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Illuminations
This site, created by the National Council of Teachers of Mathematics, contains LOTS of lessons, games, and interactive activities for many mathematic concepts. The Factor Game is a great place to start :)
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Khan Academy
Free resource! Create an account and earn badges as you learn skills, gain practice, and become an expert on any topic you choose.
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Multiplication Facts Practice
Online game to increase speed and accuracy with multiplication facts
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Sheppard Software
Find extra practice and tutorials for whatever math concept you need.
