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Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
4/22/2010
The Environmental Movement This button depicts the ecology symbol, a small letter “e” inside the larger letter “O,” the letters standing for “environment” and “organism.” Cartoonist Ron Cobb invented the symbol in 1969. The ecology symbol appeared in a g
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
12/30/2009
This blue wool coat is part of a suit of regimentals made for George Washington in 1789. It has a buff wool rise-and-fall collar, buff cuffs and lapels, and buff lining; there is a row of yellow metal buttons on each lapel, as well as on each cuff. The waistcoat and breeches are matching buff woo
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
7/8/2008
The Apple Macintosh introduced a graphic user interface (GUI) to the Apple line of computers. The idea had originated at Xerox's Palo Alto Research Center in the 1970s, but Xerox was slow to commercialize it. Apple proved far more successful when it introduced the Macintosh in January 1984, with
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