Li Zhen finally became a teacher.

He enjoyed it very much and was not a good teacher. It's about enjoying the taste of spreading your knowledge.

Kyushu Academy of Sciences, majoring in mathematics, physics and chemistry.

Physics, the hardest.

A month later, the physics course of the Kyushu Institute of Physics was divided into three side branches: the School of Electromagnetism, the School of Mechanics, and the School of Power.

These three collateral branches are very thin collateral branches, and the contents all have a lot in common. Many people take it, and some people specialize in it.

Li Zhen wanders in this palace of knowledge, and he is very busy every day. Because the current teaching mode, all relying on Li Zhen alone, is a very unique teaching mode.

Li Zhen had to give a lecture to each academy during the day, and he had to give a different lecture every day, and the progress was very fast.

Other than that, there are no other teachers at the Kyushu Academy of Sciences. Everyone entered the stage of independent research and meeting and discussion.

The model of the former Kyushu Institute of Physics started at the beginning, and now it has developed into a group discussion study.

In the School of Mathematics, Li Zhen stood on the main lecture with the textbook in his hand, looking at the overcrowded group of listeners below. Among these people, not only people from the School of Mathematics, but also many people from the School of Physics also choose to take elective courses in mathematics. They are all very qualified, and the people in the School of Physics never sit in their seats, but they all give their seats to the people in the School of Mathematics.

They gradually realized the importance of mathematics to physics, which has a lot in common, and it is easy to intersect at a certain node.

"The Pythagorean Law. I talked a little bit yesterday, who knows the Pythagorean law, talk about it. ”

Li Zhen poked the four words 'Pythagorean law' on the blackboard with a triangle board and looked down.

Everyone looked at each other, you look at me, I look at you.

At this time, Hou Qiang stood up and said, "Master Li, I'll answer this question." ”

"You say."

"The Pythagorean law is roughly the sum of the squares of the two right-angled sides A and B of a right triangle equal to the square of the hypotenuse C."

Li Zhen nodded: "Hou Qiang, sit down." Yes, she's right, it's something from the Pythagorean law. But it's not entirely true. Does anyone else know? ”

Li Zhen looked down with some urgency, he hoped that everyone could continue to think differently and continue to study independently. Because every time Li Zhen gives a lecture now, he will leave a suspense for the next class and throw out a few points, the purpose is to let everyone study it by themselves.

Many people's thinking is influenced by the trend of Kyushu, and Li Zhen is gradually changing their thinking with all his might.

No one spoke anymore. Everyone was a little ashamed.

Mainly...... It's too hard.

"The Pythagorean law is a fundamental geometric law. Everyone knows the concept of geometry, right? ”

Li Zhen asked.

"Yes."

There was a faint sound of pulling below, and most of the people in the math academy were full of pride. A small number of people are full of shame, and a kind of hatred for themselves arises spontaneously. And the people in the School of Physics are anxiously scratching their ears and cheeks, they are all halfway monks, and they don't know much about these.

Li Zhen knew that many people did not know the concept of geometry, or could not understand the concept of geometry exactly, and he did not want to repeat what he had said.

Because the Kyushu Academy of Sciences is now in a mode of big waves and sands, Li Zhen is screening talented people to come out.

"The Pythagorean theorem is one of the most important tools for solving geometric problems with algebraic ideas, and it is also one of the links that combine numbers and shapes. Remember the mantra "hook three strands, four Xuanwu", and if you don't understand it, go back and study it slowly. ”

Li Zhen's tone became a little harsh: "Just like Hou Qiang said, calculate the right triangle, and get the square of the oblique angle C from the sum of the squares of the two right-angled sides AB. ”

Everyone lowered their heads and frantically recorded in their notebooks. Li Zhen's lecture progress is very fast, you will regret it for the rest of your life if you miss a sentence, everyone knows the importance of notes.

