The classroom blackboard is an indispensable tool in teaching activities, mainly used by teachers to write teaching content, display courseware, and design blackboards. Blackboards are usually installed at the front of the classroom, with a larger size for easy viewing by all students. The fabric of blackboards is mostly high-quality alloy steel plates with wear-resistant coatings, which have clear handwriting, are easy to erase, have less dust, and are suitable for long-term use. Drawing boards are mainly used to draw graphics and charts, and are commonly used in courses such as mathematics and science that require intuitive display. The drawing board can be hung on the blackboard or used separately. It has magnetism and can absorb charts and magnetic teaching aids, making it convenient for teachers to demonstrate and teach.