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1 Jan 1841 Jahr - The chalkboard was introduced into the classroom.
Beschreibung:
By Tungsten (photo taken by Tungsten) [Public domain], via Wikimedia Commons
Zugefügt zum Band der Zeit:
A Brief History of Educational Technology
By
George Tam
18 Sep 2017
0
0
832
Datum:
1 Jan 1841 Jahr
Jetzt
~ 184 years ago
Abbildungen:
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