Brush up on the metric system and the history of standard units. Learn about the United States' experience with metrics, see helpful equivalent charts and even find a recipe for metric chocolate chip cookies.
Math Is Fun: Measurement offers an excellent overview of measurement that includes length, mass, temperature, volume, time, speed, and the metric system. It also addresses conversions and accuracy in measurement. This site covers beginning to advanced concepts and is useful for both teacher and student enrichment.
Education.com has 25 measurement lesson plans for grades K-5, including several on measuring volume and mass. They also offer hands-on measurement activities for children in grades 1-4. Try the Measurement Conversion Game, Measurement Scavenger Hunt, and Ant Race Measuring Game.
Middle-grade students love Study Jams from Scholastic, featuring RJ and Mia. Start with Units of Measurement, then try Tools of Measurement, Measure Length (easier), and Customary Units of Length (harder). Many of these include interactive exercises, karaoke songs, and quizzes.
Find a helpful compilation of videos that teach measurement for younger and older students. For primary students, the need for standard units is explained well in Units of Length. Especially good for middle grades are the Number Rock videos on Capacity, Weight, Length, and Metric System.
Find measurement crossword puzzles, word searches, vocabulary matches and more at Learning Games For Kids. The site includes both printables and online games for different grade levels.