On Monday, the six classes of the third grade of high school were notified by the mathematics teacher that the evening self-study was unified by Yang Fan, a student from the third and third classes, to explain the midterm exam papers.

Sensational school.

This is an unprecedented move in the 20 years since the establishment of the High School. If you usually help each other, the communication has passed.

What is this time? It's an open class.

Don't say that you don't have your own school, if you put it in the whole of Wuzhou, you won't have it. What does it mean to have students as substitute teachers?

The name Yang Fan, in the past month, has been bombarded in the school continuously, and all kinds of actions are incredible, and the hegemon of contemporary mathematics is well deserved.

When it comes to lecturing, isn't it too much?

At 6:50, the lecture hall was already crowded, and all the three or six classes of high school were all there.

In the first and second years of high school, the math teacher has asked each class to send two to five class cadres to observe, not to listen to the paper questions, but to listen to mathematical thinking.

Chen Changyi arranged for each class to sit down, and the first class of high school was placed in residence. Two rows per shift, up to the twelfth row. There are also remaining seats on both sides, and the front is given to the first- and second-year high school students who are auditing. Only in this way will the teachers have no opinions.

"Remember to bring your phone or voice recorder. Chen Changyi shouted loudly.

"Teacher Chen, bring it all. ”

"We are prepared. ”

Chen Changyi nodded and looked at the rear on the left, where all the high school math teachers were all there, and they also brought electronic devices, while behind the right were scattered people at all levels, junior high school students, and teachers of other subjects in high school.

Even the principal Qu Mengxiu is among those people, and the school attaches great importance to this open class.

As soon as I looked at the time, it was almost time, and the long-awaited protagonist had already arrived at the door. Chen Changyi left the podium to him and ran back to the high school math group by himself.

Yang Fan went to the podium, spread out the scroll, supported the edge of the table with both hands, and looked calm and serious.

"There's nothing to be nervous about. Yang Fan said secretly, "It's not the first time, one or two thousand people can shout in front of them, three hundred people, that's it." ”

Put the headset on and look down calmly.

Offstage, Qu Mengxiu sat in a bunch with several school leaders.

"With this mentality and bearing alone, it is a distance from ordinary students. Qu Mengxiu said with emotion.

"Yes, Headmaster, this student doesn't look like an eighteen-year-old at all. I remember the first time I was teaching a class, my legs went so weak that I almost couldn't get off the stage. ”

There are six classes in the third year of high school, and they are concentrated in front of the podium. When the student looked up, there was only one figure in his eyes.

First Qiming had all kinds of complications on his face, his grades dominated the same level for three years, and no one proposed to let him teach others and so on.

"I hope you go further, and there is still the water source of the river......" Cui Qiming muttered in a low voice. Yang Fan and Jiang Shuiyuan are two mountains pressing on his heart, and the same scene seems to have appeared again.

The river water source is in the second semester of the third year of junior high school, and Cui Qiming, who has dominated for three years, is in a dominant position, and Cui Qiming is the third in the city during the high school entrance examination, and he is unwilling to go to the ninth middle school, because he doesn't want to see the hypocritical face of Jiang Shuiyuan.

However, three years have passed, and the city's unified examination, Jiangshuiyuan ranks first in the city every year, and Cui Qiming hovers between three and five.

A bell rang, waking up Xiao Hongye, who was a nymphomaniac. She wiped her saliva and wanted to speed things up.

"Hey, hey. The headset worked well, Yang Fan smiled and said: "Hello everyone, I am Yang Fan in the third class of high school, and I will explain the midterm paper to you today, if you have any questions, you can boldly raise your hand." ”

The classroom was silent, and no one spoke.

"The first question, multiple-choice, is answered A. If you are wrong, please raise your hand. ”

Dozens of hands were raised in the third year of high school.

There are six classes in the third year of high school, because there are 254 people, and there are 253 people. The number of people who raised their hands was 14, accounting for about 5%, and this question was passed.

"Because of the time constraints, this question is asked by the students themselves. In the next question, choose B. Raise your hand incorrectly. ”

18 people raised their hands, accounting for 7%, this question passed.

"The third question, the answer is B, raise your hand. ”

......

The usual beginning made several math teachers suspicious.

"That's it, isn't it ......?"

"We're looking for the right reasons. ”

"What does Teacher Chen think?"

Chen Changyi was about to speak, when a cold snort sounded in his ear: "If you don't have patience, you can go, don't make noise." ”

Such an arrogant voice, and in the pile of math teachers, there will be no one else except Feng Yao.

"Wait. "The good old man Chen Changyi said.

Li Jianxing, a student representative of the first year of high school, is the third oldest in the midterm exam. Hearing the discussion of the math teacher behind him, he smiled, Mr. Feng did everything for the sake of that student, and he had to jump out and die.

That senior is the one who specifically shocks people, the more bland the beginning, the more amazing it is in the later stage. Li Jianxing glanced enviously at the stage, if he had the opportunity to have an open class, then his life in high school would not be in vain.

The beginning is like water, all the way to the eighth question.

"Pick D, raise your hand. ”

83 people raised their hands, more than 30%, controversial.

"Okay, now, let's take a look at this question and why so many people are wrong. ”

The drowsy listeners were shaken and came.

In this question, B and D are very similar, and it is because they chose B that they raised their hands wrongly. ”

82 and 68 hands raised.

"That's it, most of the students are wrong because they were disturbed by B. Let's look at the content of the question, and the method here may be different from that of the teacher. First of all, we first think that B is accurate, and then deduce the question from the back, and directly bring in B as the answer, whether it is feasible. ”

In △ABC, the opposite sides of the inner angles A, B, and C are a, b, and c, respectively>.

A: 5/6 πB, 2/3 πC, 2/6 π

According to the sine theorem: asin Bcos C + csin Bcos A = half b

......

At this point, it is clear at a glance that B is wrong to bring in and out of the question. If selling B is the correct answer, how should we change the question? Who knows, please raise your hand. ”

Brush, more than 100 hands raised at the same time.

"Pretty, so pretty. A teacher in the mathematics group said excitedly, "This is to use one question as two questions, and consolidate the knowledge points twice." ”

"Not only that, but reversely deducing the problem is to completely dissect similar problems. It can be said that these students will not get the same question wrong a second time. ”

"As the saying goes, everything is always changing. A knowledge point, in fact, is the same as the old three, this method is very good. ”

The buzz of the math teacher does not affect the whole class at all.

Yang Fan looked at the classmate who raised his hand, and pointed with his hand: "Well, that ......"

Immediately stunned, the classmate himself couldn't name him, how to name him. You can determine a certain one from your own perspective, and the student's perspective seems to point to them.

One finger, spread to the audience, a few can point out five people.

Thinking of this, Yang Fan said: "Ladies and gentlemen, I ask you to change your seats, no problem." ”