public JsonResult GetTeachersRemaningCreditAndTotalCredit(int teachersId)
        {
            var getTeachersRemaningCreditAndTotalCredit = courseAssignManager.GetTeachersRemaningCreditAndTotalCredit(teachersId);

            return(Json(getTeachersRemaningCreditAndTotalCredit, JsonRequestBehavior.AllowGet));
        }