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Online Conversion
Conversion calculators galore! Convert just about anything from one measureable unit into another measureable unit here with over two dozen calculators. Each of the links is specific to a measureable quantity. Some examples include...
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Mark Chris Soft: The History of Computing
This time line shows the development of computing from Schlckard's 1623 Calculating Clock to the launch of Microsoft Windows 95.
NASA
Nasa Star Child: Planet Hop
Figure out your age and your weight on all the planets in the solar system using the formulas given here. Then type them into the correct place, and let the computer check to see if you are correct.
National Health Museum
Access Excellence: Using Probeware in Biology
This article discusses knowledge and skills developed by educators who use technology to teach science.