Yan Yuru originally just wanted to get close to Zhao Yan through elementary school, as for the mathematics that uses symbols to replace numbers and operations, although it seems novel to her, she doesn't pay much attention to it, but when she hears Zhao Yan's explanation of astronomy and geography in class, although she is not sure whether what Zhao Yan said is true or false, it makes her have a sense of eye-opening, and these knowledge Zhao Yan talks are reasonable, and it seems that people can't find a place to refute it at all.

"Teacher, just now you said that we live on a sphere, and there is a big 6 named America on the other side of the sea, which is on the other side, and now we are facing up, so they should be facing down, why don't they fall from the earth?" At this time, Zhao Hao suddenly stood up and asked a question, which was also the biggest problem encountered in ancient times when explaining that the earth was spherical.

"Hehe, today I am mainly talking to you about some astronomical and geographical knowledge, as for the question you asked, it involves another discipline, which is a natural science that studies the structure of matter, the interaction of matter and the laws of motion, I call it physics!" When Zhao Yan said this, he turned around and wrote the two big words "physics" on the blackboard.

Next, I saw Zhao Yan turn around, and then glanced at the entire classroom before he spoke: "Physics is a very large and complex subject, almost everything in the world is included, as for why the person you said just now did not fall from the earth, in fact, this involves a law in nature, called gravitation. ”

Zhao Yan said and turned around again and wrote the four big words "gravitation" on the blackboard, and began to explain the gravitational force simply, as well as the planets of the solar system and the reason why the moon revolves around the earth. also explained it with gravity, which made Yan Yuru and others also have a feeling of cheerfulness, with this gravitational force, many things that they couldn't figure out before can be explained.

"Okay, that's all for today. After all, the subject of physics is very precise and complex, and today I can only give you a general explanation of what gravity is, as for some constants and calculations related to this aspect, I will explain it in detail when you learn the subject of physics in the future. Zhao Yan finally concluded that gravity is one of the greatest manifestations of natural science, and it has extremely important significance. Naturally, it can't be explained in a sentence or two, and it's already time for school to get out of school.

Seeing Zhao Yan packing up his things, Princess Bao'an, Yan Yuru and others in the classroom came to their senses, and immediately turned their heads to look at the sky outside, and now they unknowingly reached noon. This made everyone feel that time passed too quickly, even Yan Yuru with other purposes also had this feeling, it was the first time she had such a strong desire for unknown knowledge.

Zhao Yan has never liked to delay the end of school, announced the end of school at the moment, and then called Princess Bao'an and others, who were still a little stunned, to leave the classroom together, but on the way, Princess Bao'an and Princess Shoukang and others kept asking Zhao Yan, wanting to learn more about astronomy, geography and physics from him. It's a pity that Zhao Yan has been talking all morning, and his mouth is really dry at this time, so he can only tell them to wait patiently. When these aspects are talked about in the future, they will definitely be informed to listen.

However, at lunchtime, Princess Shoukang told Cao Ying and them about the lessons they heard today, and Cao Ying and the others were also stunned, and they were the same as Princess Bao'an before, they all thought that the primary school opened by Zhao Yan was just to beat the time. I didn't expect the professor's things to be so amazing, if these things were true. Whether these things are true or not, as long as they get out. It will definitely lead to a big debate among the readers of the entire Great Song Dynasty, and even change some of the previous cognitions.

"Husband, are these things that you have always taught to students in school?" Listening to Princess Shoukang's words, Cao Ying finally quietly asked Zhao Yan, she was now worried that Zhao Yan would bring trouble to the palace if he taught this?

"Now those students are in elementary school, and they mainly learn literacy, hyphenation and arithmetic, with the occasional astronomy, geography and physics, but when they have a solid foundation, they can start to study these more advanced courses." Zhao Yan replied with a smile.

"But if these things are spread out, will they cause trouble for the husband and the palace?" Cao Ying asked directly with some worry at this time, she always felt that these shocking remarks would be a little unsafe, even if Zhao Yan was a prince, he might face pressure from other aspects.

"Haha, I know what you're worried about, lady, but I'm a dignified prince, just teaching a few students, and not teaching students to steal and rob, who will take me?" Zhao Yan smiled nonchalantly.

"But ......"

Cao Ying was still a little worried when she heard this, and just wanted to persuade a few more words, but she saw Zhao Yan smile again: "If it really doesn't work, I'll tell my father honestly, these are all things I learned in my dream, although I can't improve the national strength of our Great Song Dynasty all at once, but as long as there are more people who learn, it will slowly change the situation of our Great Song Dynasty, with the wisdom of my father, I will definitely support me then, as long as I have his support, then what is there to worry about?" ”

"This ...... That's just as well. Cao Ying couldn't help but nod when she heard this, although she didn't believe Zhao Yan's explanation of meeting immortals in a dream for a long time, but Zhao Shu was convinced of it, especially after Zhao Yan brought real changes to the Great Song Dynasty, Zhao Shu also valued Zhao Yan more, if he had his support, even if he caused trouble in the future, he didn't have to worry.

