Khan Academy is attempting to revolutionize online education. They currently host over 2,700 instructional videos free for you to use.
From their about page —
“The Khan Academy is an organization on a mission. We’re a not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere.
“All of the site’s resources are available to anyone. It doesn’t matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get a leg up in earthly biology. The Khan Academy’s materials and resources are available to you completely free of charge.”
I referred a student to their huge selection of Algebra videos today, but there’s a lot more there than just math. However, if you need a free online source to help you brush up on your math or statistics skills you might want to check it out.