NCTM has provided another valuable resource for elementary and middle school math teachers with the addition of Calculation Nation to their website. These online games focus on topics such as fractions, perimeter, factors, angles, etc. Players can join as guests or create an account to play against other Calculation Nation members. If you want to have your child playing intelligent games while they are on the computer check out Calculation Nation.
http://calculationnation.nctm.org
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