www.khanacademy.org Start learning now Completely free, forever.

Start learning now

Completely free, forever.

A free world-class education for anyone anywhere.

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.

How it works for students

Students can make use of our extensive library of content, including interactive challenges, assessments, and videos from any computer with access to the web.

Coaches, parents, and teachers

Coaches, parents, and teachers have unprecedented visibility into what their students are learning and doing on Khan Academy.

A world of skills to practice, with help along the way

Practice math at your own pace with our adaptive assessment environment. You can start at 1 + 1 and work your way into calculus or jump right into whatever topic needs some brushing up.

Each problem is randomly generated, so you never run out of practice material. If you need a hint, every single problem can be broken down, step-by-step, with one click. If you need more help, you can always watch a related video.

 www.khanacademy.org