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1 ene 1930 año - Overhead projectors are used in the classroom

Descripción:

Overhead projectors were first used by the military, but quickly became the go-to source of technology in classrooms for decades

Añadido al timeline:

Technology in Schools

ByKris Lessinger

2 nov 2017

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341

fecha:

1 ene 1930 año

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~ 95 years ago

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