Calculated Industries 3058 GradeMatic 4000 Grade averages for up to 99 grades per student and 99 students per class Work in any grading format (percent score, GPA, 4.0, 5.0, 12.0 or total) Work in both letter and number grade averages (without converting) Grade "weighting", custom grade scales, acts as a stopwatch/timer Full One Year Warranty