These sites provide basic level information on volume and capacity. Learn about a concept of volume and measuring volume/capacity. Includes teaching ideas, games, and lesson plans. There is also a link to eThemes Resource on Math: Customary or Standard Measurement.
These sites have information on the customary system of measurement used in the United States. There are several online games and quizzes, some lesson plans, and many practice questions. There are links to eThemes Resources on time, temperature, and the metric system.