This unique set of flash cards makes possible an orderly, time-saving review system for upper-grade math, English, science, and social studies concepts. They are designed to cover a range of grades from 6 through 10. The cards are coded for subject and pack divisions. Answers are in small text on the back of each card. Ideas and suggestions for how to use the cards are included with each set. There are 250 double-sided 6"×8" cards, complete with a compact, wooden holding rack.