public function getGradesByDivisionAndTeacher(TblDivision $tblDivision, TblPerson $tblPersonTeacher, TblPerson $tblPersonStudent, TblGradeType $tblGradeType)
    {

        return $this->getCachedEntityListBy(__METHOD__, $this->getEntityManager(), 'TblGrade', array(
            TblGrade::ATTR_SERVICE_TBL_DIVISION => $tblDivision->getId(),