Khan Academy is a revolutionary approach to teaching which advocates “Flipping the Classroom”. You can view the TED video below to learn about the humble beginnings of the Academy on YouTube, and the ambitious plans Mr. Khan now has for his free service. Basically, the site has hundreds of video lessons indexed in which Mr. Khan explains a variety of topics – mostly math and science related. If you have a G-mail or Facebook account, you can become a Coach. Your students, who would also have to register with one of these e-mail addresses, can complete exercises on the site at their own pace. As the Coach, you can monitor their progress using several different tools included in the registration portion of the site. Even if you don’t want to register, this is a fabulous resource for allowing students to learn at their own pace, or even for reteaching and reviewing topics.