The term "school grades" refers to a system used by educational institutions to evaluate and assess students' academic performance. Grading systems vary from school to school, but typically involve assigning numerical values or letter grades based on various criteria such as exams, quizzes, homework assignments, class participation, and overall achievement in a course or subject. These grades are used by teachers, parents, and students themselves to track progress, identify areas for improvement, and determine eligibility for academic honors or recognition.