On the second day, Gu Qing was satisfied and took Di Renjie to the study, there were already many adults with children here, there were more than ten children, the number was a little small, but it was a class.

Gu Qing said to Di Renjie: "In the future, you will be the squad leader here, and you have to manage these children well." ”

"Yes!" Di Renjie held a large number of books and replied seriously.

Several adults wondered, "Do you really want money?" ”

"No money!" Gu Qing said with a smile.

Gu Qing is a county in the village, and he is also a celebrity of miracle doctors, he has been familiar with the village for a year or two, so he handed over the child to Gu Qing, and the children of all sizes sat down, and Di Renjie handed out a book for each person.

Facing these children, Gu Qing found that the youngest of them was only four or five years old, and the oldest was eleven or twelve years old, and the age span was a bit large.

Standing up, Gu Qing said to them, "Tell me, what is your goal in life." ”

Child A said loudly: "Marry a daughter-in-law!" ”

Child B: "Eat meat!" ”

Child C: "Big house! ”

……

Gu Qing raised his head and sighed, "What a simple child......

Waving his hand to signal them to be quiet, Gu Qing said again, "The knowledge I want to teach you is different from the knowledgeable outside, I will teach you physics, science, this world is very big and has many mysteries." ”

"What is physics!" A child said.

Gu Qing is a person that the children are very familiar with, and the guys who tell stories all day long to collect money are very close to the children.

"That's a good question." Gu Qing nodded, "Physics is a kind of curiosity, such as why water doesn't flow to high places, and where the wind blows from. ”

"Can you marry me a daughter-in-law?" Another child asked.

"If you learn physics, you might be able to marry a daughter-in-law." Gu Qing looked helpless.

The practice of physics is very important, Gu Qing took the children out of the study house to see the simple waterwheel by the river beach, this kind of waterwheel is very simple and requires manpower to promote, this kind of waterwheel is also called overturning, not like a cylinder car, as long as it can rotate in the water.

"Today we're going to make a waterwheel." Gu Qing said, "You know that what a kite needs to fly into the sky is the wind blowing, and it can fly into the sky by itself, and we want to make a waterwheel that can make a waterwheel that can rotate with the flow of water." ”

Di Renjie originally thought that the teacher would teach the children to read and write, but he didn't expect to directly take the children out to teach while doing, which is different from the teaching method of the general study house.

Knowing that Di Renjie was puzzled, Gu Qing said, "Words are important, but teaching by example is also very important, teaching by word and deed, teaching by word and deed, with words and deeds, you can't delay it." ”

"The student understood." Di Renjie nodded and beckoned the children to build a waterwheel together.

Gu Qing was commanding, and he was very happy! The adults who were farming on the side also looked over one after another, knowing that Gu Qing wanted to build a waterwheel that could not require manpower, and they also came over to help.

The wood was made into various shapes, and Gu Qing began to piece together some bearings and wheels according to his memory.

"Teacher, the water tube has been made, I don't know if the size is appropriate." Di Renjie brought two water cones and said.

"Very good." Gu Qing looked at the water cylinder, "Hang these on the hub." ”

"Good!" Di Renjie nodded and said.

Fang Xuanling was discussing with Li Er in the palace about how to deal with the Tuyuhun garrison, Wang Qin walked in small steps, "Your Majesty, Gu Qing has opened a study house. ”

"Study?" Li Er was puzzled, "Kong Yingda and I said that they wanted to ask Gu Qing and Guozijian to teach knowledge, but this guy has no reply, and now he has opened a study house by himself?" Doesn't this kid look down on my country? ”

"Does Kong Yingda know about this?" Li Er said again.

"I don't know yet." Wang Qin said, "Gu Qing opened the study house in his own village, but it was not publicized. ”

Fang Xuanling finished talking about things with Li Er, and left the palace early to take a carriage all the way to Pushan Village, and no one in the study had the heart to say strange words in front of the door, "Hide in the small building and become a unity, regardless of his spring, summer and autumn and winter, this kid is still indifferent." ”

Not far away, I saw Gu Qing and a large group of children talking and laughing by the river in the field.

Shaking his head in disappointment and sighing, Fang Xuanling said, "Let's go back." ”

The driver watched the huge wheels being pushed up, and was about to catch up with the car to look back and was stunned.

Seeing the coachman's situation, Fang Xuanling also looked back, and the huge wheel turned up, watering the field with water, and only used a small bracket to support the big wheel.

"Check it out." Fang Xuanling said and stepped forward.

Gu Qing said to the children, "The flow of water is powerful, the leaves will flow when floating on the water, and the same water flow can drive the wooden cylinder to drive the waterwheel to irrigate with water, saving manpower!" If irrigation is no longer needed, you can use this lever to lift the water wheel out of the water so that it will not move again. ”

At dusk, the children watched the water wheel turn, and their hearts were proud! This is the waterwheel they made with their own hands, a different kind of knowledge sprouts in the hearts of the children, Gu Qing is not disgusted with this unchanging teaching method in ancient times, but he is not so satisfied.

"That's all for today, I'll give you a task to draw every part of the waterwheel." Gu Qing said, "You can partner with a few people, or you can ask your father and mother at home to help." ”

"Whew!"

A large group of children agreed, and they dispersed.

"Gu Qing, what are you ......" Fang Xuanling looked at the huge waterwheel that could automatically rotate without manpower, and was stunned, "You made this?" ”

"I made it with my children." Gu Qing looked at the huge waterwheel and said, "Amazing." ”

"Don't you want to go to the Guozijian?" Fang Xuanling looked at the waterwheel over and over again, and the structure of the entire waterwheel could be understood at a glance and was complex, so simple that a carpenter could do it, so that the waterwheel could be made so simply.

"Students don't know anything about the Analects, the Book of Poetry, the Spring and Autumn Period." Gu Qing said, "The prince of the country is afraid that he will not be able to do it." ”

"If this method of making waterwheels spreads all over the Tang Dynasty, how many people will be less laborious." Fang Xuanling sighed.

Gu Qing explained, "Teacher, this kind of big waterwheel is also adapted to local conditions, our river here is wide, and the water flow is fast, so it can make the waterwheel drive, if it is other places, it may not have this effect." ”

Fang Xuanling observed every detail of the waterwheel and said, "Do you just teach children this?" ”

"There's a lot to teach." Gu Qing said, "It's not just those poems that you want to learn, the teacher should be a student." ”

"It's a pity that Kong Yingda has worked hard, he hopes that you can enter the national prison." Fang Xuanling said again. ”