This is the basis of preview. The first thing to do is to read the textbook, think while reading, clarify the concept, draw out the knowledge points and understand the main content.

The process of preview is the process of seeking doubt. In the process of preview, you should mark the key points and difficulties with a pen, or you can write your own understanding and experience in the blank space of books or notebooks. If you don't understand, you should put a question mark or write it down, so that you can listen to the class with questions and the classroom efficiency will be higher.

2. Calculation formula

Learning mathematics is naturally inseparable from formulas. Regarding the formula, some textbooks have a general derivation process, while others do not. Either way, it is suggested that students can try to derive their own formulas in preview, which is very beneficial to cultivate children's ability to analyze and solve problems independently and guide children to find their own knowledge defects.

Usually, if you can't interpret, you won't make mistakes, either you don't understand enough knowledge, you haven't learned it, or you forget what you have learned. As long as you make up for it, you will make progress.

3. Clever induction

There will be a lot of theorems, laws, formulas, concepts, special symbols and so on. In mathematics learning, what are the very important knowledge points that need to be firmly remembered.

When previewing, we should separate these contents together, copy and summarize them regularly, summarize them constantly and deepen our understanding. For example, when previewing "positive and negative numbers", some children will sum up such a formula: 0 as the benchmark, left negative and right positive.

4. Review old friends and learn new preview methods.

This is a preview of the connection between old and new knowledge. In the process of preview, on the one hand, we get to know the new knowledge, summarize the key points of the new knowledge and find out the difficulties, on the other hand, we review, consolidate and cram the old knowledge associated with the new knowledge. When it is required to preview new content, it should be connected with the old knowledge that has been learned, so as to "review the old knowledge and learn the new", contact the old knowledge, learn the new knowledge, and make the knowledge systematic.

5. Try to practice preview.

For the new calculation teaching practice class, try to practice first when previewing, and then return to previewing examples when encountering difficulties, and then try to practice. By trying to practice, students' preview effect can be tested, which is an indispensable process of math preview. Mathematics is different from other disciplines-the main feature is to use mathematical knowledge to solve problems. Students have initially understood and mastered new mathematics knowledge through their own efforts, so students should test their preview effect by doing exercises or solving simple problems.