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.
PBS
Pbs Mathline: It Takes Ten Lesson Plan [Pdf]
Students rotate from station to station completing activities involving measurement weight, length, and volume using metric measurement.