Submitted by Howard, from Portland, OR, who is not affiliated with the site.
What started out as Sal Kahn making a few algebra videos for his cousins has grown to over 2,100 videos and exercises and assessments covering everything from arithmetic to physics, finance, and history. While there isn’t a URL for just the math videos, they are easy to navigate to, with the drop down menu. Includes all levels of math from basic arithmetic to calculus.
Click to visit Kahn Academy
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