1, progressive:

According to the law of students' cognitive development, the primary school mathematics textbooks published by People's Education Publishing House organize knowledge points from easy to difficult and from shallow to deep. Each unit will first introduce basic concepts and methods, and then gradually introduce related skills and application topics to help students gradually establish a mathematical concept system.

2. Integrity:

Teaching materials integrate mathematical knowledge into real life, pay attention to the organic combination of knowledge and skills, emotional attitude and values, and cultivate students' comprehensive ability to use mathematical knowledge. For example, when teaching the concept of fraction, the textbook will introduce the application in practical situations such as shopping and making drinks to help students understand abstract concepts.

3. Systematize:

The knowledge points of each unit are interrelated to form a systematic knowledge structure. At the beginning of each unit, the textbook will briefly introduce the knowledge points and learning objectives involved in the unit, so that students can better understand and remember mathematics knowledge in the learning process.

4. Deepen:

In the content of each unit, the textbooks are expanded, extended and deepened, so that students can have a deeper understanding and understanding of what they have learned. For example, in the teaching of geometric figures, textbooks will introduce more advanced concepts such as three-dimensional figures and spatial position relations to help students further deepen their understanding of geometric figures.