In the wrong question analysis card, I often don't specify the number of questions, just tell them what you think is worth analyzing, and then analyze it clearly. I hope that children can understand the purpose: to avoid making similar mistakes in the future, and to understand this problem in depth, which can also provide a good understanding path for others. In the wrong cards collected, I found that the children's topics were quite suitable, and everyone's analysis also had their own characteristics.

Although some children can't analyze the cause of the mistake in place (after all, the psychological anatomy of the mistake is more difficult), it is also good to express the solution clearly and understand how to solve this problem and how to do it correctly.

In addition to the wrong cards, students often encounter many problems in the review process. After communicating with the children, I learned that the reason was: I thought I understood it at that time, but I forgot it every few days, and I couldn't understand it at once, and I was at a loss. So I asked the children to make their own puzzle analysis cards, record their own puzzles on the puzzle cards, and collect the puzzle cards one by one in the review process. This is not only convenient for them to review and review (this is the function of the puzzle card), but also helps children to establish good math study habits.

1. Several points of making a puzzle card ① Determine the scope of this puzzle set (generally defined by the teacher); (2) Students should first browse all the exercises within the scope of problem collection, find out the problems that they think need to be collected, and determine the serial numbers (usually they should get into the habit of circling the serial numbers of the problems that they find difficult while doing); (3) According to the determined number of questions, plan how much area each question needs to record; The goal of recording is to use eighteen martial arts such as marking, memory and painting. Let you understand the problem-solving strategy of this problem (at a glance)-focus on the methods that are convenient for you to understand and remember.

2. Several points for attention in making jigsaw puzzle cards ① The words should not be too big, and the records should not be too full, so that it is convenient for you to check; ② Difficult card is different from wrong card. Puzzle cards are used to help you review, review and remember. You don't have to analyze in detail why you are wrong like a wrong card, but you should focus on how to do it. Illustrated with pictures and texts, it is better to focus on marking.