Nowadays, many schools emphasize how teachers teach a lesson well, and seldom emphasize how students listen to a lesson well. Actually, the latter is also very important. Looking through our math class, it is not difficult to find that some students sit up straight and look at the teacher, but their hearts are in Cao Ying's heart, and the teacher knows nothing. They were at a loss when the teacher asked questions. These seem to study hard, but their exam results are not ideal. This situation sometimes makes our math teacher very helpless, and it is difficult to criticize these students who are serious in class but have poor grades.

In fact, the main reason for this situation is that these students are not good at listening to lectures. Students who are good at listening to lectures generally have strong information selection ability. They focus on some important information for a long time, but they are "easy" to some minor information. According to foreign psychological statistics, primary school students can keep their attention stable for 20 minutes, but in fact, many primary school students are far from reaching this standard. Therefore, how to improve the effective concentration time of primary school students' math class is a problem worthy of our math teacher's consideration.

First, let students develop the habit of previewing in advance and understand the key points of the lecture.

Preview can have a preliminary understanding of the knowledge to be learned in class, which is convenient for targeted and purposeful lectures and improves the efficiency of lectures. However, primary school students' self-study ability is not strong, so teachers need to put forward corresponding questions for them to think about when previewing. For some relatively simple preview content, let them try to do the homework of this lesson first, and students will be impressed by what they don't understand during the practice.

Second, let students learn to distinguish information and focus on it in class.

For students with low efficiency in class, a large part of the reason is that they can't distinguish the important information in the teacher's content and can't grasp the key points. This requires teachers to give hints in class ―― language is the best "bridge".

The math teacher's language is simple and clear. Sometimes in order to make students aware of some important information, we should pay attention to tone, intonation, rhythm and stress. When emphasizing knowledge points, we should increase evidence and improve our intonation.

In addition, math teachers should put important knowledge in the first 20 minutes of a class. At this time, students are in a stable attention stage, and effective attention is relatively high.