Academic Earth - Lectures from some of the top scholars on the planet. If your English is really good, you'll never leave your computer after you go to this site. All free.
TED - Riveting talks by remarkable people. Free to the world.
Khan Academy - You'll find a very large library of videos for subjects ranging from math to science to history. Very popular! Even Bill Gate's kids go to this website for help with math assignments.
Academic Info - Academic Info is an online education resource center with extensive subject guides and distance learning information.
Learnfree.org - A great website for anyone who wants to learn basic math and computer skills. Wow!!
FreeMathWorksheets - Practice basic math, fractions, and algebra by using these worksheets. Worksheets are available with answers.