Ma Xiaotian was chatting with a few people, when two people suddenly walked in from outside, each carrying a camera on their shoulders, one of them placed the camera in his hand in the upper right corner near the front door, and the camera was aimed at Tao Li on the podium table, while the other person put the camera in the opposite position of the camera just now, and the camera was also aimed at the student sitting below.

At this moment, it was not only Tao Li and the students of Class 18 who felt strange, but Chen Ke, who was sitting in the back, was even more surprised!

"Old Ma, what is this for? It doesn't seem to be in the previous notice!" Chen Ke asked a little nervously.

"Look at what makes you nervous, it's the ordinary teaching video, and I also received a temporary notice asking me to choose one of the lessons I listen to to do a video. Ma Xiaotian took a sip of water and replied leisurely.

"Then why don't you choose Teacher Chen Tianxiang's class, isn't Teacher Chen's class better?" Yang Zhongming also hurriedly asked.

The rash appearance of teaching videos must have other uses!

"I forgot in the morning, if I don't record this afternoon, then my class will be over, but I won't have a chance!" Ma Xiaotian said embarrassedly.

"Old Ma, I won't go around the bend with you because of our friendship, you give me a thorough explanation, what is this camera for?"

Chen Ke was relieved and continued to ask.

"I really don't know what to do specifically, but I heard from the heads of other groups that this seems to be required by the Department of Education, and it should be related to the evaluation of the provincial secondary education base. Of course, I've only heard that there is no clear notice sent to me, so you can just listen to it. ”

Ma Xiaotian hesitated, but still said everything he knew. After all, he was born in Jinling Middle School. He also worked with Chen Ke, he used to be the head of the grade, and Chen Ke was the deputy director, emotionally speaking, Ma Xiaotian also hopes that Jinling Middle School can occupy a place!

Chen Ke and Yang Zhongming glanced at each other with a wry smile, both of them saw the helplessness in each other's eyes, after knowing that Ma Xiaotian was the person in charge of this spot check, the hearts of the two people also fell, with their relationship, as long as Tao Li did not play too badly, they had a way to let Ma Xiaotian score as appropriate, so as not to affect the school's participation in next year's evaluation.

But now all of a sudden, this annoying teaching video, this video. But if they have to hand it over to the Department of Education, if Tao Li does not perform well, no matter how strong their ability is, they will not be able to affect the score of the Department of Education! And what they can do now is to pray that Tao Li will not make trouble!

It's best if the two cameras suddenly run out of battery, or if they are lost in transit, that's even better!

"Old Ma, you can hurt us!" Chen Ke glanced at Ma Xiaotian and said with a wry smile.

"What, isn't this Teacher Tao's level good? Didn't Lao Yang just say that this young man was the most talented person he had ever seen?"

Ma Xiaotian said curiously.

At this time, the class bell finally rang, Tao Li sorted out his mood, skimmed all other distractions, and put all his thoughts into the next teaching.

"Class!"

"Stand up!"

"Good afternoon, students!"

"Good afternoon, teacher!" replied in a uniform manner throughout the lecture hall.

"Please be seated!" Tao Li said with a smile after glancing at everyone.

All the students in Class 18 sat down at the same time without anyone directing them, and during this period, there was no other noise except for the sound of their bodies touching the tables and chairs, just like a group of well-trained regular troops!

But it was this regular army in front of us that was a bunch of unorganized and undisciplined ragtag army a few months ago!

Mo said that Chen Tianxiang and Chen Ke, who were familiar with Class 18, were surprised, even Tao Li, who was standing in front of the blackboard, was also taken aback by the performance of the students in Class 18, is this still the Class 18 he knows?

With such classroom discipline, even if you search the entire Jinling Middle School, I am afraid that you will not be able to find a second class!

Ma Xiaotian, who was sitting next to Chen Ke, nodded with the same satisfaction, not to mention the rest, even the first few minutes were enough to be satisfying.

Classes continue!

Tao Li retracted his thoughts and looked at the students in the audience again, "In the last class, we learned some knowledge about hyperbola in conic curves, and now I want to ask the students to help me sort out what are the properties of hyperbola." Which student can nominate himself?"

At this point, the "sound immersion" effect included in package D begins to show its power. Tao Li's voice didn't feel anything when he said it, but when he heard it in other people's ears, it was very different!

It's like fairy music, although there are only a few short words, but everyone here is like hearing a grand music gathering, the mellow flute, the elegance of Xiao, the joy of the guzheng, the gentleness of the violin, the enthusiasm of the saxophone, and the lightness of the piano......

The sound effect of 3D surround sound made the entourage of the Education Bureau, who were about to fall asleep, wake up immediately, and Ma Xiaotian looked at Tao Li in front of him with fascination, this little brother's voice is so good!

All the people were attracted by Tao Li's voice.

"Hyperbola has two focal points!" The first to raise his hand to answer was Zhang Xingchen, the representative of the class.

"The hyperbola has two asymptotic lines, and they do not intersect with the hyperbola!"

…………

Every time the students below say a nature, Tao Li will list it on the blackboard, and everyone who was attracted by Tao Li's voice just now was amazed that Tao Li's chalk writing is particularly beautiful!

When the pen is written, the pen goes dragon and snake, and the formed text is through the back of the paper, into the wood for three points!

This little brother is not only handsome, but also surprisingly good-looking! Sure enough, words are a person's façade! The ancients did not deceive me!

But the shock is yet to come!

Tao Li finished listing these properties of hyperbola, turned around again, and then opened the PPT courseware of this lesson, "In the first lesson of conic curves, I showed you an animation showing how conic curves are formed, and now let's take a look at how the parabola is obtained by intercepting the cone on a plane. ”

As he spoke, Tao Li directly opened the well-designed animation, and while playing, he was still doing the commentary, "We can see that when the plane is parallel to the bus of the cone and does not pass through the vertices......"

Immersive and sound immersive!

Obviously, the animation played is far ahead, but Ma Xiaotian feels that the cone is in front of his eyes, surrounding him, and every detail is really visible, even the "texture" when the cone is cut on the plane, he can feel it!

How the plane is parallel to the busbar, and what is the nature of the intercepted parabola, Ma Xiaotian, a Chinese teacher who doesn't know much about mathematics, can see it at a glance, just like opening the mind!

Coupled with Tao Li's voice commentary, Ma Xiaotian dares to guarantee that everyone here will never want to use their minds in other aspects, and only one idea is allowed here.

That's listening to the class!

Learn!