The Khan Academy - Chemistry: Videos on chemistry (roughly covering a first-year high school or college course).
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 for 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. Khan Academy's materials and resources are available to you completely free of charge.
Students can make use of our extensive video library, interactive challenges, and assessments from any computer with access to the web.