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1 ene 1960 año - By the 1960s, overhead projectors were commonly used in schools.

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By mailer_diablo (Self-taken (Unmodified)) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons

Añadido al timeline:

A Brief History of Educational Technology

ByGeorge Tam
18 sep 2017
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0
835

fecha:

1 ene 1960 año
Ahora mismo
~ 65 years ago

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