public function assign()
 {
     $users = User::lists('name', 'id');
     $schools = Schools::lists('school_name', 'id');
     $departments = Departments::lists('department_name', 'id');
     $designations = Designations::lists('designation', 'id');
     return view('Designation.assign', compact('schools', 'departments', 'designations', 'users'));
 }