Khan Academy has over 3,300 videos covering K-12 math, science topics such as biology, chemistry, and physics, and even finance and history. .
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 am the parent of a high functioning autistic child. The available services at my son's school could not reach him. He cannot learn in a large group setting but the small group learning available was way below his skill level. This left him feeling stupid and discouraged. It makes me wonder how many kids are like him. With Khan Academy his math skills are blossoming but more importantly, his confidence in his academic abilities is growing by leaps and bounds. My mom, a retired math teacher, is beyond impressed with Khan Academy."
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