The first step: the central theme, on paper or electronic equipment, write down "Unit 12 of Mathematics in the first volume of Grade Four" and put it in the center of the mind map.

Step 2: Divide the main knowledge points, starting from the central theme, divide the main knowledge points, and add and subtract: this is the core concept of the math unit. You can list the basic principles, formulas and examples of addition and subtraction in this section.

Step 3: Refine the sub-topic. Each major knowledge point can be further refined, including more detailed information, rules, examples and exercises. For example, in the "addition and subtraction" section, details such as addition table, subtraction table and carry method can be listed.

Step 4: Connect and arrange branches, connect the branches of the main knowledge points and arrange them to show the logical relationship between them. For example, you can put "mathematical operator" under "addition and subtraction" because addition and subtraction are the most basic mathematical operations.

Step 5: Add colors and icons. You can use colors and icons to highlight important concepts and make mind maps more attractive and easier to understand.

Step 6: Practice and review. Use this mind map to help students practice and review the course content. They can make a study plan according to the knowledge points in the mind map, find out the areas they need to understand further, and carry out targeted exercises.

Extended data:

Mind mapping is a flexible tool that can be adjusted according to students' needs and understanding.

Mind mapping is a graphical tool to express divergent thinking. We can summarize the knowledge points into mind maps and extract the important parts.

Apply mind mapping to learning, writing, reading notes, meetings and other scenes. Can sort out and summarize knowledge points, meeting progress, management methods and so on. Let's take mathematics as an example to teach you a simple method of "how to draw a mathematical mind map".

Mathematical mind map is helpful to improve the memory of mathematical knowledge points. When making mind maps, it is necessary to summarize the core contents and keywords of knowledge points, and deepen the memory of knowledge points from the side during the summary process.

Mathematical mind map is helpful to improve the understanding of knowledge points. Mathematical mind map is helpful to find problems, check leaks and fill gaps.

Mathematical mind map is helpful to improve the cognition of the whole knowledge point. By using the flow chart to summarize the knowledge points, we can present the relevant knowledge content in a certain field at a glance and understand the knowledge content as a whole.