A chalkboard is a common tool used in classrooms and other educational settings. It is a large board made of SLATE, usually painted black, on which messages can be written with chalk. The term 'chalkboard' can also refer to the MENU of items available in a restaurant or store. To ERASE the chalkboard, an ERASER is used, which is often DUSTY from use. ERASES, ERASER, and erasable are all related terms, with ERASURE referring to the act of erasing something. Finally, a LESSON is often written on a chalkboard for students to learn.