In the end, Kim So-hyun still couldn't come up with the right answer, and agreed to Kang Ji-chan's seemingly reasonable time arrangement in a daze, which completely refreshed Kang Ji-chan's recognition of stupid students.

"You've just gotten up?" Jiang Zhican was not in a hurry to go to class, looked up and down at Kim So-hyun, who was wearing bear pajamas, and asked with a frown.

"Oh, yes." Kim So-hyun grabbed his hair and suddenly reached out to cover his face, looking shy.

"Ah, really!" Jiang Zhican fell to the side with a disgusted face, "Now you know that you are shy?" I'm going to wash up and come back. ”

"Oh." Kim So-hyun nodded, and ran to the bathroom with a puff of smoke.

Jiang Zhican glanced at this girl with a headache, then retracted his gaze and opened his backpack, looking at the tutoring materials he had prepared inside, and felt distressed for a while-I don't know where I lost my study notes in junior high school, anyway, these high school math, history, geography and other notes must be useless, it's really in vain.

However, Jiang Zhichan thought about it, and suddenly doubted his junior high school notes, can Kim So-hyun adapt to it?

"Ah, my head hurts, my head hurts!"

Jiang Zhican collapsed on the sofa in frustration, shouting in frustration.

"Teacher Nimi, I have medicine for headaches in my room." Kim So-hyun came out from the side and said kindly.

"No, you don't." Jiang Zhican said discouragedly, got up from the sofa, "Tie up your hair, don't put it on, and, well, take me to your room, I want to see the textbooks issued by your school." ”

"Oh." Kim So-hyun nodded, tied up his hair, and asked, "Are you really okay, Teacher Nimi, if you are not feeling well, I can study on my own in today's class." ”

"Don't be clever."

"Oh." Kim So-hyun stuck out his tongue and brought Kang Ji-chan to his desk.

This is a one-piece desk, in the shape of a wave, about three meters long and nearly one meter wide, in addition to the first floor, there are several layers of mezzanine and cabinets. However, at this moment, except for a few scattered books thrown on the table, a dazzling array of trinkets, dolls, snacks, and miscellaneous comic magazine photos, etc., occupied almost all the space, and also occupied all of Jiang Zhican's sight.

"Teacher Nimi, I'll clean it up right away!" Kim Sodazzle said quickly, just picking up this and putting this down in a panicked manner, which made Jiang Zhichan really not hopeful.

"Forget it, don't clean it up." He sighed.

"Huh?" Kim So-hyun looked back at him.

"It's the glass table over there, and it's there for classes in the future." Jiang Zhican pointed to a round glass table by the window, "Do you have a signature pen?" Black or blue. ”

"I have pink ones!" Kim said happily, with an extra pink pen in his hand.

Jiang Zhican rolled his eyes and said angrily: "Do I use it or do you use it?" ”

"Oh." Kim So-hyun pouted, took out a blue signature pen from the drawer and handed it to Kang Ji-chan.

"Have you had dinner?" Jiang Zhican asked.

"No, no." Kim So-hyun touched his stomach and looked at Jiang Zhican with sparkling eyes.

"Then you go cook a bowl of ramen, come over after eating, I'll read your textbook first." Jiang Zhican crossed her body, looked at the textbooks on the bookcase, quickly pulled out a few books, walked to the glass table and sat down, looking down.

"Ashie!"

Kim So-hyun looked at the teacher who was not understanding at all, snorted in annoyance, and turned to walk towards the kitchen.

About half an hour later, Kim So-hyun returned to her room, and Kang Ji-chan beckoned to her, pointed out a post-class question in the second chapter of the math textbook, and told her to do it.

"Teacher Nimi, I've done this question before." Kim So-hyun said.

"I know, but the steps and answers you wrote above are all wrong." Jiang Zhican glanced up at her, "Is there any more problem?" ”

"No, I'll get a pen and paper."

Kim So-hyun said honestly, walked to the desk and picked up the pen, and then opened the drawer to rummage through the blank paper, and accidentally dropped a few papers. Kim So-hyun's face was panicked, and he hurriedly picked up the scroll on the ground and wanted to hide it, but unfortunately it was still late, and Jiang Zhican's voice had already come. She was helpless, lowered her head and walked slowly to Jiang Zhican's side and handed him the scroll.

"These... are on a 100-point scale?" Jiang Zhican asked hesitantly, a little reluctant to struggle.

"It's not a 120-point system." Jin Soxuan said timidly, raised his eyes and glanced at Jiang Zhican, this teacher's face, well, it seems to be calm?

"I've done that question first." Jiang Zhican said, turning his head to look out the window, and after a while, he lowered his head and began to flip through the papers that did not have more than sixty points in his hand.

