The whole world thinks I'm a scumbag

Lu Xingyin retracted his gaze, flipped through the notebook he brought up, borrowed a chemistry book from Cai Jing who was nearby, and flipped through it.

As soon as the students below saw that he had calmed down, they all sat up straight and looked at him expectantly.

Meng Congzhou hesitated and said: "This is not good, Lu Xingyin is still sick and he is not fully recovered. Everyone wants to use this time to attend lectures, but he also needs to study by himself."

"It doesn't matter." Lu Xingyin paused, "There are only two classes, after that...the grade group should have a solution."

Lu Xingyin glanced at the chemistry book. The closest new knowledge point they have now is organic chemistry. It's just that there are only a few sections at the beginning, and the latest progress has just reached various organic reactions that are simple in difficulty but require a lot of memory.

Lu Xingyin said: "Then let me... take everyone and follow my learning method, is that okay?"

The students below looked at each other in blank dismay, and some said yes hesitantly.Some people still felt that it was absurd and unrealistic, and shook their heads with a smile, their eyes full of distrust.

Gu Fangwei sat in another posture, with his legs raised, and looked down at a book in the belly of the table. He seemed to no longer pay attention to the movement in the classroom, and there was no sign of getting involved.

"Okay, okay!" Chen Yuanyuan was the first to cheer, and he first raised his hand to ask, "We have read all the textbooks and memorized them, but it is easy to confuse when doing the questions. I want to know the reaction catalysts and reactions. In the end, can I just memorize it, or do ordinary teachers explain it?"

In fact, this is also a problem encountered by most of the students in Class 27—they have read and memorized the contents of the textbook carefully, but they may not be able to do the questions after writing down some parts. There are no rules, and there is no teacher's explanation.So the students in Class 27 could only frantically borrow information books from each other, and from the information books of different versions and different writing styles, they pieced together the more clear and simple rules that should have been told to them by the teacher in those textbooks.

For Lu Xingyin, he has never worried about the organic content of high school, because the first thing he came into contact with was the more principled and systematic content that started with the hybrid track, which is equivalent to mastering higher-level reaction logic and principles .

However, the high school textbooks in the province of S have already canceled this part of the content, and the organic related content occupies 155 parts. All teachers will emphasize "I can't memorize it", sum up the topic routines, and ask the students to follow them.But not to mention the learning effect itself, once the exam papers of province S appear as difficult as the chemistry difficulty in Qingmo No. [-] Middle School's last monthly exam, or the joint exam of ten schools of W school in this province with novel and varied topics , The direct result is the collapse of students' chemistry scores across the board.

Deer Walking Yin is very clear about the shortcomings of this teaching method.He learned this from Gu Fangwei and Xie Tian's biology teaching at the same time - Gu Fangwei first taught him not to use stereotyped thinking to learn, and to read words instead of memorizing words; Xie Tian taught him to understand the logic of knowledge and get twice the result with half the effort Effect.

In the educational environment of Dongtong City, where only rote memorization is left, he explored his own way-the method of smashing and reorganizing knowledge anytime and anywhere, and quickly exploiting loopholes. He also learned to build an extremely detailed knowledge framework. Add understanding itself, and it all falls into place.

Lu Xingyin said softly: "I have attended Teacher Chen Chong's class, and I will repeat Teacher Chen's point of view."

In fact, Chen Chong didn't talk so much in class, what he thought of at this moment was the second-hand competition book.

"The most important thing in the subject of chemistry is the establishment of chemical intuition." The picture of the title page of the competition book emerged in Lu Xingyin's mind, and then he flipped through today's latest unit, which contained countless different simple organic reactions.

He read: "The reaction of toluene and liquid bromine, the reaction of stupid and liquid bromine, the reaction of phenol and bromine water, the dehydration reaction of ethanol to ethylene, the dehydration reaction of ethanol to ether..."

As soon as he finished reading, some students started knocking on his head: "Please, stop talking, my brain is going to explode! I have memorized a morning self-study and often memorized..."

