1 gen 1801 anni - Blackboard

Descrizione:

This invention helped make group instruction easier.

The History of the Classroom Blackboard (2017). In A Blog by Concordia Univeristy-Portland. Retrieved from https://education.cu-portland.edu/blog/classroom-resources/the-history-of-the-classroom-blackboard/.

Cedar Markers 24"x18" Chalkboard With Wooden Frame. 100% Non-Porous Erasable Blackboard and Whiteboard For Liquid Chalk Markers. Magnet Board Decorative Bulletin Board for Every Event (24x18). [Image]. On Amazon. Retrieved from https://www.amazon.com/Cedar-Markers-Chalkboard-Non-Porous-Blackboard/dp/B07CTD1442/ref=sr_1_1_sspa?s=office-products&ie=UTF8&qid=1536106124&sr=1-1-spons&keywords=blackboard&psc=1.

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