I was reminded tonight of one of my all-time favorite websites for learning about practically anything — HowStuffWorks.com. We've used this site to learn about atoms, the stock market, the inner workings of a toilet, and even guns and ammo. Not only are the articles well-written and easy-to-understand, many include animations to help demonstrate concepts, which is something you don't get from a regular encyclopedia.
So hop on over to How Stuff Works, bookmark it, and visit it often. You'll be so glad you did!
What is your favorite educational website?