Just turned over a new leaf and became a wise and intelligent student

Chapter 6 You also need to give guidance on this

When he saw this boy, Duan Yongming couldn't help but think of the good show that happened at the school gate in the morning.

Why didn’t I realize before that this guy is so capable of doing things?
Duan Yongming is not the kind of teacher who only cares about grades. He also pays attention to students who are not good at math in the class.

People like Xu Qingshan, who always scored 80 or 90 points in the exams and kept teetering on the edge of passing and failing, were the focus of Duan Yongming's attention.

If Xu Qingshan was stupid, Duan Yongming wouldn't say anything.

But the problem is, this little bastard's problem-solving ideas and logic are actually not bad. Judging from Duan Yongming's 20 years of teaching experience, he is also a smart boy but he doesn't study hard.

Sometimes, if the teacher gives more help, the student's grades can make a big breakthrough.

According to Duan Yongming's expectation, if Xu Qingshan studied hard during his senior year review, he would at least get 500 points and would have no problem getting into a good university.

Duan Yongming always thought that as long as he put more effort, he could help as many students as possible. In this way, after each evaluation after the college entrance examination, the rate of admission to key universities for the A-level students he led could be improved by a few decimal points, which might even trigger the school's bonus line and slightly change a child's fate.

As a teacher, isn't this what you're looking for?
Old Duan walked down the podium holding his double-layer glass teacup in one hand and resting his other hand on the half-open lid, and began to walk around the classroom, standing next to this student and then stopping next to that student.

This behavior is very oppressive for students.

Old Duan stood next to Guo Wei and watched for a while. Guo Wei didn't even dare to put down his pen, for fear that he would make a mistake on the spot and be seen by Old Duan, and then be pulled out as an example.

"When doing the exercises, you need to write. A good memory is not as good as a bad pen. Mental arithmetic is the easiest to make mistakes. Don't take it for granted."

He left Guo Wei, strolled around, and unknowingly walked to Xu Qingshan's side.

Three multiple-choice questions, two fill-in-the-blank questions, and two essay questions.

The scope of the investigation is actually quite broad.

The first question is the most classic set and common logic problem:

1. Given set A = {x|x-2≤0}, set B = {0, 1, 2, 3}, set C = {x|-1＜x＜1}, then (A∩B)∪C=（?）

A.(-1]
B.(-1, 1]∪{2}
C.(-1]
D.{0}
Old Duan stood behind Xu Qingshan holding a teacup and watched him answer the questions.

For question 1, choose B.

Well, check if the draft contains the correct thought process and reasoning process.

In fact, the question itself is not very difficult, and for this type of multiple-choice question, most people will choose to directly select the answer after deducing it in their minds.

However, Lao Duan set rules for students in the experimental class.

He doesn't care about what happens during the formal exam, but during the regular quizzes, he requires everyone to write out the derivation process neatly on the draft.

This is actually quite good. After all, the purpose of the quiz is to understand students’ understanding and application of knowledge points.

If someone relies on guessing the answer, then the role and significance of the quiz will be infinitely weakened.

It has to be said that as a gold medal teacher, Lao Duan is very good at teaching and educating.

only.
Old Duan stood behind Xu Qingshan.

He found that the boy was not panicked at all, and even looked up at him, smiled and nodded to him.

He doesn't look like a student at all.

"Ok?"

When Old Duan saw the draft paper beside Xu Qingshan's hand, his old face was extremely interesting for a moment.

It’s not that Xu Qingshan didn’t write anything.

But Xu Qingshan wrote everything.

On his draft paper, he neatly wrote down the complete knowledge points about sets and logic, from the concept of sets, to the characteristics of elements, to the distinction between subsets, proper subsets, and the relationship between them, to the distinction between intersections, unions, and complement operations, etc. He almost directly listed all the parts of the knowledge points that needed to be used in this area.

And based on the way he listed the knowledge points and formulas, Lao Duan had an idea in his mind that was absurd to guess.

This kid.
It did not seem that he had memorized these knowledge points. Judging from the way he wrote them, it was more like he only remembered a few of them, but relied on his logical ability to accurately deduce the rest.

However, the set questions themselves are not difficult, and the knowledge points of sets are also the easiest part of high school mathematics.

Lao Duan felt that he could still accept it.

But now he found it a little hard to accept what Xu Qingshan was writing.

After all, this is only the first day of rebirth.

Although Xu Qingshan still remembered some high school mathematics knowledge, there were still many gaps.

For him, memory is not a scattered puzzle where he has to find the missing piece in his memory to fill it in. Instead, he needs to use the part of the puzzle he has already mastered to draw the missing piece himself.

Old Duan just stood beside Xu Qingshan.

Did you see him trying to derive the formula through geometric drawings and simple deductions?

It seems that Xu Qingshan only remembers the most basic part of the derivative, such as its definition: y'(x)=dy/dx=lim h→0 y(x+h)- y(x)/h.

But Old Duan watched Xu Qingshan derive the addition rule, multiplication rule and chain rule from the definitions. He could understand these, after all, other students with a solid mathematical foundation could also do it easily and clearly.

But how come he also gave on-the-spot guidance when doing the quiz for e’s hypothesis verification?
The chain rule was used to simplify the definition of the derivative, find the common denominator, and derive the division rule.

For a moment, Old Duan didn't know how to evaluate this student who seemed a little abstract.

He seems to have a sense of beauty that combines a weak foundation with strong logical thinking.

Ok.

It fits Lao Duan's stereotype of Xu Qingshan.

His current assessment of Xu Qingshan's intelligence level has been slightly raised from the original score that could be raised to over 500 points if he studied hard. If he really studied hard in his senior year, 550+ would definitely not be a problem.

With this score, you can get into some good 211 universities.

For example, Rongcheng University in the provincial capital Rongcheng.

It’s just that the foundation is too weak, and the first two years of high school were like a joke.

Old Duan complained in his heart.

I did fill in all the previous choices, but I didn't touch the fill-in-the-blank questions that tested the counting principle and the binomial theorem. I didn't even write a draft. It was obvious that I had given up directly.

For the more difficult fill-in-the-blank question about vectors, he scribbled one or two lines of definition on the draft and then crossed it out. It seemed that he realized that his memory was wrong.

There are two big questions, one about derivatives and one about geometry.

He did it quite well.

In 20 minutes, Xu Qingshan finished the questions, rubbed his wrists, and let out a long sigh.

This topic is not bad, and there is nothing wrong with guiding it now.

The main reason was that I hadn’t held a pen and written for a long time, and I had to deliberately write according to the neat handwriting in my memory, which became the most difficult part of this test.

Xu Qingshan looked up and saw Old Duan, holding a glass, walking leisurely towards the podium and asking people to collect the papers.

I couldn't sleep last night because of the pain. Then I took a nap for three hours in the afternoon. I felt a little dizzy. If there is any problem in the description of the article, please correct it~
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(End of this chapter)