School chalkboards from 1917 found. One shows a figure to teach multiplication using a technique that no teacher in the school had ever seen.
Showing posts with label technique. Show all posts
Showing posts with label technique. Show all posts
Friday, January 29, 2016
Anyone Want to Try and Figure Out How It Works?
School chalkboards from 1917 found. One shows a figure to teach multiplication using a technique that no teacher in the school had ever seen.
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