The Khan Academy  
The Khan Academy is a nonprofit organization where you can watch over 3000 educational videos for free. Topics include K-12 math, biology, chemistry, physics, finances, history, and more. They also have practice exercises and assessments.

The videos are short, especially made for internet viewing. In the math videos, you are looking at a blackboard. The instructor writes out the problem while talking you through it. In the other subject areas, there are often pictures accompanying the lesson. The videos have a comment section at the end for viewers to ask questions.

Use this site for homework help or educational recreation! For more homework help, ckick here.

Check out this video from Khan Academy:

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