During a thunderstorm on September 3, 1970, hail formed, creating the heaviest hailstone of the 20th century. The …
Blaise Pascal: A Unit Study
Blaise Pascal was a French Renaissance scientist, mathematician, inventor, and theologian who was born on June 19, …
La Salle and the Great Lakes: A Unit Study
French explorer René-Robert Cavelier, Sieur de La Salle, ultimately claimed the entire Mississippi River basin for …
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DNA & Genetics: A Unit Study
On September 13, 1994, President Bill Clinton signed the Federal Crime Bill, which included the U.S. DNA Identification …
Morse and the Telegraph {Free Unit}
On May 24, 1844, the first Morse code telegraph message was sent over a line from the Supreme Court room in the Capitol …
Transcontinental Railroad 150th Anniversary Teaching Resources
One of our more popular units is on the Transcontinental Railroad. This May 10 is the 150th anniversary of the Golden …
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