diff --git a/backend/app/coordinator/routes/groups.py b/backend/app/coordinator/routes/groups.py
index 4bb42e1..72b4035 100644
--- a/backend/app/coordinator/routes/groups.py
+++ b/backend/app/coordinator/routes/groups.py
@@ -65,9 +65,9 @@ def create_group(data: dict) -> dict:
     db.session.commit()
 
     students = db.session.query(Student).filter(Student.index.in_(students_indexes)).all()
+    project_supervisor.count_groups += 1
     for student in students:
         student.group_id = group.id
-        project_supervisor.count_groups += 1
 
     db.session.commit()
 
@@ -89,6 +89,14 @@ def delete_group(id: int) -> dict:
     group = Group.query.filter_by(id=id).first()
     if group is None:
         abort(400, f"Group with id {id} doesn't exist!")
+
+    project_supervisor = ProjectSupervisor.query.filter_by(id=group.project_supervisor_id).first()
+    project_supervisor.count_groups -= 1
+
+    students = db.session.query(Student).filter_by(group_id=id).all()
+    for student in students:
+        student.group_id = None
+
     db.session.delete(group)
     db.session.commit()
     return {"message": "Group was deleted!"}
diff --git a/backend/app/coordinator/routes/project_supervisor.py b/backend/app/coordinator/routes/project_supervisor.py
index ddeeda7..4605d0c 100644
--- a/backend/app/coordinator/routes/project_supervisor.py
+++ b/backend/app/coordinator/routes/project_supervisor.py
@@ -69,8 +69,9 @@ def delete_project_supervisor(id: int) -> dict:
         abort(400, f"Project Supervisor with id {id} doesn't exist!")
 
     count_groups = db.session.query(db.func.count(ProjectSupervisor.id)).join(Group).\
-        filter(ProjectSupervisor.id == id).group_by(ProjectSupervisor.id).scalar()
-    if count_groups > 0:
+        filter(ProjectSupervisor.id == id).group_by(ProjectSupervisor.id)
+    
+    if count_groups is not None:
         abort(400, f"Project Supervisor with id {id} has gropus!")
 
     db.session.delete(project_supervisor)
diff --git a/frontend/src/api/groups.ts b/frontend/src/api/groups.ts
index faa6b0b..8119472 100644
--- a/frontend/src/api/groups.ts
+++ b/frontend/src/api/groups.ts
@@ -34,3 +34,8 @@ export const getGroups = (
 
 export const createGroup = (payload: CreateGroup) =>
   axiosInstance.post('http://127.0.0.1:5000/api/coordinator/groups/', payload)
+
+  export const deleteGroup = (id: number) =>
+  axiosInstance.delete(
+    `http://127.0.0.1:5000/api/coordinator/groups/${id}/`,
+  )
\ No newline at end of file
diff --git a/frontend/src/views/coordinator/AddGroup.tsx b/frontend/src/views/coordinator/AddGroup.tsx
index a92d154..2f70125 100644
--- a/frontend/src/views/coordinator/AddGroup.tsx
+++ b/frontend/src/views/coordinator/AddGroup.tsx
@@ -29,7 +29,8 @@ const AddGroup = () => {
     {
       onSuccess: (data) => {
         setStudentOptions(
-          data?.data.students.map(({ first_name, last_name, index }) => {
+          data?.data.students.filter(st => st.group === null)
+            .map(({ first_name, last_name, index }) => {
             return {
               value: index,
               label: `${first_name} ${last_name} (${index})`,
@@ -45,7 +46,7 @@ const AddGroup = () => {
     {
       onSuccess: (data) => {
         setSupervisorOptions(
-          data?.data.project_supervisors.map(
+          data?.data.project_supervisors.filter(ld => ld.count_groups < ld.limit_group).map(
             ({ id, first_name, last_name }) => ({
               value: id,
               label: `${first_name} ${last_name}`,
diff --git a/frontend/src/views/coordinator/Groups.tsx b/frontend/src/views/coordinator/Groups.tsx
index e1579f3..8894d15 100644
--- a/frontend/src/views/coordinator/Groups.tsx
+++ b/frontend/src/views/coordinator/Groups.tsx
@@ -1,26 +1,75 @@
-import { useQuery } from 'react-query'
+import classNames from 'classnames'
+import { useEffect, useState } from 'react'
+import { useMutation, useQuery } from 'react-query'
 import { useNavigate } from 'react-router-dom'
-import { getGroups } from '../../api/groups'
+import { deleteGroup, getGroups } from '../../api/groups'
 
 const Groups = () => {
   let navigate = useNavigate()
+  const [page, setPage] = useState(1)
+  const [perPage, setPerPage] = useState(10)
 
