public function getGradeLetter()
 {
     $grade = false;
     $grade_letters = $this->course->getGradeLetters();
     if ($this->grade_data) {
         $grade = $this->grade_data->finalgrade;
     }
     if ($grade && $grade != '') {
         return GcrEschoolTable::getLetterGrade($grade, $grade_letters);
     }
     return false;
 }
 public function getAverageGradeLetter()
 {
     $grade_letters = array('93' => 'A', '90' => 'A-', '87' => 'B+', '83' => 'B', '80' => 'B-', '77' => 'C+', '73' => 'C', '70' => 'C-', '67' => 'D+', '60' => 'D', '0' => 'F');
     return GcrEschoolTable::getLetterGrade($this->totals['average_grade'], $grade_letters);
 }