Grenville Grader Plus - Version 3.53 Grenville Grader Plus is a teachers' gradebook with lots of features and is easy to use. Handles class size of 90 students and unlimited number of test scores. Spreadsheet data entry, statistical measures, graphs, lots of reports, auto-dialer, notes editor and lesson planner, online help. 640K, VGA video required, hard drive required, mouse optional. Manual included.