30,

In the dormitory.

Inside.

Night.

Liu Nan took a homework book and said to Xu Hong: "Teacher Xu, look, there are several children in the fifth grade who are not good at math, are not focused in class, and do not pay attention to listening to lectures. They do all their homework after class."

Xu Hong took it over and looked at it, nodded: "Well, there are ten questions here, four or five of them are wrong."

Liu Nan wondered: "Why do you think this is? Ah!"

Xu Hong thought about it and then said to her: "In my opinion, this is mainly caused by their lack of interest in learning mathematics."

Liu Nan: "Yes."

Xu Hong: "Liu Nan, you know that interest in learning is the main psychological component of learning motivation, and it can encourage students to actively explore knowledge. If a student is not interested in a certain subject, he will not only have no enthusiasm, but will gradually develop disgust for it."

Liu Nan: "Yes! There are a few classmates in the fifth grade class. Whenever I take math class, they must be doing small moves below."

Xu Hong: "This is their performance. If they have no interest in mathematics, of course it is impossible to learn it well. We know that Darwin was a great biologist, but he was a very mediocre child when he was a child, but he developed a strong interest in nature and went to the wild to study and collect specimens with great enthusiasm. Later, he finally wrote a great work "Theory of Biological Evolution".

Liu Nan looked at her and asked, "Teacher Xu, how do you think we can stimulate students' interest in learning?"

Xu Hong thought for a moment and said, "Well, this is a problem that we will explore in the teaching process for a long time in the future. In fact, every student we teach has a strong curiosity. In the future, we should be good at grasping the children's psychology, arousing their curiosity, and allowing them to actively participate, guess and imagine. This may gradually mobilize their enthusiasm for learning and make them have a strong interest in learning."

After hearing this, Liu Nan nodded heavily.

31,

In the classroom.

Inside.

day.

After finishing the class, Liu Nan put the textbook on the table and said to the students below: "Students, I will tell you a story about ancient mathematicians. Are you willing to listen to it?"

The students said in unison: "I'm willing."

"Okay!" Liu Nan looked at everyone and continued: "The name of this mathematician is Zu Chongzhi. He has been interested in scientific research since he was a child, paid attention to learning the achievements of his predecessors, and made great contributions in many aspects. The most prominent thing is that he calculated Pi more accurately in the field of mathematics. This achievement is nearly a thousand years ahead of the world."

The students all focused their eyes on Liu Nan.

Liu Nan: "Students, do you know what method he used to calculate it?"

There was no answer in the classroom.

Seeing that everyone was not talking, Liu Nan said in time: "Okay! Then let me tell you that he used and developed the 'circle-cutting technique' created by his predecessors to calculate the pi value to the seventh digit after the decimal point, that is, between 3.1415926 and 3.1415927."

At this time, a classmate began to ask curiously: "Teacher, what is the technique of circumcision cutting?"
Chapter completed!