Cai Hongsheng, a famous special-grade teacher, has always been one of my elders. I remember he once said, "Go your own way and let others find that this is also a way!" " Cai Te's class has always had its own unique style: with the development of mathematics, let children experience the growth of knowledge.

Recently, I was fortunate to hear Cai Hongsheng's new work Understanding of the Times, which can be said to be a subversive work of art. The lesson Understanding of the Times belongs to the field of "number operation" in the 20 1 1 version of Curriculum Standards.

Now "New Curriculum Standard 2022" has moved the course "Understanding the Times" to the field of "Quantitative Relationship". It should be said that the emphasis from "number operation" to "quantitative relationship" is completely different. I benefited a lot from learning this lesson of Cai Te. Let me briefly talk about the following gains:

Mathematics Curriculum Standard for Compulsory Education (2022 Edition) proposes to cultivate students' core literacy, among which observing the real world from the perspective of mathematics ranks first in the "three sessions". In other words, mathematics should provide people with an observation way to know and explore the real world. From the perspective of mathematics, we can abstract the essence of mathematics from the objective phenomena in the real world.

In class, Cai Te simply counts and instructs the students. In math class, they should have a new pair of math eyes, that is, they used to count one by one, but today they have to copy one by one.

The same number, Cai's clever language aroused the students' interest, and then asked: "What's the difference between this?" Visual contrast clearly shows the students that 1 of the previous one is 1, while 1 of this one is more or less.

What a great discovery! The first characteristic of multiple is to find the standard quantity, that is, how many copies, that is, how many times. By creating a pair of new eyes, Teacher Cai lets children observe realistic problems from different angles, thus pursuing the essence of mathematics. I think children will become smarter and more open-minded in such classes.