Ten Marks www.tenmarks.com is an online math program for practice and learning. They offer a summer program and a program throughout the year.
Math-U-See www.mathusee.com is a math curriculum that teaches addition, subtraction, multiplication, division, fractions, decimals and pre-algebra through calculus.
Starfall www.starfall.com uses a phonics approach to reading and is a wonderful resource for K-2 reading.
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