A great alternative to flash cards, math-fact-oh!™ builds and reinforces basic math skills while improving memory and concentration! For every solution card there are three corresponding equation cards that compose a triangle called a 'math-fact-oh!™ Players compete to be the first to create the math-fact-oh! sets by locating the addition and subtraction problem cards that match their solution cards. For grades K+. This product ships in approximately 1 days