WOW! Kahn Academy is amazing! I think there is a full High School education in there, complete with lectures, practice problems, and badges to show what you've got! I love it! AND BEST of all,,,, free,,,, :love::love::love:
I love the math portion of the site. I haven't delved into the rest of it. But will be doing so this year! AWESOME site. I can't believe it's free.