Chalkboard (noun)

A blackboard or whiteboard that is typically made of a dark, smooth surface, such as slate or painted metal, on which one can write or draw using chalk or whiteboard markers.

Origin:

The word chalkboard is a compound word formed from the noun chalk + the noun board. the word chalk refers to a soft, white material made from limestone that is used for writing or drawing on surfaces, while the word board refers to a flat piece of wood or other material used for various purposes, such as writing on or displaying information. the word chalkboard was first used in the early 19th century.

Examples:

1. The teacher wrote the lesson on the chalkboard.
2. The students copied the notes from the chalkboard.
3. He cleaned the chalkboard with a eraser.
4. She drew a diagram on the chalkboard to explain the concept.
5. The classroom had a large chalkboard on one wall.