I'm sure that all of you have encountered a situation where no matter how you tried to explain a concept to a student, they still struggled with it.  Or, maybe your experience was with a student who needed an extra challenge.  Or, perhaps you need a quick review for yourself.  Wouldn't it be great if there was a resource that could meet all of these needs?  It turns out that there is.

The Khan Academy is a collection of over 1400 YouTube videos covering topics such as basic arithmetic and algebra to differential equations, physics, chemistry, biology, finance, French history, and…

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