1. Preparation tools: a piece of paper, a colored pen and a pen.

2. Draw the central theme: Write or draw the second unit of the second grade math book in the paper center.

3. Add main content: around the central theme, you can add the main title or theme of this unit with colored pens, such as addition and subtraction, length unit, addition and subtraction within 100 and so on. These headings should be consistent with the main content of this unit.

4. Add subtopics: Under each main heading, you can add some subtopics or key concepts, such as addition and subtraction, understanding of centimeters and meters, solving problems and so on. These subtopics should be the key knowledge points under each main content.

5. Connecting themes and sub-themes: connecting themes and sub-themes with lines to form a clear hierarchical structure.

6. Add examples or examples: Under the sub-theme, you can add some concrete examples or real-life scenes to better understand and remember these concepts.

7. Draw personalized elements: You can also add some personalized elements, such as your favorite colors, patterns or symbols, to make the mind map more attractive and personalized.

Hand-painted mind mapping skills;

1. Use colors: When drawing mind maps, you can use different colors to distinguish different themes or categories. This can help the brain to better understand and remember the content of mind map.

2. Use graphics: Using graphics in mind map, such as bubble diagram and tree diagram, can express ideas and concepts more intuitively. At the same time, arrows or connecting lines can be used to express the relationship between different topics, so that the content of mind map can be presented more clearly.

3. Use keywords: Using keywords in mind maps can help the brain find the information it needs faster. You can write keywords on each node, so that you can recall relevant information more quickly.