Lao Lin's math class is generally very casual.
It is the fourth teaching day of the summer camp, and there are still six days before the midterm elimination exam.
Lin Chaoxi and Pei Zhi continued their part-time work in the cafeteria, but this time, Huajuan and Lu Zhihao no longer slept in. The young boys got up early and went to work in the cafeteria with them.
However, this loyalty is mainly due to Lao Lin.
——
In the cafeteria of Oasis Base, Lu Zhihao stood in front of Lao Lin eagerly, expressing his desire to continue the class.
Lao Lin was mopping the floor and yawning.
"What class are you having so early in the morning?"
"But Master, we are going to have the midterm elimination exam soon," said Lu Zhihao.
Lin Chaoxi was so sleepy that he was still rubbing his eyes. Hearing him shout like that, he suddenly perked up: "This is my master, you can't copy me!"
"Then...then what's my name?"
"They are all false names." Old Lin turned around, caressed Lu Zhihao's hairy head lovingly, and said, "Just call me Master."
Lu Zhihao: "Master!"
Lao Lin: “Hey~”
Lin Chaoxi was so angry that she almost died. She found that ever since that day when they had a loving conversation in the rain, Old Lin had changed.
Lu Zhihao was very happy that Lao Lin was willing to accept him as his apprentice. He was flattered and took out the book quickly and asked earnestly: "Master, can you teach us geometry today?"
Lao Lin continued mopping the floor: "Why do you suddenly want to learn geometry?"
"Because... because I have an exam today..."
"Then take the test."
"But, but I still have a lot of things I don't understand. I'm afraid I won't pass the exam."
“Why are you afraid of failing the exam?”
The more Lao Lin asked, the more nonchalant he became, and Lu Zhihao became more and more confused.
Lu Zhihao: "Because... because..."
Huajuan: "Because if we can't pass the test, we have to pack up and go home~"
Lao Lin finally stopped and looked back at Huajuan.
Lao Lin: "Do you think I'm going to ask why you're afraid to pack up and go home?"
Huajuan nodded vigorously several times.
Lao Lin: "But what does this have to do with me?"
Lin Zhaoxi: “…”
At this time, Lao Lin said earnestly: "Whether you can do well in the exam has nothing to do with me. Because if I have a child, I will tell him that learning itself is a happy process. While enjoying knowledge, don't be afraid of challenges. The so-called exam is essentially a cruel elimination standard set by the whole society. It can require many people, but if you don't care, then it is not that important."
Huajuan and Lu Zhihao were both stunned and looked up at Lao Lin.
Lin Chaoxi, on the other hand, lowered his head, feeling a little sad. His father was really too open-minded.
Lao Lin probably thought that they didn't understand what he was saying, so he curled his lips and changed his words: "I mean, I can't guarantee that you can do well in the exam, so are you still willing to follow me and learn what mathematics is?"
Lu Zhihao, Hua Juan, and Pei Zhi said without hesitation, "Yes!"
"What about you, smart little girl?" Lao Lin moved his gaze towards her lazily.
Lin Zhaoxi: "I think you say this, but..." You can't believe a word you say, "Okay."
"Very good!" Lao Lin said, stretching his palm in front of her. "Since everyone is almost willing, then we have reached an agreement?"
The four of them subconsciously put their hands on it.
Lao Lin: "Since everyone doesn't have any big aspirations and is basically bored, why not just learn it casually?"
Everyone started nodding together for some unknown reason.
Lao Lin asked Lu Zhihao: "What do you want to learn, little friend?"
Lu Zhihao's face wrinkled up, and he seemed to want to say, "Then Master, I want to learn geometry"...
Lao Lin pondered for a moment and said, "Let's talk about number theory today, shall we?"
——
Lin Chaoxi had been teased by Old Lin for so many years that she was basically immune to it. But Lu Zhihao Huajuan, who was so innocent and cute, was still basically in a state of confusion.
In fact, Lao Lin did teach geometry after all. He had limited teaching materials to use. After looking at their school bags for a long time, Lao Lin simply told them to tear up their exercise books and continued to draw and do handicrafts.
There were rustling sounds coming from the long dining table. The sky was not yet fully bright, but the aroma of steamed rice from the cafeteria filled them with a very strange, warm and relaxing atmosphere.
Lao Lin called on Lu Zhihao by name: "You just mentioned geometry. Tell me, what do you think geometry is?"
"Shapes...circles, triangles, squares...whatever..."
“There are also line segments!” Hanamaki added, “Line segments and points count, too.”
Lao Lin nodded and smiled: "Have you finished the equilateral triangle I asked you to make just now?"
Lu Zhihao and Huajuan each raised one. Lin Zhaoxi and Pei Zhi still had work to do, so they secretly went over to listen.
"How do you say that the sides of the triangle you made are equal?"
"I...I measured it!"
