A directory of useful objects found on the web for teaching Maths.
http://mathsclass.net/comments/investigating-scientific-notation
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An investigation of some real objects using Wolfram Alpha. The worksheets formed the basis of the investigation looking at the mass of a grain of rice, the diameter of the earth, the speed of light and the distance to Proxima Centauri (the star closest to earth).
28 February 2012 Edit: 30 October 2017
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