Khan Academy has over 3,300 videos covering K-12 math, science topics such as biology, chemistry, and physics, and even finance and history. .
This page contains content licensed under a creative commons license from the organization's website here.

Khan Academy's mission is to provide free, world-class education to anyone, anywhere. With thousands of videos and step-by-step problems, their online materials cover subjects ranging from math and finance to history and art.

One user says, "I've been in classes to get my high school diploma. I'm 42 years old. Before I heard about Khan Academy I took a pre test and scored 64% on it. After hearing about the site I have been using it in class and at home. I retook the test and scored 96% on it. This is the results from using the Khan Academy site for a month or less. I really appreciate all of Khan Academy's hard work and dedication to helping students and adults who are in school. Thank You."

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