This site gives a variety of information about, well, how things work. Check it out!
Ever needed to find information that was directly related to education and not a video of a monkey riding a bike? Khan academy is a great place for just that.
Great math-based site for finding all kind of information for projects. The great thing about it is, it is not socially engineered like other search engines (google).
A great site listing all kind of cool stuff Google offers....FOR FREE!!!!!!
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