The room became quiet, and there was no sound except for the rustle of Kang Ji-chan flipping through the papers and the subtle movement of Kim So-hyun biting the tip of his pen and staring at the topic in a daze. There was no wind outside the window, and the curtains hung obediently by the window. There were no people on the road either, only the street lamps that stood for a long time, emitting a quiet glow.

Kim So-hyun couldn't stand such quietness, and couldn't stand the rustling sound like the uneasiness at the bottom of the commotion in people's hearts, she mustered up the courage and handed the solution steps that she couldn't figure out to Jiang Zhichan, and whispered, "Teacher Nimi, I'm done." ”

Jiang Zhican took it and swept it for a moment and stood up. Kim So-hyun instinctively shrank his head and hid against the wall.

Jiang Zhican ignored her, walked to the desk and frowned for a moment, took a thick English dictionary and a few tomes, and returned to his seat.

Kim So-hyun breathed a sigh of relief, but heard Jiang Zhican's cold voice: "Get up, stand up." ”

Kim So-hyun, who didn't know why, stood up and looked at Kang Ji-chan in confusion.

"I don't embarrass you, let's start with the simplest, the addition and subtraction of rational numbers, you can tell me as much as you know."

Jiang Zhichan turned the signature pen in his hand and looked at Kim Sohyun with no expression on his face.

Kim So-hyun was a little frightened, hesitated for a while, and began to stammer: "Add the same sign, absolute, absolute value is the same... If you add the same sign, the absolute value is the same... If you add the same sign, it seems that it will get smaller... If you subtract the positive sign, it seems to be getting bigger, uh, it seems to be getting smaller..."

"It's not going to get smaller, it's going to get bigger. What will vary is the absolute value of the two, which will be greater than or equal to the value of the subtraction of the two. ”

Jiang Zhican corrected, pointing to the English dictionary on the table, "Take it, hold it and put it on top of your head." ”

"Oh, I'm going to do this..." Kim So-hyun stared at Kang Ji-chan with wide eyes, and finally drooped his head full of grievances, pitifully holding the heavy English dictionary to his head, like a Bangkok maid holding a tray, sad and sad by the abuse of his master.

"Go ahead and talk about a few cases of exponential power operations." Jiang Zhican said without hesitation, and the signature pen still rotated between his fingers, which was smooth and pleasing to the eye.

"Index..." Kim So-hyun bit his lip, his small eyebrows furrowed together, and he seemed to be trying to think, but unfortunately he couldn't do anything.

"The nth power of a is the exponent." Jiang Zhican reminded helplessly, stood up, and put another book on her head.

Kim So-hyun lowered his head, his face depressed and did not speak.

Jiang Zhican paced back and forth in the room with his hands in his pockets, as if he was thinking about something, as if he had forgotten about Kim So-hyun, who was still being punished.

"Teacher Nimi...

After five minutes, Kim So-hyun, who couldn't hold it anymore, whispered bitterly for mercy, his watery eyes making people feel pity.

"Come here." Kang said as he returned to the glass table with Kim So-hyun, picked up a blue pen, and began to write on the glass table.

"Listen to me carefully about the question just now, and ask if you don't understand anything." Kang Ji-chan wrote as he spoke, and began to give Kim So-hyun a lecture.

"First of all, to solve this kind of function problem, drawing coordinates has always been the clearest and clearest way, you don't want to use the analytical method for convenience, honestly draw the coordinates, draw the parabola, look at its direction and width, and then list the functional formula, substitute the known numbers in, and find the unknowns."

"Like this, when the graphics come out, the question will become intuitive, don't you say?" Kang Ji-chan looked up and asked, looking at Kim So-hyun. In order to make it easier for Kim So-hyun, who was sitting opposite, to see it, he took a lot of effort to draw the figure backwards.

"Well, but Teacher Nimi, why are you drawing two pictures?" Kim So-hyun looked down at the picture drawn by Kang Ji-chan and asked strangely.

Jiang Zhican was stunned when he heard this, then gritted his teeth, and tried to say calmly: "There are two cases of this variable being greater than zero and less than zero, draw two diagrams, and I draw two diagrams... ”

"Inside, I understand, but Teacher Nimi, why do I only find one of the known numbers you said, and there is still one missing?"

"You can ask for it, it's in the previous formula, you see here..." Kang Ji-chan began to explain the doubts to Kim So-hyun in detail.

About ten minutes later, Kim So-hyun suddenly let out an "oh", indicating that he really understood.

Jiang Zhican's face was a little pale, and he put down his pen and held his forehead without saying a word.

Kim So-hyun ran out and then ran back with two more cups of ice cream in his hand.

"Teacher Nimi, will you have dessert?" Kim asked with sparkling eyes.

Jiang Zhican smiled bitterly and lowered his head and lay on the table.

"Teacher Nimi!"

"Don't talk! I just wanted to take a break. ”