HEATKEYS

Convert between various measurement units, weight to volume and volume to weight. Unit definitions. Volume, area, gravel and mortgage calculators.

International System Of Units SI Understanding Basic Metric American measurement

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus. Infoplease.com contains facts on all subjects including sports, entertainment, techno...

Purplemath contains practical algebra lessons demonstrating useful techniques and pointing out common errors. Lessons are written with the struggling student in mind, and stress the practicalites over the technicalities. Links and other resources als...

From MIT. Information on Emerging Technologies & impact on business & society

The Khan Academy is a not-for-profit 501(c)(3) with the mission of providing a world-class education to anyone, anywhere. Despite being the work of one man, Salman Khan, this 1600+ video library is the most-used educational video resource as measure...

There have been many, potentially, very valuable inventions that have been killed by the long arms of the oil companies if the invention threatened their profits. Our goal is to tell you about the best of ...