This document plus diskette product provides nine interactive puzzles and games that both teach and provide practice with simple addition and subtraction concepts. The activities address these skills through carrying in addition and regrouping in subtraction. The activities address cognitive skills such as problem solving, planning, visual pattern recognition, and construction skills. Most of the games do not require students to have mastered the arithmetic facts presented in order to solve the problems. Rather, students discover mathematical concepts through engaging in the activities and puzzles. Students are provided with many different opportunities to practice their addition and subtraction skills in new ways. The printed user's guide discusses learning objectives; overview of the activities and their educational goals; teacher options; game features, such as pull down menus, control buttons, and scoreboard; and the nine individual games. The nine games are: Arithmetic Blocks; Spokes; Simon Adds; A Maze Thing; TenPins; TeenPins; Carry It; Adding Scales; and ArithmeSnakes. (MKR)