"Yeah, it's so hard to memorize. I went to inquire about it today, and the chemistry teacher in the next class even gave me the formula for summarizing the rules. We don't have anything."

"Actually, there are some things that don't need to be deliberately remembered." Lu Xingyin said.

He picked up the chalk and turned to write on the blackboard.The handwriting is still very light, it is his habit of writing, and it looks even lighter after being ill.

But no one complained. The students in the back row who couldn't see clearly ran to the front and squatted down to listen. The students by the window drew the curtains to prevent the reflection of the blackboard.

Lu Xingyin wrote two chemical formulas:

If the temperature is around 140°C:

CH3CH2OHHO-CH2CH3→CH3CH2OCH2CH3H2O（催化剂为浓硫酸）

If the temperature is around 170°C:

CH2HCH2OH→CH2=CH2↑H2O（催化剂为浓硫酸）

Afterwards, Lu Xingyin wrote down the structural formulas of ether and ethylene respectively, clearly marking each chemical bond.

"Maybe everyone thinks that one temperature is 140°C and the other is 170°C. The reaction conditions and products are very similar. Is there no other way than repeating memorization?"

Lu Xingyin didn't realize that he had learned this persuasive and inquiring way of telling from Xie Tian.

The chalk on the fingertips circles the characters at both ends of the chemical bond, draws an arrow, and then disassembles it. The chalk tip hits the blackboard, making a regular sound.

Like two different jigsaw puzzles, he dismantled them one by one and showed them to the class.

He went on to speak earnestly: "You can look at the structural formulas of ether and ethylene. Ethanol becomes ether, two molecules dehydrate one water, and ethylene dehydrates one molecule. The difference is an intermolecular dehydration. , an intramolecular dehydration. From this structure, we know that this is the difference between intermolecular dehydration and intramolecular dehydration. It appears that the reaction to form ethylene dehydrates more completely—that is, requires more intense reaction conditions."

"The reactants and catalysts are the same, and the reaction conditions at 170°C are significantly stronger than those at 140°C, so the reaction temperature for forming ethylene is higher. This is something that doesn't need to be memorized."

The whole class fell silent.

The students in the front row leaned forward and listened intently.Chen Yuanyuan said "fuck me" from behind: "So that's the case! I understand!"

"Then all the organic reactions in this unit today can be seen with similar logic, such as the bromination reaction of toluene and phenol." Lu Xingyin said, "Everyone knows that phenol is more active than toluene, and then ... Also because there are too many nouns in the organic part, Rong Yi's memory is confused. So we can think about it, why is phenol more active than toluene?"

He wrote out the chemical structures of the two, "Look at the functional groups."

Cai Jing said: "Phenol is a benzene ring connected to a hydroxyl group, and toluene is a benzene ring connected to a methyl group. Compare the properties of water and methane. Water is obviously more reactive than methane, so phenol is more reactive than toluene."

(Reference content for learning logic in this part-Sun Yafei, a blogger of popular science in chemistry)

"It's so complicated. Why do you think about it so much..." Someone began to mutter under his breath. "It's fine if I don't recite it."

"Then don't listen, you memorize it." A girl said angrily, "It's hard for me to remember more than 20 chemical reaction equations that look exactly the same. I wrote it down this time, and I might remember it wrong next time."

"That's right!" There was a echoing voice, and the people below listened carefully, and they didn't even know how to copy notes——what Lu Xingyin said was indeed the simplest and most simple logic!

They gradually discovered that the style of Lu Xingyin is Xie Tian's style. He completely reproduced Xie Tian's comprehensible and framed things, making many fragmented and messy things orderly and full of logic. It directly saves a lot of content that needs to be memorized repeatedly, and also directly avoids the confusion of memory.

The students in class 27 listened carefully. They had never felt that the subject of chemistry was so clear and simple. For the question, the organic multiple-choice questions with five points left are all up to Mongolian.