Put the paper horizontally first, which is wider. In the center of the paper, draw a central image that can represent the theme image in your mind, such as the title of a math chapter.

When drawing, you should start from the center of the figure and draw some thick lines that radiate around. Each line uses a different color, and these branches represent the main idea of your theme. For example, draw the title of the main content of this chapter.

Next to each keyword, draw a picture that can represent it and explain it. Then expand the content, such as concepts, properties, commonly used formulas and so on.

Expand this mind map with association. Continue to improve