Under the implementation of the new curriculum reform, primary school is the initial teaching stage in the whole teaching career with the starting point of cultivating students' comprehensive quality in an all-round way. We should constantly improve teaching methods, improve students' learning comprehension ability, improve students' learning efficiency and promote the development of students' all-round quality. As a basic form of teaching, classroom teaching is the main position of school teaching. Only by improving the effectiveness of mathematics classroom teaching and creating an efficient classroom can mathematics classroom be full of vitality. Based on many years' experience in primary school mathematics teaching, combined with the present situation of primary school mathematics teaching, the author analyzes how to construct an "efficient classroom" for primary school mathematics in view of some existing problems.

1 Dig deep into teaching materials to ensure the effectiveness of knowledge.

As a primary school math teacher, we should study the textbooks in depth and make appropriate supplements to the textbooks under the guidance of the new curriculum standards. Practice tells us that in-depth study of textbooks is the basis for improving the efficiency of mathematics classroom teaching in primary schools. Teachers should conduct in-depth and meticulous research on textbooks, make clear the intention of textbook design, the key points and difficulties of each chapter, and make some supplements to the contents of textbooks. Because a set of standard textbooks may not fully meet the needs of all schools and students in all regions, it is necessary for teachers to supplement the contents of textbooks to meet their own teaching needs. This is indisputable, because the new textbook cannot and cannot be "universally applicable". If teachers can appropriately increase the teaching content and broaden students' horizons, they will certainly stimulate students' interest in learning mathematics and arouse their enthusiasm for learning mathematics, thus improving the efficiency of classroom teaching.