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1 янв 1930 г. - Overhead projectors are used in the classroom
Описание:
Overhead projectors were first used by the military, but quickly became the go-to source of technology in classrooms for decades
Добавлено на ленту времени:
Technology in Schools
By
Kris Lessinger
2 ноя 2017
0
0
256
Дата:
1 янв 1930 г.
Сейчас
~ 94 г назад
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