You MUST have PalmOS 3.5 or Later version AND ThinkDB2.5/Dataviz SmartList To Go (or Later) to run GradeBook on Palm PDAs. Tracks up to 20 grades per pupil in 2 subgroups for each class, and 10 absences per pupil. Ideal for semester/quarter systems. Properly calculates average scores by student-grade- and filters (if any). Unlimited classes and students are permitted. Support for MS Access and free upgrades available for registered users. SuperGradeBook, offering unlimited courses, grades, and students, available from publisher.