private function saveAdmissionData($member_id, $data_to_save)
 {
     /**
      * 
      * static for student
      * @var int
      */
     $department_id = $data_to_save['department_id'];
     $student_model = new Core_Model_Member_Student();
     $admission = array('member_id' => $member_id, 'alloted_branch' => $department_id);
     $student_model->setMember_id($member_id);
     return $student_model->saveAdmissionInfo($admission);
 }