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Math » Other Math

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Using Triangle Geometry, a problem to decide which Coast Guard is closest to a ship is sending an SOS.

National Library of Virtual Manipulatives provides interactive online math lessons, activities, and assessments. Topics include...

Image of a cipher disk

CryptoKids®: America's Future Codemakers & Codebreakers explores the making and breaking of codes. Read declassified top secret documents (Korean...

Illustration of the sizes of various stars

Imagine the Universe includes lesson plans on wavelengths and frequencies, sizes of stars, gamma-ray bursts...

The mature cotton boll pictured at right was protected by a gene for Bt; other bolls show damage from cotton pests (Photo courtesy of the U.S. Department of Agriculture-Agricultural Research Service).

Beyond Discovery traces the origins of technological and medical advances. Learn about the genetics of ear...


National Science Foundation

National Security Agency

NASA

Nat'l Academy of Sciences
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