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1 jan 1841 ano - Classroom Chalkboards

Descrição:

While classroom chalkboards were introduced in 1841, it was not until the end of the 1800's that they were included in all schools. Horace Mann was a major advocate.

Adicionado na linha do tempo:

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ByKate Belt
24 out 2018
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376

Data:

1 jan 1841 ano
Agora
~ 184 years ago
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