Mind mapping is a tool used to organize and express knowledge. It usually puts the related concepts of a topic in a circle or box, and then connects the related concepts and propositions with lines, which represent the meaning relationship between the two concepts. Mind mapping can build a clear knowledge network, facilitate learners to master the whole knowledge structure, facilitate the formation of divergent thinking and promote the transfer of knowledge.

Second, the application of mind mapping in primary school mathematics

(A) Instructional design tools

Mind mapping provides support and help for teachers' teaching design. Through mind mapping, teachers can present the framework structure of knowledge more clearly and teach more orderly. Teachers can use mind map to summarize and sort out the teaching content, highlight the key and difficult points of teaching, show the main concepts and principles of teaching in an intuitive way, concisely express the logical relationship of concepts, present the status and correlation of concepts, and let students find the differences and connections between concepts, thus improving the efficiency of classroom teaching.

(B) tools to create thinking

The process of making mind maps is actually the process of students' creation. Students have a wider imagination and can design qualified mind maps according to their hobbies. In the process of making mind maps, students have to think a lot, and new ideas will sprout in their minds. When students compare their mind maps with other people's works, new ideas will appear. It is beneficial to cultivate students' innovative spirit and practical ability.

For example, when students study the decimal part of the fifth grade, they construct such a mind map by communicating with their classmates.

(c) Knowledge integration tools

The new curriculum standard requires that we should pay attention to the combination with reality in primary school mathematics teaching, improve our understanding of mathematics as a whole, and let students understand the structural relationship between knowledge and feel the integrity of mathematics. In primary school mathematics, a lot of knowledge seems irrelevant on the surface. In fact, they are inextricably linked, and what connects them is "mathematical thought and method". The teaching of mind mapping urges students to move from scattered and fragmented mechanical learning to meaningful learning that pays attention to relationships and is full of active exploration vitality.

For example, in the teaching of "perimeter and area of plane graphics", there are many concepts involved in this part, such as perimeter and area, and the calculation formulas of perimeter and area of six plane graphics. How to tell these concepts to students? How to make students construct the meaning of knowledge? How to get students' feedback on the mastery of these contents? By guiding the students to discuss the content of the review, the teacher made clear the task of the review: (1) What do you mean by the perimeter and area of the plane figure? (2) What plane graphics did you learn in primary school? (3) The formula for calculating the perimeter of a plane figure? (4) The formula for calculating the plane graphic area? Please organize the above contents into a mind map, so that people can see the connection between the calculation of plane graphic area at a glance.