noun
- plural of blackboard; dark surfaces, typically made of slate or similar material, used for writing or drawing with chalk in classrooms
Usage: traditional classroom equipment; largely replaced by whiteboards in modern schools
Examples
- The old school had blackboards in every classroom.
- Teachers wrote lessons on blackboards with white chalk.
- Students cleaned the blackboards after class.
- The blackboards were replaced with modern smart boards.
- Math problems covered both blackboards at the front of the room.
- Chalk dust from the blackboards made some students sneeze.