Original copy: If the number of questions is large, you can cut the original questions and paste them on the wrong book. Error process: how to write at that time and how to copy the wrong book as it is.

Correct process: there are many solutions to general problems, and you can write many solutions. You can leave a few lines if you can. In order to look at this problem in the future, we can add new ideas.

Analysis: What I thought at that time, where I encountered difficulties, and what were the specific reasons for the mistakes, and recorded them in detail; When you finish it correctly, write down the knowledge points and key words (such as none, midpoint, similarity, congruence, isosceles, etc.) and the method of solving the problem.

Data expansion:

Pupils are children who are in primary school. It used to refer to students studying in imperial academy Children's Department and private schools, but now it refers to students studying in primary schools. "Selected Eight in the Literature Unified Examination": "Hui Zongzhu has been in power for four years, and there are nearly a thousand primary school students, some of whom are divided into ten places. Increase teaching staff and salary, and don't be tied down. From the age of eight to twelve, the rate depends on the number of times words are recited.

Safety common sense:

1. Collision avoidance. Don't chase and fight in the classroom, do strenuous exercise and games to prevent bumping and injury.

2. Prevent falling. When you need to climb up to clean and pick up things, please ask others to protect you and pay attention to prevent you from falling.

3. prevent falling. No matter whether the classroom is on a high floor or not, don't lean out of the balcony or window to avoid falling.

4. Reverse extrusion. The doors and windows of the classroom are easy to be pressed by hands when they are opened and closed, so be careful everywhere. You should gently open and close the doors and windows, and be careful not to pinch other people's hands.

5. Fire prevention. Do not bring lighters, matches, fireworks, small firecrackers and other dangerous goods into the campus, and put an end to playing with fire and setting off fireworks and firecrackers.

6. Prevent accidental injuries. Sharp tools such as cones, knives and scissors are not allowed, and stationery is not allowed to be placed on tables and chairs at will to avoid accidental injury.