1801: Chalk Board.
Using chalk and tablets dates back centuries, but the idea of the blackboard goes back to the late 1700s, when actual wood was painted black and used with chalk.
The modern slate version of the blackboard appeared in the early 1800s in Scotland. The historian Stephen Ambrose claims that a blackboard was used at West Point by an instructor in 1801.
As blackboards became more popular by the mid-18th century, Vermont, Maine, Pennsylvania, New York, Maryland and Virginia cashed in on their slate deposits. Now, it’s all about the white board. But blackboards haven’t disappeared. T hey’re still a fixture in many classrooms.
We’re here to help you navigate this changed world and economy.
Our mission at Marketplace is to raise the economic intelligence of the country. It’s a tough task, but it’s never been more important.
In the past year, we’ve seen record unemployment, stimulus bills, and reddit users influencing the stock market. Marketplace helps you understand it all, will fact-based, approachable, and unbiased reporting.
Generous support from listeners and readers is what powers our nonprofit news—and your donation today will help provide this essential service. For just $5/month, you can sustain independent journalism that keeps you and thousands of others informed.