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William Henry Harrison, the ninth U.S. president, was the only one who studied medicine, although he never became a doctor. He was also the first president to die in office, of pneumonia, less than two months after his inauguration in 1841.
Anatomy of a Cell... Click thru for the free download, great for homeschooling or a lesson in the classroom.
How the Titanic Sank... Click thru for a downloadable/printable version.
Sunset at Stonehendge
In this famous World War II photo from 1945, soldiers raise the flag over Iwo Jima, signaling a key victory for the United States.
Americans were the first, and so far the only, human beings to set foot on the moon (1969, NASA)
George Washington examining The Betsy Ross flag, one of the most well-known of the early American flags.
Federal, State, and Local Government diagram, click thru for PDF download!
Photosynthesis in 4 easy-to-follow steps