Check out fun online games, practice telling time, or watch animated tutorials for writing letters and numbers. Requires Shockwave.

A site promoting the metric system which argues why metric is better and English is worse.

Conversion factors and online calculators for metric and imperial units.

Click on any time zone in the United States and get the exact time.

Located in London, England, this is the home of Greenwich Mean Time (GMT) and Earth's Prime Meridian, where longitude was determined.

See movies that show the changing world around you, go on an exploration of a place in time and find out what's happening behind the scenes, or check out the time-related activities in this exhibit.

See how well you can keep track of time with this fun game.

This useful site tells you the current time in any location around the world.