public ActionResult Groups(GroupsVM groupsVM)
 {
     if (!(String.IsNullOrEmpty(groupsVM.NewGroupName)))
     {
         _teacherService.CreateGroup(groupsVM.NewGroupName);
         return(RedirectToAction("Groups", new { myGroups = groupsVM.MyGroups }));
     }
     else
     {
         return(View());
     }
 }