Here are 12 great resources for teaching and learning about health, nutrition and exercise. If you know of other great ones, add them in the comment sections.
RefSeek's guide to the 25 best online resources for finding free educational videos. With the exception of BrainPOP and Cosmeo, all listed sites offer their extensive video libraries for free and without registration.
"No matter how much you know, there is always something new to learn about science. While your college courses may cover the basics, you can get a more in-depth look at a wide variety of topics from Internet resources such as these great documentaries. These selections will help you explore everything from the inner reaches of the human mind to the outer areas of our universe and just about everything else in between. Better yet, they're all free to watch online so you can learn more without spending a dime."