This document discusses the grading system used to classify student performance. It identifies 9 letter grades from A+ to E that are used to assess students based on percentage ranges of their marks. Each letter grade is assigned a grade value from 1 to 9 and corresponds to a different level of performance or category, with A+ being outstanding for 90-100% and E being need improvement for less than 20%. The grading system is used to classify learners according to their results.