Khan Academy

The Khan Academy is a not-for-profit 501(c)(3) with the mission of providing a world-class education to anyone, anywhere.

We are complementing Salman’s ever-growing library with user-paced exercises–developed as an open source project–allowing the Khan Academy to become the free classroom for the World.

Log in to the Khan Academy web application for user-paced practice and instruction

via Khan Academy.

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