School grades are a system used to evaluate a student's academic performance. They typically range from A to F, with A being the highest and F indicating failure. Grades are often based on tests, assignments, and class participation, providing a way for teachers to assess how well students understand the material. Grades can also influence a student's future opportunities, such as eligibility for scholarships or admission to colleges. In many educational systems, grades are reported on a report card, which is shared with students and their families to track progress throughout the school year.