Created by the National Institute of Standards and Technology, this comprehensive units and measurement website contains fundamental physical constants, the International System of Units (SI), or metric system, and...

PBS has developed a number of websites for educators, and their PBS Teachers site has received a number of accolades and high praise from diverse quarters. First-time visitors to the site may wish to first use the...

This simulation provides practice on estimation of relative sizes. The user must estimate the relative lengths, areas, or volumes of objects. This activity builds student abilities to understand ratios and the scaling of...

Conversions, formulas, and tables about water weights, pressures, flows, volumes, horse power, pump efficiency, the weight of 100 yards of pipe filled with water, and flow rate to velocity comparisons. Also, a water flow...

In this interactive activity adapted from the Wisconsin Online Resource Center, students will "use mathematics and measuring skills to solve a construction problem." They will determine how many shingles are required to...