At the opening ceremony, Principal Wang introduced the teachers of each class.
Jiang Yun's math teacher was Cao Baosheng, a math teacher at Beijing University. He was sent to the county town to receive re-education in response to national policy.
The first class on the first day of school was Cao Baosheng’s mathematics class.
Mathematics class has always been the students' weak point, and their math foundation in junior high school was not well laid. Therefore, when Cao Baosheng was drawing on the blackboard, the students below either stared at the blackboard in a daze or talked in gossip.
While Jiang Jun was whispering with He Xiangdong, he opened the book to see which picture Cao Baosheng had drawn.
When Cao Baosheng started teaching, that is, when he started talking to himself with the textbook in hand, Jiang Jun was pleasantly surprised to find that Teacher Cao's lectures were really great!
He Xiangdong asked in surprise: "Xiaojun, do you understand?"
Jiang Jun shook his head: "I don't understand. His accent is quite nice."
He Xiangdong blinked: "Really! His Mandarin is pretty standard! Hehe, if you hadn't said it, I would have thought you really liked the class."
Jiang Yun really liked Teacher Cao’s math class.
In her opinion, Cao Baosheng is a top student in the field of mathematics. He can explain abstract topics vividly and interestingly. He will be a rare talent even in the future!
Every day when Jiang Jun returned home, he would review the knowledge in the book two or three times, and then go to class to listen to how Teacher Cao taught.
In any case, she had thrown away the knowledge she learned in middle school for many years.
She needs to know what's going on.
No one was listening carefully or didn't understand, so she couldn't pretend to understand.
When school was over on Saturday, He Xiangdong was sweeping the floor in the classroom, and Jiang Jun went to push the bicycle first. She happened to see Teacher Cao wearing an old cotton-padded jacket and also came over to push the bicycle.
Seeing no one else around, Jiang Jun quickly asked, "Teacher Cao, I'd like to ask, when calculating the shadow area of the cube we talked about in class today, can we use algebraic methods?"
Teacher Cao was surprised that there were students asking about what they were teaching. He was so excited: "Of course you can! You can even use the law of sine to prove it."
Jiang Jun was a little confused: "Huh? Trigonometric functions? I don't think I understand!"
Teacher Cao was even more excited: "You also know trigonometric functions! You you you..." Cao Baosheng said three yous in a row and patted the bicycle seat: "When I come back to teach next week, I will bring the book to you. Come to my office and I will explain it to you."
Jiang Jun nodded and smiled: "Okay, thank you Teacher Cao. Teacher Cao, where are you going?"
Cao Baosheng looked at his watch. There was a hole in his left cuff, and a bit of cotton had leaked out. It had turned yellow and black. "I have to rush back to Jingcheng University. I have a wife and children at home."
It takes at least three hours to ride a bicycle from Liujiaji County back to Beijing. It must be after eight o'clock when Cao Baosheng gets back. It is windy and cold at night, so it is wise to wear a cotton jacket.
Jiang Jun quickly said goodbye to Cao Baosheng: "Teacher Cao, be careful on your way!"
Cao Baosheng's bicycle was a second-hand one, and the wheel rims were old and rusty. He pushed it out and rode it, making a creaking sound all the way out of the school gate.
Jiang Jun watched Cao Baosheng walk away before she went to push her own bicycle. She, a student, had a bicycle that was newer than her teacher's, which made her feel a little uncomfortable.
"Don't look anymore, they've all disappeared." Xu Zhijian said with a smile behind Jiang Jun, "Are they still seizing the opportunity to have some private lessons?"
Jiang Jun turned around and saw Xu Zhijian and Chen Yuefei standing together. They were also pushing bicycles. "I just wanted to say hello to the teacher."
Xu Zhijian laughed: "Come on! I heard everything, and you're still talking about trigonometric functions! Hey, tell me, how do you know trigonometric functions?"
Jiang Jun glanced at Chen Yuefei and said, "I'll tell you only if you promise not to tell anyone!"
Chen Yuefei stood at attention and saluted again: "I promise the great leader that this will be kept absolutely confidential!"
Jiang Jun whispered, "My father knows a little bit. He told me secretly. But he told me not to tell anyone."
Xu Zhijian was puzzled: "Why can't I say it?"
Jiang Yun said, "My mother doesn't allow me to learn."
Xu Zhijian and the others knew how powerful Zhang Xiuying was, and they immediately understood Jiang Jun: "Okay, I promise not to tell anyone! Go tell them to hurry up, we'll wait at the school gate first."
There is a relatively desolate section on the road, and girls would be a little scared to ride their bikes there in broad daylight, so everyone goes to and from school together.
The conversation between Jiang Yun and Teacher Cao was still seen by other students.
So, on Monday morning, when Cao Baosheng hurried to the classroom for class, he saw a line of words written on the blackboard by some naughty boy:
Teacher Cao, three treasures, a broken car, a broken jacket, and a broken watch!
With sweat still on his forehead, Cao Baosheng walked into the classroom, put down the teaching aids, picked up the chalk and prepared to draw on the blackboard.
Seeing the words on the blackboard, Cao Baosheng raised his wrist and shook it, then tugged at his cotton-padded jacket. He glanced out the window at the bicycle shed, then slowly scanned the class and gave a thumbs-up. "That's a very accurate summary! Good!"
Teacher Cao coughed and said, "They are truly three treasures! A broken car, without a bell, people will move aside when they hear the noise from far away, and there's no need to worry about it being stolen. Same thing with a broken jacket, no one will steal it. Same thing with a broken watch, no one will steal it."
The class burst into laughter.
Jiang Jun also laughed. She didn't expect that Teacher Cao, who looked dull and old-fashioned, would have such a humorous and witty side.
Unfortunately, despite being humorous, Cao Baosheng couldn't help but feel happy. During the lecture, he kept asking questions: "Right? Do you understand? That's how it is, right?"
Chen Yuefei and Xu Zhijian knew that Teacher Cao was actually asking Jiang Jun if she understood. Whenever Teacher Cao asked a question, they couldn't help but look at Jiang Jun to see what her expression was like if she understood.
Jiang Yun's performance amazed them both.
When she was in class, she was either chatting with He Xiangdong or scribbling in a notebook. Her homework book had grown to the point where there were three bamboo leaves on every page.
With the sharp eyes of an "investigator", Chen Yuefei finally discovered that although Jiang Jun was doodling or chatting, at the end of the class, he would always give Teacher Cao a sign that he had understood, sometimes nodding, sometimes blinking, and even He Xiangdong didn't notice.
"Holy crap!" Chen Yuefei was as excited as if he had discovered a promising talent. "I was wondering why she was so calm. This is the level of a special envoy!"
Xu Zhijian made another discovery: "What Teacher Cao was talking about was no longer in the textbook!" He flipped open the book and confirmed: "Look, when he first explained this diagram, I didn't recognize the pinyin letters he wrote. They weren't even in the textbook!"
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