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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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11 dic 1841 año - the classroom chalkboard was first introduced.
Añadido al timeline:
laurens timeline ed tech
By
lauren smith
18 oct 2018
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316
fecha:
11 dic 1841 año
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~ 184 years ago
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