If you need an array of worksheets to augment your science lessons, peruse a collection of assignments that is sure to fit your needs. With topics such as metric conversion, the scientific method, textbook features, research skills,...

Learners explore atomic measurement in the first activity in a series of 36. Through readings, activities, and questions, classes review standard SI units, learn about Avogadro's constant, and use it to help them calculate moles. They...

Is your class in another dimension with regards to dimensional analysis? Give them some extra practice with a straightforward activity. Learners convert units by following concise step-wise examples, including setting up the...

Wikipedia offers detailed information on SI, or the International System of Units. Includes hyperlinked table of contents for easy site navigation.

This is the definitive source for information on SI base units, derived units, squares, cubes, luminosity, field strength and flux density.

BIPM (Bureau International des Poids et Mesures) is an international organization, located in France, an equivalent of our National Institute of Standards and Technology (NIST). This site is the BIPM intro page to their official...

Very complete chart of conversion factors for English to SI (metric) unit measurements and SI (metric) to English unit measurements. Includes length, area, volume, mass, temperature, illumination, and force & mass (stress).

The learning resource discusses units, dimensions, and measures used in Chemistry. Some topics explored are dimension, symbols in metric units and symbols in English units. The activity consists of definitions and explanations.

The official rules for using the SI (metric) system in the US, based on the National Institute of Standards. Must download their handbook.

Using inquiry-based learning, students work in groups to devise metric conversion factors after analyzing example calculations. By finding inaccuracies in the problems given, students zero in on the correct methods of doing conversions.

The official sources from which NIST forms its decisions for "official usage". Most useful if you're doing serious research about SI.

The U.S. Metric Association offers important dates in the history of the metric system of measurement, including the fact that Thomas Jefferson proposed a decimal-based measurement system for the United States in 1790. Site includes...