/backend/app/coordinator/routes/project_supervisor.py
index 3caf9f5..c8bd0a2 100644
--- a/backend/app/coordinator/routes/project_supervisor.py
+++ b/backend/app/coordinator/routes/project_supervisor.py
@@ -44,8 +44,7 @@ def create_project_supervisor(data: dict) -> dict:
     email = data['email']
     limit_group = data['limit_group']
     mode = data['mode']
-
-    project_supervisor = ProjectSupervisor.query.filter(first_name=first_name).filter(last_name=last_name).first()
+    project_supervisor = ProjectSupervisor.query.filter_by(first_name=first_name).filter_by(last_name=last_name).first()
     if project_supervisor is not None:
         abort(400, "Project Supervisor has already exists!")
     
diff --git a/backend/app/coordinator/schemas.py b/backend/app/coordinator/schemas.py
index d6ab649..419cbc9 100644
--- a/backend/app/coordinator/schemas.py
+++ b/backend/app/coordinator/schemas.py
@@ -108,8 +108,8 @@ class ProjectSupervisorsPaginationSchema(ma.Schema):
 class ProjectSupervisorCreateSchema(ma.Schema):
     first_name = fields.Str(validate=validate.Length(min=1, max=255), required=True)
     last_name = fields.Str(validate=validate.Length(min=1, max=255), required=True)
-    email = fields.Str(validate=validate.Length(min=0, max=11), required=True)
-    limit_group = fields.Integer(validate=validate_index)
+    email = fields.Str(validate=validate.Length(min=1, max=255), required=True)
+    limit_group = fields.Integer()
     mode = fields.Integer(required=True)
 
 
diff --git a/frontend/src/api/leaders.ts b/frontend/src/api/leaders.ts
index 6210960..bffa38e 100644
--- a/frontend/src/api/leaders.ts
+++ b/frontend/src/api/leaders.ts
@@ -27,15 +27,15 @@ export const getLeaders = (
   }> = {},
 ) =>
   axiosInstance.get<LeaderResponse>(
-    'http://127.0.0.1:5000/api/coordinator/project_supervisors',
+    'http://127.0.0.1:5000/api/coordinator/project_supervisor',
     { params },
   )
 
 export const createLeader = (payload: Leader) =>
-  axiosInstance.post('http://127.0.0.1:5000/api/coordinator/project_supervisors/', payload)
+  axiosInstance.post('http://127.0.0.1:5000/api/coordinator/project_supervisor/', payload)
 
 
 export const deleteLeader = (payload: Number) =>
   axiosInstance.delete(
-    'http://127.0.0.1:5000/api/coordinator/project_supervisors/'+payload.toString()+'/',
+    'http://127.0.0.1:5000/api/coordinator/project_supervisor/'+payload.toString()+'/',
   )
diff --git a/frontend/src/views/coordinator/AddLeader.tsx b/frontend/src/views/coordinator/AddLeader.tsx
index aa1bb62..30503c2 100644
--- a/frontend/src/views/coordinator/AddLeader.tsx
+++ b/frontend/src/views/coordinator/AddLeader.tsx
@@ -25,7 +25,6 @@ const AddLeader = () => {
   )
 
   const onSubmit = (data: Leader) => {
-    console.log(data)
     mutateCreateLeader(data)
   }
 
@@ -36,7 +35,7 @@ const AddLeader = () => {
     >
       {isAlertVisible && (
         <div className="alert alert-success shadow-lg">
-          <span>Udało się dodać studenta!</span>
+          <span>Udało się dodać opiekuna!</span>
         </div>
       )}
 
diff --git a/frontend/src/views/coordinator/Leaders.tsx b/frontend/src/views/coordinator/Leaders.tsx
index 1b7df01..cf471cc 100644
--- a/frontend/src/views/coordinator/Leaders.tsx
+++ b/frontend/src/views/coordinator/Leaders.tsx
@@ -86,6 +86,7 @@ const Leaders = () => {
                       <td>{last_name}</td>
                       <td>{email}</td>
                       <td>{limit_group}</td>
+                      <td>{count_group}</td>
                       <td>{mode==0 ? "Stacjonarny" : mode==1 ? "Niestacjonarny" : "Nie/stacjonarny"}</td>
                       <td><button onClick={() => deleteLeader(id).then(() => refetchLeaders())}>X</button></td>
                     </tr>