AlltheInterweb's Internet Directory
Maths:
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Coolmath.com - An amusement park of math and more...
URL: http://www.coolmath.com/
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Math Reference Project - An electronic archive of mathematical information. Topics range from high school geometry up to graduate level topology, and (almost) everything in between.
URL: http://www.mathreference.com/
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Math.com - The world of Maths online
URL: http://www.math.com/
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TurtleZen - Time, Distance, Speed Calculator - Online calculator to work out Time / Distance / Speed calculations.
URL: http://www.turtlezen.com/timedistancespeed.html