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AIzaSyAYiBZKx7MnpbEhh9jyipgxe19OcubqV5w
December 31, 2023
3674632
335851
2

jan 1, 1954 - B.F. Skinner introduces programmed instruction

Added to timeline:

14 Jan 2020
0
0
233
IDT History

Date:

jan 1, 1954
Now
~ 69 years ago
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