Kids learn to make sense of numbers with self-checking cards that show related equations on front and back, Simple to use: spin the wheel to create an equation; find the answer on back and work that equation, too; then spin for the next number and begin again, Supports NCTM math standards. <em>Multiplication</em> and division facts through 12, Self-checking design on 5" circles. 12-card set contains over 240 equations