Chapter 15 The Devil's Classroom for Physics Majors
There is no need for special instructions to listen carefully in the first-year graduate school classes, but there is no need for substitute teachers to be too strict.
The school bell rang.
Wang Hao immediately used the teaching coin, quickly entered the teaching mode, and filled the entire classroom with a sunny and clear tone, "The content of this section is the image of the solution to the differential equations."
"There is a very classic example of tourism competition between the capital and Donggang. Both places are busy advertising to attract tourists."
"We can list the following system of equations, {x′=?x+by; y′=cx?3y}."
“Where x′ represents Donggang, y′ represents the capital, x and y represent the deviant tourism advertising budgets of Shanghai and BJ respectively..."
"In this example, we can analyze it. In the first case, Donggang's budget is positive, while the capital is calm."
"There is one point here. We need to ignore Donggang's budget..."
"..."
When the course officially started, everyone listened carefully. They followed Wang Hao's explanation and fell into understanding and thinking. They went deeper and deeper, and slowly finally drew the image of the solution to the system of equations.
The whole process is smooth and clear.
When they came back to their senses, most of the students understood. Some students couldn't help but be surprised. They found that the young teacher on the podium had a very clear explanation and could accurately grasp every difficulty.
When encountering a difficult point, the other party will explain it twice more.
This makes it easier for them to keep up with the course and understand new knowledge content. During preview, some content that is not clear to them can be explained once and they will feel fully understood.
Many students couldn't help but admire, "This young Teacher Wang teaches better than Teacher Zheng!"
“The explanation is clear and easy to understand!”
"When I take Teacher Zheng's class, I always feel like I can't keep up. But when I listen to Teacher Wang's lecture, I seem to understand everything."
Students' feelings are, in fact, the difference in teaching efficiency.
There is not much difference in teaching efficiency at the undergraduate level, because knowledge at the undergraduate level is the foundation. Most subjects only require an understanding of the basics. Students can keep up with the progress as long as they prepare carefully and listen to the lectures carefully.
When reaching the graduate level, the course difficulty increases significantly, and some students cannot keep up or understand even if they study hard.
"Differential Equations" is such a course.
This course requires students to have strong imagination and abstract thinking skills, as well as very rich basic knowledge. The difficulty becomes higher as the courses progress, and it becomes more difficult to keep up with the progress.
When the difficulty increases, the difference in teaching efficiency will be obvious.
Wang Hao has ten years of middle school education experience. He clearly knows how to teach and how to teach students. He can explain the same content much better than ordinary lecturers. He also attaches great importance to the courses and will be familiar with them carefully.
The lesson plan will be carefully studied for every step of the explanation.
In addition, "The Gift of Teaching" can increase understanding efficiency by 20%.
This is also key.
Using data for comparison, Wang Hao's serious explanation for one hour is equivalent to Zheng Yaojun's explanation for one and a half hours, or even more.
In addition, Wang Hao's explanation method is also very rich and supported by a steady stream of inspiration. He can think of many vivid metaphors to assist teaching.
For example, when talking about a three-dimensional image problem.
Probably because some students thought about the 'cosmic star movement', Wang Hao immediately thought of the 'comet, star' movement rule, which was very similar to the three-dimensional image explained, so he took the 'comet, star' movement rule as an example
, let students imagine and understand at the same time.
With practical examples, understanding becomes much easier.
One class, two classes.
It will end soon.
Many students feel that time has gone faster, and it passes just by paying attention to the lectures, whereas usually they always have to take a break.
Wang Hao finished the course content, quickly assigned homework questions, looked at the time and there were five minutes left, and said, "The following is free time. get out of class will be over as soon as the bell rings. If you have any questions, you can come and ask."
"But it's only ten minutes. I have class at ten o'clock."
Several students came around to ask questions.
Wang Hao gave explanations to three students in a row, and their questions focused on a few difficult points. Later, he simply went through a difficult example question on the blackboard, and then turned around and waited for the students to digest it.
By this time, get out of class was over.
He noticed the girl coming across from the door and asked with a smile, "Classmate, do you also have any questions?"
Gu Youyou immediately covered her face with her hands, hugged the book and ran towards the door, "No, I'll ask you alone tonight!"
"Whoosh!"
A group of students turned their heads collectively.
Wang Hao didn't react for a while, but he kindly reminded him, "Classmate Li Youyou, slow down..."
Gu Youyou staggered in her steps.
She looked back sharply.
Amidst Li Qian's strange laughter of "he, he, he", she rushed out of the classroom with an indomitable momentum.
…
Nine forty.
Wang Hao arrived at the large classroom on the second floor on time. He found a chair and sat at the door. He took the student list and started taking notes.
Physics majors have heard the news.
Many students are filled with anxiety because the posts and reports posted on the campus website are said to be made by one of them.
Someone named Ding Zhiqiang.
Ding Zhiqiang arrived very early, earlier than most students. He posted a message on the campus website, asked himself and the people in the dormitory next to him to help him, and even reported Wang Hao to the Academic Affairs Office.
Then, how do you feel when you come to class again?
It would be fine if the report really had an effect. The most important thing is that Wang Hao had nothing to do and was sitting leisurely at the door of the classroom, looking at the list and watching the students come in one after another.
This is... revenge, right?
Ding Zhiqiang understood it this way, and so did other students. Those who knew the situation couldn't help but talk about him.
He pretended nothing happened.
"Please keep your voice down, don't say it's me~~ Dear friends, please keep it secret!"
"Otherwise, I will definitely die!" Ding Zhiqiang heard someone discussing and quickly warned pitifully.
Wang Hao didn't know that Ding Zhiqiang did it.
When Ding Zhiqiang came to the classroom, Wang Hao thought he was a good student and arrived at the classroom fifteen minutes early.
He knew it was done by physics students, but he only had one thought in his mind, "Bad students, how many floors does a bag of rice have to carry! (Feel the pain!)"
During class, Wang Hao spends most of his time not on the podium, but lecturing in front of the first row, in the aisle, or even at the back of the classroom.
While sleeping or playing with your phone, of course you have to write it down.
Failure to listen carefully was not allowed. He called on those students who "suspected of not paying attention" to answer questions.
Ding Zhiqiang was called out twice.
Wang Hao didn't mean to target him, it was just because Ding Zhiqiang was out of shape and he was always distracted because of his anxiety.
I was called out twice, and both times I didn’t know what was being said.
Of course, write it down!
In this class, the bad students majoring in physics experienced what is called a "devil classroom".