Nie Qiu laughed out loud, "Okay, don't be poor, it's still raining, let's go home early after eating supper!" Be careful not to catch a cold. As he spoke, he packed a barbecue for them.

Nie Aifang grilled two more skewers of fish balls and chicken wings for each of them, and Nie Qiu didn't go out of her way to calculate how much the barbecue they ordered was worth, she knew that Nie Aifang would consider it.

Sure enough, after baking it for everyone, Nie Aifang only accepted a hundred yuan from these classmates. Vegetarian barbecue is available for five cents a skewer, and there are also a string for a dollar, but fish balls, chicken legs, and chicken wings are all two or three yuan, and there are even five yuan a string. If you really want to collect it, the barbecue in the hands of more than a dozen classmates is also worth two hundred yuan, but Nie Aifang only charges the cost price.

Watching Zhao Qidi and them leave with a smile, Nie Aifang smiled lovingly, "The leftover dishes now, we can stay and cook at home, and we don't have to worry about spoiling." ”

"Hmm." Nie Qiu bent down and stuffed the honeycomb coal stove, and then got on the tricycle, "Mom, let's go back too!" Now there are few people in the night market. ”

Nie Aifang covered everything on the tricycle with plastic film, and then put away the big umbrella. wiped the cushion of the tricycle with a rag casually, then got on the tricycle and drove Nie Qiu home.

Nie Qiu and Nie Aifang returned home, and after washing up, Nie Qiu went back to the room to rest. Although it was raining today, it was also the first day they came home, and it was not yet ten o'clock.

Sleeping on the bed, Nie Qiu took out the necklace, the luster of the jade is getting better and better, it may be that there is a living creature in the jade, but the chain has been broken, and it can't be worn around the neck. Nie Qiu sat up from the bed, took out two hundred yuan from his purse, and sighed.

Where would the current gold shop repair such an old-fashioned chain? Only those with old skills can repair such handmade chains. She didn't know a handicraft craftsman who knew how to do it, and she didn't want to tell Nie Aifang that the chain was broken.

The older generation of people have superstitious thoughts, since Nie Aifang thinks that this necklace can keep her safe, she will also think that something will happen if this chain is broken, right?

Nie Qiu clenched the chain in his hand, closed his eyes, silently thought about the appearance of the necklace, opened his eyes, and sure enough, he was standing in space.

The fluffy little white rabbit jumped in front of Nie Qiu and said happily: "Nie Qiu Nie Qiu, look at you, I'm back in my body." ”

Nie Qiu squatted down and picked up the little white rabbit on the ground, "Are you a Jiang?" ”

"Uh-huh." She nestled in Nie Qiu's arms and stretched out comfortably, "Thank you, Nie Qiu." ”

Nie Qiu shook his head, looked at the spitting rabbit in his arms, and laughed, "I didn't do anything either, Hu, congratulations." Are you feeling better? ”

"Speaking of which......" The little white rabbit jumped out of Nie Qiu's arms and looked up at Nie Qiu, "Nie Qiu, what about the dishes in the space?" ”

Nie Qiu looked at the vegetables that had gone through a few more spring and autumn seasons, the rotten leaves moistened the newly grown vegetables, and frowned, "I don't know what to do yet, I ...... I didn't know how to tell my mom how to say it so that she wouldn't be suspicious. ”

"Nie Qiu." The little white rabbit looked at Nie Qiu and said softly, "I think, you can go to the vegetable market first to see if there is any way." ”

Nie Qiu squatted down and rubbed the little white rabbit's head, "I know, then I'll go out to sleep first, Hu, good night." ”

Maybe she was right, she should go to the vegetable market to have a look, and perhaps, she could find a way to buy and sell.

When she went to school the next day, Nie Qiu found that everyone in the class looked at her differently. She smiled slightly, she walked to her place, put her bag in the drawer, and took the rented book out to read.

"Nie, Nie...... Autumn, do you know how to do this question? A girl walked towards Nie Qiu with a roll, put it on the desk, and looked at Nie Qiu with a worried face.

Nie Qiu smiled, put down the book in his hand, picked up the scroll and looked at it, this question is a basic quadratic function problem, the question is very simple, the question is: What is the abscissa of the intersection of the image and the X axis of the quadratic function y=X?+X-2?

