The present invention provides a handheld device for aiding students in solving mathematical problems. Rather than solving the problem for the student it provides a graphical environment where students can step through the solution process exactly as they would on paper. The invention monitors the solution process, reinforcing correct steps, pointing out errors in incorrect steps, and providing hints or help as required. The invention simply enforces the hard and fast rules of arithmetic and mathematics as the student performs steps in solving a problem and notifies the student when those rules are violated. This approach is in sharp contrast to other calculators which can only solve problems (or pieces of problems) for the student.
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