Li Zhen patted the table, waited for everyone to finish writing their notes, and then said, "Why should I talk about the Pythagorean law?" Can any of you know why I'm talking about the Pythagorean law? It's just a law, why should I focus on it? Who knows? ”

At this moment, a gray-haired man with reading glasses stood up. Li Zhen forgot the name of this person, but he knew that he was a math teacher at a public high school in Qingdao County, and he had been here for several weeks.

The old man stood up and said in a somewhat determined tone, "I probably understand some of Master Li's intentions. ”

"Old man, you say."

"As you said, the Pythagorean law is one of the important tools for solving geometric problems with algebraic ideas. It can be seen from this sentence that Master Li focuses on the Pythagorean law, and the purpose is not the Pythagorean law. ”

Li Zhen raised his eyebrows: "What is that?" ”

"Based on some of the lessons you have taught before, you can see that one of the things you emphasized is called thinking, which is called concepts. As you said, mathematics is an abstract concept, and there are theorems of various numbers in the abstract concept. All you want to teach is all kinds of theorems, and then let's think about why. ”

Li Zhenyi slapped the table: "Yes." You're right, and I'll mention it here today. Mathematics is divided into elementary mathematics and advanced mathematics. I summarize the difference between the two in the simplest sentence. One is to know what it is, and the other is to know why. “

"What you've learned, however high-end you think you are, I'm here to tell you today, is elementary math. It's just used for calculations, black is black, white is white, and the most used is addition, subtraction, multiplication and division. And higher mathematics is concepts, permissions, derivatives, and calculus. Higher mathematics is a concept, and again, it is a concept. It's a proper attitude, an attitude where you have to study why. You need to keep proving your conjecture, your attitude. ”

"As you continue to prove, you will understand the math better. There is no such thing as being completely understood, math does not mean that you can calculate all the addition, subtraction, multiplication and division, and you will never make mistakes, which means that you have learned it clearly. Everyone, put away your thoughts, this one discipline is never-ending. ”

Li Zhen's tone was extremely intense, and the people below were terrified when they heard it, and they didn't dare to make a sound at all.

After finishing speaking, Li Zhen looked at his watch: "After class." The main content of today's lesson is the passage I said above. Let's go back and study it carefully, and start tomorrow to officially explain the theorem to you. Let me say something else. ”

Li Zhen's tone was stunned, and a complicated look flashed in his eyes: "If other disciplines can rely on rote memorization, mathematics has talent." Learning advanced mathematics requires great talent. The concept of a function alone can brush down on half of the people in the room. I don't have time to make you proficient one by one, so the Kyushu Mathematics Academy is about to start a big wave. ”

Hiss –

The audience fell silent, biting their cheeks, and looked at Li Zhen on the podium in a daze.

"A month later, the Kyushu School of Mathematics began to carry out the examination elimination mode. The content behind it is very complicated, and some people will delay the progress, so they have to brush it down. After that, I will take an exam once a month, and I will write the questions about the exam. Those who fail will be eliminated. Those who have taken the exam, change classrooms, and I will focus on explaining. One month later, Kyushu Mathematics Academy began to implement one-on-one, precise lectures. As for those who have been brushed off, you can still listen to lectures here, but I will only give lectures once every three days, and for the rest, you can study the rest yourself. ”

After that, Li Zhen walked away quickly with the book in his hand.

Everyone in the entire math academy was in an uproar, and they all stood up and looked at each other. Some of them have poor psychological quality, and their bodies shake like chaff.

The big waves sweep the sand......

They are all afraid of being brushed off.

No one thinks they can pass the test, no one has that confidence. Including Hou Qiang, who is excellent in mathematics, was stupid on the spot at this time and lost his mind.

Those who came to the Physics Academy to audit looked at each other and said, "It seems that this is a very serious matter. ”

"This ...... The School of Mathematics has started to make big waves, shouldn't our School of Physics do the same? ”

"Alas, if this is eliminated, it will be a lifelong regret. I finally got into the Kyushu Academy of Sciences......"

"But also, I can understand Master Li's anxiety. Throughout the Kyushu Academy of Sciences, he taught all the courses alone. Where to teach, instead of casting a wide net, it is better to select people who specialize. ”

“……”