Nie Qiu thought for a moment and said with a smile: "We need to draw a parabola for this question......

"What is a parabola?" Before Nie Qiu could finish his words, he was interrupted by the girl.

"You don't know what a parabola is?" Nie Qiu's eyes widened in surprise, and he saw that the girl shook her head, "Do you know what the independent variable X and the dependent variable Y are?" ”

The girl still shook her head, and Nie Qiu took a deep breath, "Do you know what the expression of quadratic functions, general, vertex and intersection is?" ”

The girl still shook her head blankly, Nie Qiu couldn't help but hold her forehead, she didn't want to be too surprised and dampen the enthusiasm of her classmates, but quadratic functions are the most commonly learned knowledge in third-grade mathematics, if you don't even have a little understanding, you can only start from the basics.

In other words, if the teacher does not teach everyone from the beginning, it will be difficult for students to understand what the teacher is teaching.

Nie Qiu remembered that every time they did not have a teacher to come to class for their morning self-study, it was basically self-study, it was self-study, it was better to say that it was free activities, she looked at the more than 20 students in the class who came early and took out their new or full of graffiti textbooks, and the students who were reading seriously, stood up, and walked onto the podium.

The girl standing in front of Nie Qiu's desk was stunned, knowing what Nie Qiu was going to say, she quickly sat down in Nie Qiu's place, took out the math book in Nie Qiu's schoolbag, and looked at Nie Qiu standing on the podium seriously.

"Students! Good morning. Nie Qiu smiled and took out a math book from the podium, and then picked up the chalk on the podium, "Just now a classmate asked me a question, I wrote it on the blackboard, let's help her solve it, is it okay?" ”

The classmates in the class looked at each other for a while, then nodded towards Nie Qiu. Nie Qiu turned around and wrote the question on the blackboard, and after the students who came early saw it, they began to talk to each other.

Finally, a boy stood up and asked, "Nie, Nie...... Autumn, what is a quadratic function? ”

In just one sentence, looking at the curious eyes of the other students, Nie Qiu knew that almost none of the students in this class listened to the class, and even if they heard what the teacher said, they only went in and out of the left ear, and they didn't remember it at all.

Seeing Nie Qiu staring at him, the boy blushed a little, and he scratched the back of his head embarrassedly, "I only think that this thing is a quadratic function...... It's a little familiar, as if I've heard it somewhere, but ...... I really don't know what it is. ”

Nie Qiu looked at the boy, although she admired this person's frankness, but if this sentence was heard by the math teacher, she might be so angry that she vomited blood, right?

Nie Qiu opened the math book and said with a smile: "Please turn the fifth page of our math book, from today onwards, I will review the math textbook with you, is it okay?" For the sake of the self-esteem of these students, she still didn't say the word 'teach', but just said to review with everyone.

"Good!" As soon as Nie Qiu finished speaking, the classmates in the classroom all answered happily and loudly. Follow Nie Qiu as he flips through the math book.

The other boy stood up embarrassedly, "Nie Qiu, I'm ...... My math book doesn't have a fifth page. ”

Nie Qiu looked at the math book on the boy's desk, the entire textbook had been torn off more than half, making Nie Qiu somewhat speechless, she originally wanted to ask him to use the same book with his tablemate, but found that his tablemate had not yet come, so she had to say: "Now there are still many classmates in the class who have not come, you see where there is only one person like you, and there are also books, squeeze with him!" As he spoke, Nie Qiu looked at the other students, "If you don't have a math book, you can also share a table with other students." ”

After some commotion, the classroom finally quieted down, and Nie Qiu said with a smile: "Now, what I want to talk about is the foundation of the foundation, what is the function ............"

Nie Qiu took the math book, stood on the podium, and explained to the students one by one functions, one-dimensional one-dimensional functions, and one-dimensional quadratic functions.

The students in the class came to the school one after another, and when they entered the classroom, they also subconsciously lowered their voices, lightened their footsteps, and took out their math books after sitting back in their seats, listening to the insects and birds in the early morning, and listening to the diligent teachings on the podium.