The document discusses grading in education systems. It provides details on:
1) The history of grading, beginning in 1785 at Yale University where grades were recorded as "Optimi", "second Optimi", and "Inferiores".
2) How grades are calculated today, including using letter grades, percentages, and grade point averages (GPA). GPA is used to assess students' performance over time.
3) International standards for grading and examples of grading systems from countries like the Philippines. The Philippines bases its system on models from Spain and the U.S. but has since developed its own system.