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Math Aids
Math Aids: Time Worksheets
Great resource to practice and strengthen math skills pertaining to time. Math worksheets are printable, may be customized, and include answer keys.
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,...