A comprehensive guide for learning all about measuring weight with definitions, units of measurement, and conversion.

This site examines the specific difference between mass and weight in addition to length, temperature, and time.

On this interactive site students learn to use various units of mass to solve problems and put objects in order by their mass.

For the majority of recorded human history, units like the weight of a grain or the length of a hand weren't exact and varied from place to place. Now, consistent measurements are such an integral part of our daily lives that it's hard...

The concern over obesity in children in the United States is staggering. This site provides research and statistics along with suggesting ways to change the epidemic. Includes video.