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BornThinker Check out fun online games, practice telling time, or watch animated tutorials for writing letters and numbers. Requires Shockwave.
http://www.bornthinker.com
Metric 4 US A site promoting the metric system which argues why metric is better and English is worse.
http://www.metric4us.com/
Metric Conversion Tables Conversion factors and online calculators for metric and imperial units.
http://www.metric-conversion-tables.com/
Official U.S. Time Click on any time zone in the United States and get the exact time.
http://www.time.gov/
Old Royal Observatory and Planetarium Located in London, England, this is the home of Greenwich Mean Time (GMT) and Earth's Prime Meridian, where longitude was determined.
http://www.rog.nmm.ac.uk/
Playing With Time 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.
http://www.playingwithtime.org/
Time Estimation See how well you can keep track of time with this fun game.
http://www.explorelearning.com/
World Time Server This useful site tells you the current time in any location around the world.
http://www.worldtimeserver.com/