"By the way, I almost forgot something!" Zhao Yan suddenly patted his head at this time, and then leaned over to Cao Ying again and said, "Lady, I see that you and Mi Xue are really working too hard to calculate accounts every day, it just so happens that the mathematics I teach can greatly simplify your accounting and process, and there is also a thing called a table, which is a sharp tool for accounting purposes, do you want to learn it?" ”

"Of course you have to learn, the knowledge in your husband's stomach can't always be cheap outsiders, as long as it can be used at home, your husband will teach me everything!" Cao Ying immediately said with a look like a housekeeper when she heard this, in her opinion, Zhao Yan's knowledge is also part of the family's wealth, and it is naturally best not to outflow.

Seeing that Cao Ying was interested, Zhao Yan was also very happy, and waited until lunch, while there was still some time before going to school, Zhao Yan called Cao Ying and Mi Xue over, and then explained to them ten Arabic numerals and some commonly used operation symbols, and when they mastered the use of numbers and symbols to calculate, he drew the table, indicating the expenditure, income and date, etc., so that the daily and monthly income and expenditure are clear at a glance, and it is no longer the difficult to remember flow account before.

"Why didn't we think of such a simple solution before?" Cao Ying said with some annoyance after seeing the form, the Wangfu family has a big business, just the daily income and expenditure accounts can annoy people to death, and her daily work is almost all about dealing with the account books, but if you use Zhao Yan's form, the income and expenditure are clear at a glance, and it doesn't take too much time to check the accounts.

"Hehe, it's not too late now, it will be much easier for you and Mi Xue in the future, but although the numbers are good, they are also easy to be altered, so you'd better write Chinese characters behind your daily accounts, so that you have an extra layer of insurance!" Seeing Cao Ying's appearance, Zhao Yan couldn't help but say with a little weakness, he should have thought of this method a long time ago, but because he never cared much about the affairs of the family, Cao Ying didn't let him take care of the affairs of the family, thinking that he had a share, but Zhao Yan never thought about it.

Cao Ying and Mi Xue both understood the principle of the table, but they were not very proficient in mathematical operations, so Zhao Yan wanted her to listen to the class, but Cao Ying was a strong character, and she was reluctant to go, so in the end, she could only let Mi Xue follow Zhao Yan to school to study, and then come back to teach Cao Ying.

It's just that what Zhao Yan didn't expect was that when he went to class in the afternoon, in addition to looking for snow in the team, Xue Ning'er and Ouyang Wanling were also moved by Princess Shoukang, so they had to go together, and Yelusi, who was pregnant, also wanted to go, but her body was really inconvenient, so she could only stay with Cao Ying.

"Husband, listen to the third sister, Yan Yuru also went to your class?" On the way to school, Xue Ning'er suddenly came to Zhao Yan's side and asked in a low voice, with an expression on her face that seemed to be smiling but not smiling.

When Zhao Yan heard Xue Ning'er mention Yan Yuru, a flash of inspiration immediately flashed in his mind, and he couldn't help but say at the moment: "Ning'er, you didn't hear that Yan Yuru was coming, so you wanted to come, right?" ”

"Hmph, she is a woman who is not related to her husband and can listen to her husband, why can't I come, in addition, I have to help Sister Ying'er and them look at you, don't let Yan Yuru that woman hook her husband away!" At the mention of Yan Yuru, Xue Ning'er really said angrily, it seems that she is really coming for Yan Yuru.

"I really can't help you, but she's just curious, so she came to the class, maybe after the curiosity passes, she won't come again." Zhao Yan also said helplessly.

"I have known Yan Yuru for so long, and I have never heard of her special interest in arithmetic, I think she took the initiative to listen to her husband's class, I am afraid she has other intentions!" Xue Ning'er was angry, but even she didn't expect that Yan Yuru did have other purposes for coming to class.

Zhao Yan didn't care about Xue Ning'er's words, in his opinion, Xue Ning'er and Yan Yuru were natural rivals, at least for Xue Ning'er, so it was normal for her to say bad things about Yan Yuru, now he only hoped that Yan Yuru would not come again this afternoon, but unfortunately the truth was destined to disappoint him, when they came to the classroom, they saw Yan Yuru in a white dress already sitting there, seeing this familiar figure, Zhao Yan immediately felt that Xue Ning'er behind him became high-spirited. (To be continued)

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