Mathematics

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Graphing Function - Online []

Android App Scientific Calculator - Wabbitemu []

Downloadable Scientific and Graphing Calc from Microsoft....2-D and 3-D enabled. []

Tools
Virtual Graph Paper []

Tutorials
Khan Academy Math []

The Math Guy Audio Archive (NPR) [|http://www.stanford.edu/~kdevlin/MathGuy.html]

Wolfram Alpha []