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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
May 31, 2021
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1 Jan 1930 Jahr - Overhead Projector

Beschreibung:

In the United States, the overhead projector was used to train the US military, but has since been adapted into schools and organizations. The effectiveness of a common screen facilitates learning, making it an effective tool.

Zugefügt zum Band der Zeit:

5 Mon. zuvor
0
0
116
Ed 131 Technology Timeline

Datum:

1 Jan 1930 Jahr
Jetzt
~ 91 years ago
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