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30 magg 1930 anni - The invention of the overhead projector

Descrizione:

the device was used with the army during WWII and it eventually made its way into the classroom

Aggiunto al nastro di tempo:

The history of Ed Tech

Byjulia cline
4 dic 2017

Data:

30 magg 1930 anni
Adesso
~ 94 years ago
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