Backpack TV. Backpack TV is a video site that is creating libraries of free academic videos arranged according to subject area, topic, and video length. This week they added a bunch of new libraries. Backpack TV now offers videos aligned to commonly used Algebra, Biology, and Calculus textbooks. And according to the email I received from them, there are plans for more topics and textbooks to be added in the future.
Applications for Education
If you're looking for some video content to support the textbooks that you have in your mathematics or science department, take a look at Backpack TV.