1, rich in knowledge points: The teaching materials of Beijing No.4 Middle School are rich in mathematical knowledge points, ranging from basic mathematical concepts to in-depth advanced mathematical knowledge, with strong hierarchy and completeness.

2. Clear logical framework: The design of mathematics handouts in Beijing No.4 Middle School attaches great importance to logic. The content layout of each chapter is reasonable and clear, and the knowledge points are clear, which can not only help students fully understand mathematics knowledge, but also guide students to form a clear logical way of thinking.