The term "grade math" refers to a type of mathematics that is used in grading or evaluating students' work. It involves using mathematical formulas and calculations to determine grades based on various criteria, such as test scores, homework assignments, quizzes, projects, and class participation. Grade math can also involve converting letter grades into numerical values (e.g., an A is equivalent to a 90-100%), calculating averages or percentiles, and determining final course grades based on the accumulation of various assessments throughout the semester.