Before 1954, so-called portable radio receivers used vacuum tubes to receive and amplify signals.
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Grade Range:
4-12
Resource Type(s):
Reference Materials
Date Posted:
10/14/2008
On June 25, 1950, the Cold War turned hot when armies from North Korea invaded into South Korea hoping to unify the Korean Peninsula under communism. Students will learn about the American involvement in the Korean Conflict in this section of the online exhibition entitled The Price of Freedo
