The Khan Academy - YES WE KHAN!
For the most cutting-edge, mind-expanding help with understanding math (as well as many other subjects), there is no place like the Academy.
Step 1: Log-in to Google Docs through the ASD web portal: https://docs.google.com/a/asdk12.net/#home
Step 2: Click on this link: http://www.khanacademy.org/login and if your name appears at the top of the page
Step 3: Go to the Common Core page and find your grade level. Choose activities that are at your grade level before going into other levels. You are ready to go! Enjoy earning those energy points and badges! Remember, watching the videos earns you points too...