After the morning reading, Ren Changjiang, as usual, took out the set of mistakes and consolidation exercises summarized by Tao Li for him, and began to do it seriously.

This is a habit that Ren Changjiang has just developed these days, if he stays in the past, after the end of the morning reading, the first thing Ren Changjiang has to do must be to lie on the table and sleep, where will he be in the mood to do the topic. But now it's different, Tao Li is so attentive to him, he insists on tutoring him every day, even if it's not for the opportunity to play games, Ren Changjiang also feels the need to perform well for Tao Li!

There are still more than ten minutes before the first class, and Ren Changjiang hopes to use this time to read the part of the wrong question set that he didn't have time to read last night.

"You'll be able to play a few games tonight, scumbags, tremble!"

Thinking of this, Ren Changjiang's speed of reading the question couldn't help but get faster.

"What are you looking at? are you looking at it so seriously, game strategy?" Ma Xiaotian, who was at the same table, suddenly leaned over and asked curiously.

"What kind of game strategy, I'm looking at the wrong question set!" Ren Changjiang replied without raising his head.

"What kind of wrong question set?Ajiang, did you burn out your brain, when did you become so fond of learning?" Ma Xiaotian said with a look of surprise.

In addition to all the questions that I often get wrong, there are also many exercises and knowledge points summary, which I think are better than those reference books sold in the bookstore!" Tao Li finally raised his head and said after writing a question.

"Ren Changjiang, what did you just say? Mr. Tao also specially summarized the wrong question set for you?"

"I've wanted to ask you for a long time, where did you go to the first evening self-study every night?"

"It can't be that Mr. Tao is secretly opening a small stove for you!"

…………

As soon as he heard the words Mr. Tao, several girls soon surrounded him, and the girls in Class 18 were full of curiosity about this handsome trainee teacher.

"Well, Mr. Tao will give me tutoring every night! In addition to this book of wrong questions, there are also these tutoring materials and consolidation exercises, all of which are tailored by Mr. Tao according to my actual situation!"

As he spoke, Ren Changjiang took out all the materials and exercises from his schoolbag and proudly displayed them in front of everyone.

"I envy you so much! If I could be alone with Teacher Tao for a while every day, I would faint happily!" one of the girls put her hands on her chest with a look of envy.

"Does Teacher Tao still recruit students to make up classes?

As soon as this sentence came out, the rest of the girls looked at Ren Changjiang with their eyes, obviously also interested in this question.

As for whether he will make up for other students, I don't know. Ren Changjiang scratched his head, being stared at by so many girls, he was not used to it for a while.

"Teacher Tao is really too high!"

"It doesn't matter if a person is handsome, but the teacher is so good! It's over, I've completely fallen!"

Nowadays, high school teachers who are a little famous, especially math teachers, often pay hundreds of fees for a class hour, and many teachers' tuition fees are even higher than the normal salary.

"Teacher Tao is here!"

I don't know who shouted, and the originally noisy classroom immediately fell silent, and everyone looked towards the door in unison.

"Good morning, everyone! Today's math class will be taught by me, I just came to familiarize myself with the podium environment in advance, what should you do, don't worry about me!" Tao Li greeted everyone with a smile.

At this moment, the whole classroom was boiling in an instant, and everyone was cheering excitedly, especially those female students who had coveted Tao Li's beauty for a long time, and they were even more exclaimed.

Looking at the lovely students below, Tao Li smiled, and then began to do some pre-class preparations.

With the ringing of the class bell, Chen Tianxiang, who had been delayed for a long time, finally appeared at the door of the classroom, and behind him, he was followed by Zhou Zhihui, Yang Zhongming and other teachers from seven or eight teaching and research departments, and even Wang Zijing and Li Jianneng.

"Is this a group of relatives and friends or a jury!" Seeing that so many people came at once, Tao Li said helplessly.

"Hahaha!" The students below were immediately amused by this sentence, and Tao Li's originally nervous mood was slightly relieved.

Looking at the students and teachers sitting below, Tao Li took a deep breath and tried to relax himself, after all, it was his first class, and it was definitely false to say that he was not nervous at all.

"There is a very important law in astrophysics, called Kepler's law, in which the first law says that the orbit of all planets around the sun is elliptical, and the sun is at a focal point of the ellipse, so this law is also called the elliptic law. ”

As he spoke, Tao Li opened the first page of the courseware again, and on the projector at this moment, it was the trajectory of the eight planets revolving around the sun, and it was obvious that it was an ellipse.

"Let's look at another animation, give you a cone, give you a plane, use the plane to cut this cone, what kind of shape will the cross-section get?"

Immediately after, Tao Li opened the next page of courseware.

"Round!"

A student immediately replied.

"Very good, very correct. If you cut it horizontally, it's really round, but if you cut the cone diagonally on this plane, will it still be round?"

"No! it should be an ellipse!"

This time it was a girl who answered the question.

"That's a great answer! Let's look at the animation. ”

As he slowly entered the state, Tao Li's mentality of lecturing gradually relaxed.

Chen Tianxiang and Yang Zhongming, who were sitting in the back and listening to the lecture, were full of appreciation in their eyes, and the introduction of the concept of ellipse with such two examples is still unique in teaching. Moreover, when Tao Li speaks, his attention is focused on the students, unlike many teachers who stare at the PPT and blackboard throughout the whole class when they are in class for the first time, and there is little communication with the students, which is a fatal mistake for teachers.

Teaching is the interaction between teachers and students!

"Okay, ellipse, that's the first concept we need to remember in this lesson, let's take a look at these two functions, y=x^2 and y=1/x, can anyone tell me the images of these two functions, what are they called?"

Tao Li asked as he wrote the word "ellipse" on the blackboard.

"Parabola and hyperbola!"

Of course, such a simple question is difficult for students.

"Very well, parabola and hyperbola!" Tao Li smiled, and then wrote these words on the blackboard.

"Let's take a look at what the images of these curves look like. ”

Tao Li first took a piece of chalk and prepared to draw an elliptical figure, but as soon as he turned around and was about to start, Tao Li hesitated, then turned around again, and took another piece of chalk under the gaze of everyone.

Just when everyone didn't know what Tao Li was going to do, a scene that shocked everyone appeared: I saw Tao Li on the podium holding a piece of chalk in his left and right hands, and began to draw images on the blackboard at the same time, and the images drawn by the two hands were still different!

The left hand draws an ellipse!

The right hand is a hyperbola!!

And when Tao Li turned around again, everyone, including the teacher who came to listen to the class, fell into silence at the same time, and their eyes were full of incredulity:

The two images on the blackboard are not like freehand drawing, they are exactly like software drawing, from the coordinate axis, to the ellipse and hyperbola, the bend of the bend, the straight of the straight, every rounded arc, the excessive is so natural, and even the thickness of the line is the same!

The point is, this is still drawn by two hands of one person at the same time!!

Zhou Botong said that the left hand draws a circle, and the right hand draws a square!

And Chen Tianxiang has only one thought at the moment: this kid won't minor in the art department again!