1. Pay attention to providing students with familiar specific scenarios according to their existing experience and life experience, and help them understand mathematics knowledge.

2. Increase the content combined with reality to help students understand mathematics in real life and feel the close connection between mathematics and daily life.

3. Pay attention to choose learning materials and activities that are full of children's interest, stimulate students' interest in learning, and get a pleasant mathematics learning experience.

4. Pay attention to guiding students to explore independently and cooperate with each other, so that students can learn in the atmosphere of cooperation and independent exploration.

5. Grasp the teaching requirements, promote the development of students, and appropriately improve the methods of evaluating students.

Second, teaching material analysis

This textbook includes the following contents: understanding of large numbers, multiplying three digits by two digits, dividing divisor by two digits, angle measurement, understanding of parallelogram and trapezoid, composite bar graph, wide-angle mathematics and mathematical practice activities. The understanding of large numbers, the division of three digits by two digits, the measurement of angles, and the understanding of parallelogram and trapezoid are the key teaching contents of this textbook.

In terms of numbers and calculations, this textbook arranges the understanding of large numbers. Three digits are multiplied by two digits, and the divisor is the division of two digits. In primary school, after the end of this semester, all the contents about the understanding and calculation of positive integers will be taught. On the one hand, the study of this knowledge enables students to learn to express and communicate with large numbers, master computing skills in a wide range, and further develop their sense of numbers; On the other hand, through the study of decimal counting method, all aspects of knowledge about the concept of numbers are systematically sorted out and integrated, laying the foundation for students to form a scientific and reasonable mathematical cognitive structure; And pave the way for further systematic study of decimals, fractions and the four operations of decimals and fractions. So this part of knowledge is still the basic knowledge and skills that primary school students should master and form.

In terms of space and graphics, this textbook arranges two units: angle measurement, parallelogram and trapezoid, which are the key teaching contents of this textbook. On the basis of existing knowledge and experience, through rich mathematical activities, students can further understand straight lines, line segments, rays, angles, perpendicular lines, parallel lines, parallelograms and trapezoid, and learn some simple drawing methods; At the same time, we can gain the experience of inquiry learning, understand the characteristics of various graphics and their relationships, and promote the further development of students' spatial concept.

In terms of statistical knowledge, this textbook arranges composite bar charts. The textbook introduces two different forms of composite bar charts, vertical and horizontal, so that students can use their existing knowledge to learn to understand these two charts, learn to analyze data, further understand the role of statistics in real life and form the concept of statistics.