This product is available as part of a discounted bundle A simple and fun little card game to exercise quick-fire, spontaneous positive and negative calculation of positive and negative integers. We have included a set of rules of play, but they are highly customisable for your needs. The game is also easily and quickly prepared for play with one student, all the way up to an entire classroom. A simpler game of Calculation Switch! is also available. It explores the addition and subtraction of ONLY positive integers in sequence. Check out our bundle of 5 games to buy these games together at a cheaper price overall. FIVE card games for the price of THREE. Click here to see the Bundle. If you have any comments or suggestions, and to stay updated please follow us or take a look at our Facebook Page Please click here to visit our website for more information about LittleStreams