(Grades 1-4). Replaces traditional flashcards! Students answer equations by adding, subtracting, multiplying or dividing a number on the outside of the disc by the number in the middle. Just insert a pencil through the hole and flip the disc over to self-check the answer. Each set includes 12 two-sided Flashdiscs covering facts 1-12. Constructed of durable, easy-to-clean plastic.