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Abstract: Primary school mathematics is one of the basic subjects of primary school education, which is of great educational significance to elementary school students' mathematics enlightenment. Micro-class is an efficient teaching aid, which can help students to quickly sum up knowledge and master key and difficult knowledge, so as to achieve the purpose of efficient learning. Primary school mathematics teachers should build an efficient primary school mathematics classroom based on the "people-oriented" teaching concept and micro-class. The flexibility of micro-lessons enables math teachers not only to help primary school students learn math knowledge at any time, but also to focus on cultivating primary school students' math core literacy, promoting the all-round development of primary school students' math ability, thus improving the teaching effect of primary school mathematics.

Keywords: micro-class; Primary school mathematics; Efficient classroom;

First, the teaching significance of micro-courses

With the reform and development of education, primary school mathematics, as the starting point of students' mathematics learning, should also change its teaching mode. Micro-class is a new teaching method. Micro-lessons usually last about ten minutes, which can help students quickly sort out knowledge points and grasp knowledge difficulties. Micro-lesson video has great teaching value, because of its high flexibility, so that teaching is no longer limited to classrooms in time and textbooks in knowledge. Micro-lessons can also allow students to freely adjust their study time and help each student improve their own deficiencies in knowledge learning.

Combining micro-lessons to build an efficient classroom of primary school mathematics, firstly, teachers should emphasize preview and review, and can adjust students' learning time by micro-lessons, so that students can get the maximum learning effect; Secondly, teachers should pay attention to the classroom form, and can combine micro-lessons to enrich classroom teaching, create classroom atmosphere and stimulate students' interest in learning; Finally, teachers should make mathematics learning close to real life, let students learn mathematics in life and learn life knowledge from mathematics. Therefore, the combination of mathematics teachers and micro-courses can diversify classroom teaching, improve students' learning ability and promote their all-round development.

Second, based on micro-class, the construction strategy of efficient classroom of primary school mathematics

(A) pay attention to preview and review

Every link in primary school mathematics learning is very important. Learning time in class is important, but students can only get twice the result with half the effort if they do a good job in preview and review. Preview can make students prepare lessons, make them more confident in class and ensure the quality of their classroom learning. Review can deepen students' impression of new knowledge and consolidate knowledge. Therefore, teachers should urge students to prepare well before class and review after class, pay attention to guiding students to learn independently, be independent of teachers and classrooms, and cultivate students' autonomous learning ability.

For example, in the study of parallelogram and trapezoid, the first volume of mathematics in the fourth grade of primary school published by People's Education Press, teachers should arrange preview tasks in advance in the last class, so that students can have a general understanding of the chapter content by using micro-lesson videos, find out what they don't understand in the textbook, and be familiar with the similarities and differences between parallelogram and trapezoid. After the classroom teaching of this class, the teacher should let the students review after class by using the video of micro-class, and summarize what they have learned in this class. Only in this way can primary school students develop good study habits of preview and review, and they can study easily in class. The use of micro-lessons can play a great role in the whole primary school mathematics teaching, including preview, classroom and review, thus improving the teaching quality, cultivating students' awareness of autonomous learning and improving students' mathematics learning ability. [ 1]

(B) to create a charming classroom

The knowledge of primary school mathematics is extensive, which is a subject that primary school students have never been exposed to before. As a primary school math teacher, we should create a good teaching atmosphere in the classroom to stimulate the curiosity of primary school students and prompt them to enter the learning state quickly. Therefore, primary school math teachers can combine micro-lesson videos to play learning videos that primary school students are interested in, so as to attract students' attention and guide them to concentrate on classroom learning. Micro-lesson video, a colorful teaching form, can help teachers create a classroom teaching atmosphere, build a charming primary school math classroom, and let students fully absorb knowledge.

For example, in the study of Unit 5 "Area" in Book 3 of Primary School Mathematics published by People's Education Edition, teachers can let students watch micro-lesson videos about "area" in class and ask questions such as "how to measure the area of the classroom" to stimulate students' curiosity. Teachers can also use micro-lessons to enrich classroom forms and interact, such as playing a learning video with an area for answering questions, so that students can quickly calculate the area after each question comes out and reward students who answer the questions fastest and correctly. Therefore, teachers can create a learning atmosphere in the classroom, stimulate students' interest in learning, and help students quickly enter the learning state, thus improving the teaching efficiency of primary school mathematics classroom.

(3) Close to life, so that you can learn more.

Pupils are curious about new knowledge. Therefore, the primary school stage is an important stage to cultivate students' hobbies and learning ability. Mathematics is a subject close to real life. Primary school mathematics teachers should pay attention to cultivating pupils' ability to discover, observe and feel mathematical knowledge in life. Through study and hands-on practice, students can understand some common mathematical knowledge in life and solve some mathematical problems in life. Therefore, in primary school mathematics teaching, teachers can use micro-lesson videos to carry out some hand-made activities to improve students' practical ability.

For example, in the second volume of the third grade mathematics of the People's Education Press, the teacher can ask students to prepare paper and pencil, calculate the calendar of next year according to this year's calendar, and make a calendar book by themselves. Teachers can ask students to accurately make a monthly calendar according to the steps and formula "135780 wax" in the micro-lesson video. Calendar is not only close to life, but also practical. After the students have finished making calendars, the teacher can ask the students to bind the calendars and give them to their relatives as a souvenir.

Therefore, primary school mathematics teachers combined with micro-class teaching can not only consolidate students' textbook knowledge, but also exercise students' practical ability, expand students' mathematical thinking and cultivate students' mathematical core literacy.

In short, in primary school mathematics teaching, teachers can integrate micro-lessons into classroom teaching, which can maximize classroom efficiency. The flexibility of micro-lessons can enrich classroom forms and make classroom teaching more humanized. At the same time, the flexibility of micro-lessons can also allow students to control their study time independently, establish their own learning methods and systems, and lay the foundation for future mathematics learning. In addition, teachers implement mathematics teaching close to real life through micro-courses, improve students' practical ability and promote students' comprehensive mathematics ability.

Three. refer to

[1] Guo Sailing. Research on efficient classroom teaching of primary school mathematics based on micro-lesson [J]. New course (middle), 20 17(06).

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