To allow full functionality at MathGames you must whitelist *.mathgames.com
Here are whitelisting instructions for major companies:
Light Speed Systems: http://community.lightspeedsystems.com/documentation/how-to-allow-and-block-websites/
General Audit Tool: https://generalaudittool.com/tag/whitelist/
If you don't see your software program listed, please search for how to whitelist with your program's name.