If you are looking at a way to support the Common Core State Standards in Math, look no further that Math Playground that has aligned their engaging games and Thinking Blocks to the Common Core math standards.
Math Playground is an action packed math site for elementary and middle school students featuring math games, math word problems, math worksheets, logic puzzles, and math videos. The perfect site to include when universally-designing your math lessons.
This link brings you to the Grade 4 alignment but if you click on "Back to Menu", you will locate links to the other grades.
Via Kathleen McClaskey