The new curriculum standard requires that "silence" should be changed into "speaking freely", "immobility" into "free activity" and "infusion teaching" into "independent inquiry" in classroom teaching. We are required not only to teach children knowledge, but also to teach them how to master knowledge, to create an efficient classroom suitable for them, and to make the math classroom full of vitality. Keywords: primary school mathematics; Efficient classroom; As a basic teaching form, conditional classroom teaching is the main position of school teaching at present and in the future, and the goal of mathematics teaching must be completed in the classroom. The new curriculum standard requires that in classroom teaching, the silence in the past should be changed into speaking freely, the stillness into free activities, and the indoctrination teaching into independent inquiry. We should not only teach children knowledge, but also teach them how to master it. This has not been well implemented in our classroom, which reflects a thought-provoking question-how to improve the effectiveness of mathematics classroom teaching, create an efficient classroom suitable for ourselves, and make mathematics classroom full of vitality? 1. Understanding students and teaching students according to their aptitude is the premise of an efficient classroom 1. Understand students' personalities. Most students are happy to be praised by their teachers in their studies. Therefore, regular small-scale competitions can stimulate their interest in learning, enhance their sense of competition, and let students advance together in the competition. In teaching, all kinds of competitive means are adopted to stimulate students' interest in learning and enthusiasm for active participation, so that all students can make progress together. 2. Understand students' original cognitive basis. When anyone is learning new knowledge, the old knowledge must always be involved. Learning new knowledge with existing knowledge not only improves the content of classroom teaching, but also eliminates the invalid space in the classroom and reduces students' learning obstacles. Teachers should ask questions from reality as far as possible, so that students can understand that mathematical knowledge comes from life and is applied to real life, so as to realize the role of mathematical knowledge in real life; At the same time, teachers should also provide students with more opportunities to extract mathematical problems from concrete examples in daily life and use the learned mathematical knowledge to solve many practical problems in real life. Second, cultivating good listening habits is the first condition for an efficient classroom. To build an efficient classroom, we must first turn the "lively classroom of speech" into a "classroom of mutual listening". Only in the "listening class" can all kinds of thoughts and emotions communicate with each other through words, otherwise communication is impossible. Listening to students' speeches is like playing baseball and pitching with students. Accurately catch the ball thrown by the students. Even if the student who threw the ball didn't say anything to you, he was in a happy mood. As a teacher, you should be good at catching every ball thrown by students, especially the ball that students throw badly or miss, which is also the best performance of your own professional quality and ability to control the classroom. Third, adequate preparation before class is the condition of efficient classroom. According to the physical and mental characteristics of students of different ages, the new curriculum standard has made scientific and specific provisions on the teaching objectives of different classes. First of all, the orientation of teaching objectives should be moderate and difficult. Just like playing basketball, the basket is too high, and students can't throw it in no matter how hard they try, so they naturally lose confidence; Moreover, if the basket is too low, students will easily fall into it, and of course there will be no joy in overcoming difficulties. Secondly, teachers should fully consider the unity of three-dimensional goals when formulating teaching goals. The formulation of teaching objectives should also consider three levels: good, medium and poor. According to the principle of teaching students in accordance with their aptitude, the formulation of teaching objectives should also vary from person to person, and students at different levels require different goals, so it is necessary to avoid generalizing. Fourthly, optimizing classroom teaching process is the key to efficient classroom. Mathematics curriculum standard points out: "Effective mathematics learning activities can not only rely on imitation and memory. Hands-on practice, independent exploration and cooperative communication are important ways for students to learn mathematics. " And efficient mathematics learning activities should be a higher level pursuit on the basis of effective mathematics learning activities. 1. Guide and show the goal before class. Fascinating introduction can awaken students' thirst for knowledge and stimulate their interest in learning. Therefore, as soon as the teacher enters the classroom, either let the students listen to the recording or music related to the text, or tell a short story related to the text, or start a wonderful dialogue related to the text, or import it with video clips. So as to stimulate students' interest and motivation in learning and improve classroom efficiency. 2. Develop an outline to guide self-study. Write a small blackboard before class, so that students can see it in class and make clear the requirements of self-study, that is, what to learn, how long it will take, how to take the exam, etc. And guide students to learn independently, such as reading, whether to read independently around thinking about problems and finding answers, or to discuss and solve difficult problems while reading. As for the proposal of learning objectives and self-study requirements, the best way for junior students is to stimulate competition, because competition can stimulate children's thirst for knowledge and stimulate students' enthusiasm for learning. 3. Group discussion and cooperative exploration. Cooperation is more important than knowledge. It is becoming an important quality of contemporary people and is favored by everyone. Group cooperative learning in class is conducive to emotional communication and information exchange between teachers and students, and encourages students to observe and think from different angles, thus developing divergent thinking and seeking the opposite sex. 5. Using information technology is an important strategy for efficient classroom teachers to implement course teaching activities in the information environment based on multimedia and network, and to make the course teaching content informationized, so as to make it a learning resource for learners and provide it for students to enjoy. In normal teaching, I often use multimedia for teaching, which is very helpful for teaching.