Cách sử dụng
Chalk is a soft, white material that is often used for writing or drawing on blackboards, sidewalks, or other surfaces that are not too rough. You might use chalk to write down math problems in a classroom, or to draw pictures on the sidewalk. It can also refer to a line or mark made by chalk, such as a chalk outline at a crime scene. Chalk is often associated with teaching or learning, but it can be used in many different settings.