Shodor Education Foundation
Shodor Interactivate: Stopwatch
This is a general-use stopwatch that can serve any purpose, for any subject area. The stopwatch counts up and down, records times that events happen, and also includes a buzzer that will activate at any time the user chooses. Java is...
Math Is Fun
Math Is Fun: Stopwatches
Use this online stopwatch to learn about elapsed time. This timer can time three different events at once and has an alarm.
Smithsonian Institution
National Museum of American History: On Time: Mechanizing Time
As the tempo of life accelerated and speed became a virtue, a horse-racing craze swept the nation. At the track, stopwatches made it possible to post winning times in quarter-seconds! In 1855, Lexington, the country's most famous horse,...