I came across this site recently: Academic Earth. Now, I’m guessing that most homeschooling moms are autodidacts, but these are useful for the kids, too. For example, my 12 year-old son is very interested in science, and while I can find lots of interesting books for him about advanced science, being able to point him to college level lectures from top colleges is pretty exciting. (And I’m spending my spare time listening to lectures, too!)

Another site I recently found is The Teaching Company. They aren’t free, but their courses are outstanding. They’re available in audio CD, DVD and audio download.  They are pretty pricey – too pricey for me at their regular prices – but they always have many courses on sale, and if you have one in mind, check back every month and eventually, it’ll be on sale, too.