Great websites to practice math skills
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http://xtramath.org/signin/classroom
https://www.ixl.com/signin/aims
http://www.sheppardsoftware.com/math.htm
http://www.coolmath-games.com/0-math-lines/
http://www.coolmath-games.com/0-number-twins/
http://illuminations.nctm.org/Activity.aspx?id=3565
http://www.learningbox.com/base10/baseten.html
http://www.ictgames.com/sharkNumbers/sharkNumbers_v5.html
http://www.brainpop.com/games/battleshipnumberline/
http://www.oswego.org/ocsd-web/games/dogbone/gamebone.html