A board to be written on with [[chalk]], typically used in [[school]] [[classroom]]s as a visual aid. 

Also known as a blackboard.

h4. See also

* [[Ai ai gasa]]
* [[Chalkboard scraping]]
* [[Chalkboard sign]]
* [[Whiteboard]]

h4. External links

* "Wikipedia: Blackboard":[https://en.wikipedia.org/wiki/Blackboard]
黒板 黑板