Pre Algebra Flipper is a handy tools are great for reference and review.
Pre Algebra Flipper contains 25 laminated cards hanging down from a sturdy plastic backing. Each has holes in the side to mount beside your desk, at the front of the “classroom,” or another convenient spot.
Run your finger down the topic words, flip up the appropriate card, and the desired information is at your fingertips. More detailed descriptions accompany some of the flippers under appropriate subject headings.