교실 등에서 분필로 글씨를 쓰거나 그림을 그리는 데 사용하는 매끄러운 판.
A smooth, hard panel, often green or black, used in classrooms for writing or drawing with chalk.
예문:
"The professor filled the entire chalkboard with complex mathematical equations."
"Please help me clean the chalkboard before the next lesson starts."