Venkatesh Rao (@contraptions): "Damn chalkboards weren’t invented till the 1800s. Before that to do big picture thinking you’d have had to paint frescoes or something. https://www.clarus.com/blog/history-of-the-blackboard/"

The app for independent voices

Venkatesh Rao

2d

Contraptions

Damn chalkboards weren’t invented till the 1800s.

Before that to do big picture thinking you’d have had to paint frescoes or something.

clarus.com

History of the Blackboard | Clarus

The glassboard has revamped the idea of blackboards and whiteboards and creates a modern and edgy look for the 21st century teacher.

Apr 8

at

10:50 PM

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The app for independent voices

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