Environmentally friendly chalk is a green alternative to traditional chalk, designed specifically to reduce classroom dust pollution. It adopts a special formula, usually made by mixing calcium carbonate and non-toxic dyes, aimed at reducing dust generation and minimizing irritation to the respiratory tract of teachers and students. In classroom teaching, environmentally friendly chalk can write clearly on the whiteboard and is easy to erase without leaving any residue. It not only helps to protect the respiratory health of teachers and students, but also maintains the cleanliness of the classroom environment. In addition, environmentally friendly chalk comes in a variety of colors, which can enrich the display of teaching content and enhance students' interest in learning.