33
/es/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
November 30, 2025
1928144
159211
2
Create a timeline
Public Timelines
For education
For educational institutions
For teachers
For students
Cabinet
For educational institutions
For teachers
For students
Open cabinet
FAQ
Close
Create a timeline
Public timelines
FAQ
About & Feedback
Acuerdo
Privacidad
FAQ
Support 24/7
Cabinet
Get premium
Donate
30 agos 1931 año - the overhead projector was widely used by the U. S. Military to train forces during World War II and eventually the device spread to schools.
Añadido al timeline:
laurens timeline ed tech
By
lauren smith
18 oct 2018
0
0
310
fecha:
30 agos 1931 año
Ahora mismo
~ 94 years ago
About & Feedback
Acuerdo
Privacidad
FAQ
Support 24/7
Cabinet
Get premium
Donate
The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.
Secured with SSL
