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Grade Range:
K-12
Resource Type(s):
Reviewed Websites, Interactives & Media
Date Posted:
4/9/2014
Whether convenient, fast, organic, processed, gourmet, ethnic, or local—the foods available to Americans have never been more plentiful and diverse, or more ripe for discussion. Coupled with big changes in who does the cooking, where meals are consumed, and what we know (or think we know) about
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
12/31/2009
In the early days of electronic computers, memory was not as efficient or inexpensive as it is today. To save memory space, programs stored as few digits as possible for dates. In COBOL, for instance, January 1, 1999, was stored as 010199. As Year 2000, or Y2K for short, approached, it became app
Grade Range:
K-12
Resource Type(s):
Artifacts, Primary Sources
Date Posted:
11/6/2008
The Global Positioning System (GPS) consists of NAVSTAR satellites in earth orbit that send signals to receivers on land, sea, or in the air. The system became operational in 1978. Its military usefulness was demonstrated during Operation Desert Storm (1991), when coalition troops with receivers
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