-  const { isLoading: areGroupsLoading, data: groups } = useQuery(
-    ['groups'],
-    () => getGroups({ per_page: 1000 }),
+  const perPageOptions = [
+    {
+      value: 10,
+      label: '10 rekordów',
+    },
+    {
+      value: 20,
+      label: '20 rekordów',
+    },
+    {
+      value: 50,
+      label: '50 rekordów',
+    },
+    {
+      value: 1000,
+      label: 'Pokaż wszystkie',
+    },
+  ]
+
+  const {
+    isLoading: areGroupsLoading,
+    data: groups,
+    refetch: refetchGroups,
+  } = useQuery(['groups', page, perPage], () =>
+    getGroups({ page, per_page: perPage }),
   )
 
+  const { mutate: mutateDelete } = useMutation(
+    'deleteGroup',
+    (index: number) => deleteGroup(index),
+    {
+      onSuccess: () => refetchGroups(),
+    },
+  )
+  
+  useEffect(() => {
+    setPage(1)
+  }, [perPage])
+  
   if (areGroupsLoading) {
     return <div>Ładowanie</div>
   }
   return (
     <div>
-      <button
-        className="btn btn-success"
-        onClick={() => navigate('/coordinator/add-group')}
-      >
-        Dodaj nową grupę
-      </button>
+      <div className="flex items-center justify-between flex-col gap-3 md:flex-row md:gap-0">
+        <button
+          className="btn btn-success"
+          onClick={() => navigate('/coordinator/add-group')}
+        >
+          Dodaj nową grupę
+        </button>
+        <div className="flex">
+          <select className="select select-xs md:select-md select-bordered mr-3">
+            {perPageOptions.map(({ value, label }) => (
+              <option key={value} onClick={() => setPerPage(value)}>
+                {label}
+              </option>
+            ))}
+          </select>
+        </div>
+      </div>
       <div className="flex mx-auto mt-5 overflow-hidden overflow-x-auto border border-gray-100 rounded">
         <table className="min-w-full table table-compact">
           <thead>
@@ -29,6 +78,7 @@ const Groups = () => {
               <th>Opiekun</th>
               <th>Semestr 1</th>
               <th>Semestr 2</th>
+              <th></th>
             </tr>
           </thead>
           <tbody className="divide-y divide-gray-100">
@@ -47,12 +97,50 @@ const Groups = () => {
                   </td>
                   <td>{points_for_first_term}</td>
                   <td>{points_for_second_term}</td>
+                  <td>
+                    <button onClick={() => mutateDelete(id)}>X</button>
+                  </td>
                 </tr>
               ),
             )}
           </tbody>
         </table>
       </div>
+      <div className="w-full flex items-center justify-center mt-2">
+            <div className="btn-group">
+              <button
+                className="btn btn-outline"
+                onClick={() => setPage(page - 1)}
+                disabled={page === 1}
+              >
+                «
+              </button>
+              {[
+                ...Array(
+                  groups?.data?.max_pages && groups?.data?.max_pages + 1,
+                ).keys(),
+              ]
+                .slice(1)
+                .map((p) => (
+                  <button
+                    key={p}
+                    className={classNames('btn btn-outline', {
+                      'bg-success': p === page,
+                    })}
+                    onClick={() => setPage(p)}
+                  >
+                    {p}
+                  </button>
+                ))}
+              <button
+                className="btn btn-outline"
+                onClick={() => setPage(page + 1)}
+                disabled={page === groups?.data?.max_pages}
+              >
+                »
+              </button>
+            </div>
+          </div>
     </div>
   )
 }