In the field of education, chalk plays a crucial role. It is not only a tool for teachers to impart knowledge, but also a medium to stimulate students' thinking and inspire inspiration. In class, the teacher uses chalk to write knowledge points and draw charts on the blackboard, presenting complex concepts to students in an intuitive way. And students deepen their understanding and memory of knowledge by observing and recording chalk handwriting. The writing process of chalk is not only a transfer of knowledge, but also a collision of thinking and exchange of wisdom.

Chalk is a widely used stationery in daily life, usually used for writing on a blackboard. In ancient times, chalk was usually made from natural chalk, but nowadays it is often replaced with other substances. The main component of chalk is calcium sulfate, a white precipitate that is not easily decomposed and has larger particles than dust.