Hi, what do you want to do?
PBS
Pbs Mathline: Sand Babies (Pdf) [Pdf]
In this engaging instructional activity, students use a variety of measurement strategies in creating their own Sand Babies. Students explore standard and non-standard measurements, area, data collection and analysis, and graphing....
National Institute of Standards and Technology (NIST)
International System of Units: Si Base Units
This is the definitive source for information on SI base units, derived units, squares, cubes, luminosity, field strength and flux density.
Other
Unit conversion.org: Online Unit Converter
Need a unit converter? Links to the most common converters provide access to the answers you need quickly.
Science Struck
Science Struck: Metric System Chart for Kids
This resource explains the structure of the metric system of measurement; the basic units of measurement for length, volume, and mass; and provides charts for each type of measurement. A chart of customary US units is also given.
Khan Academy
Khan Academy: Unit Reasoning Lesson
Unit reasoning helps us make sense of measurements by converting between measurement units and making reasonable estimates. For the Praxis test, we need to know common measurement units for length, time, volume, and mass, as well as how...
Khan Academy
Khan Academy: Us Customary Conversion Word Problems
Practice US customary length, volume, and mass problems that require expressing measurements given in a larger unit in terms of a smaller unit. Students receive immediate feedback and have the opportunity to try questions repeatedly,...