"The amount of light is not enough." Lao Lin did not comment, and smiled: "We have already said yesterday that the subject of mathematics is a process from scratch, but it is not only mathematics, physics, chemistry, and other natural sciences, they all have a long process of subject construction. Please note that at that time, all mathematics-related knowledge was relatively scattered. But at this time, there was a person who combined all the scattered knowledge in a way and established a strict deductive argumentation system for mathematics, opening a precedent for human civilization and setting a model for all disciplines in the future. All of this is concentrated in a book called "The Original Geometry"."
"A few miles!" Huajuan answered quickly.
"Yes, please remember this name and this book." Lao Lin said, "In a sense, modern human scientific civilization is built on the logical system of this book. Its most exquisite part lies in its interpretation method and rigorous argumentation process." Lao Lin curled his lips, "If a math student tells you not to read The Elements of Geometry because the geometry it talks about is outdated for modern mathematics, it must be because he did not read this book when he was a child. We should sympathize with him."
“So, lucky kids~” Lao Lin asked them to take out their pens and continued, “Let’s take a closer look at what The Elements of Geometry actually talks about. First, it makes 23 definitions at the beginning…”
Pei Zhi put down the tray, sat in front of Lao Lin, and began to listen carefully, but Lin Chaoxi got up to do other things.
When she was young, she once sat at a small desk by the window and listened to Lao Lin's passionate lecture on "The Elements of Geometry". Enthusiasm is the most contagious thing. That was the first time she experienced the rigor and beauty of mathematical thinking. She can still feel the sudden enlightenment and excitement of the moment of proof.
——
The morning study time was very short, especially since the lecturer was Lao Lin. Two hours seemed to pass in the blink of an eye.
Lu Zhihao and Hua Juan were still reluctant to leave the cafeteria. Pei Zhi walked forward with his schoolbag on his back, saying nothing.
More and more people were on their way to school, and many children were holding books. But even Lu Zhihao no longer took the time to read.
Hua Juan jumped a few steps, then stepped back and patted Pei Zhi on the shoulder: "Brother Tiancai, do you still find math boring?"
Pei Zhi: "I stopped being bored a long time ago."
Lin Chaoxi pricked up his ears when he heard this.
"But aren't those things too simple for you?"
“There is no contradiction between simplicity and beauty.”
Pei Zhi said so.
Hua Juan was stunned: "Why are you talking like a master?"
"After listening to him for so long, of course he must be like a master."
Hearing this, Lin Chaoxi felt something was wrong. Why did even Pei Zhidu start calling Old Lin "Master" so seriously?
"Wait a minute, that's my master!" she protested seriously.
"Yeah, Master always likes to say those words." Huajuan and Pei Zhi walked forward while chatting.
"Master also likes to talk about Brother Juan, hahaha." Lu Zhihao also came over and didn't listen to what she said at all.
Red flowers and green trees sway gently in the wind, and sunlight filters through the gaps between branches on the path leading to the teaching building.
Looking at the backs of the three of them, Lin Chaoxi suddenly laughed.
——
Although for them, learning mathematics has become a seemingly "casual learning" process because of Lao Lin's arrival, it is actually very different.
But for other students in the junior high group of the Jinbei Summer Camp, the shadow of having to pack up and go home if their grades are too bad still exists.
Teaching building, classroom for the primary and high school groups.
When he arrived at the classroom on the fourth day, Lin Chaoxi discovered that the seats in the classroom seemed to have changed.
But the so-called change of seats does not mean that someone moved the table, but that the groups that originally sat together changed. Some people sat in the front, and some went to the corner. In short, it seemed that cracks had appeared between many groups that had originally had a good relationship.
She poked Pei Zhi, pointed to the seat in the classroom, and asked in a low voice: "Brother Genius?"
Pei Zhi glanced around the classroom and answered concisely: "The students in Group 7 who scored 31 points yesterday, the students in Group 5 who scored 44 points, and the students in Group 6 who scored 45 points were all kicked out of their respective groups and moved to other places."
Lin Chaoxi took a breath of cold air.
Hua Juan clasped his fists towards them and said, "Thank you three classmates for your kindness to me. I will never forget it!"
Lu Zhihao pushed him.
Pei Zhi continued: "The student from Group 6 who scored 76 points yesterday went to Group 3, and the one from Group 7 who scored 82 points went to... Group 1..."
When Pei Zhi said this, Lin Chaoxi's gaze shifted to the first group, which was Zhang Liang's group.
Sure enough, a new person took the seat in front of Zhang Liang. That classmate turned around and started chatting with Zhang Liang and the others. As he talked, he started laughing and seemed very sociable and happy.
Lin Chaoxi couldn't help but go to see Chen Chengcheng.
Student Chen Chengcheng still sat behind Zhang Liang and was not kicked out of the group, but he kept lying on the table and looked very depressed.
When the class was about to start, Zhang Liang and his friends were talking about something, but suddenly everyone went to see Chen Chengcheng.
Zhang Liang said something to Chen Chengcheng.
Classmate Chen Chengcheng looked back at her and lowered his head even more. Lin Chaoxi frowned.
At this moment, Zhang Liang suddenly looked at her with a very provocative look.
Lin Chaoxi was very confused. What was she doing? She didn't want to do anything heroic or set up a study group for poor students...
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