e-Learning for Kids

As a secondary school teacher, I'm always looking for some cool sites that have games for kids that can help make their instruction a little more fun--some games they can play during down time or built-in differentiation time to continue their learning. I found the following site that contains some well done Flash games that have some rich content that is displayed in an interesting way.

http://www.e-learningforkids.org/courses.html

The site calls the games courses, but these are not really courses at all. I thought these games would work well with F2F instruction and supplement the concepts. The math and language arts games are good, but the health games are phenomenal.