That afternoon, after Lu You came back, Yan Yan specially discussed with him the education of several children, and then Lu You went to see the private school gentleman and quit the gentleman.

From the next day, Yan Yan took over the responsibility of educating the children, she made a schedule for the children according to the experience of the previous life, and then marked the courses that need to be learned every day.

The children were still young, and Yan Yan didn't want to hold them too close, as for Lu Chu and Lu Yuan, Yan Yan decided to wait until they were eight years old and send them directly to the academy.

To Yan Yan's surprise, the children liked her teaching method, and it was no surprise that the three children's favorite subject was "Natural Science", because from this lesson, they could understand the natural world more clearly and intuitively, for example, Yan Yan taught them how to distinguish between mammals and oviparous animals, and what is the difference between them; Also, what are vertebrates and invertebrates, as well as amphibians and terrestrial animals, etc., in addition to knowing animals, Yan Yan will also teach them to know all kinds of flowers and trees.

Occasionally, Yan Yan will take them to do a few simple experiments, such as observing the color of light through soap bubbles, such as imaging small holes, such as drilling wood for fire, such as using existing substances in the home to distinguish acid and alkali salts, and what can be ingested and which is not allowed, and which is absolutely harmful.

One of the most complicated experiments that Yan Yan took the children did was to use charcoal to burn to collect carbon dioxide, through a section of pig's small intestine filled with water, and finally drain the water, leaving a bulging section of gas, so that the children could understand that gas would also occupy space, and then pass the carbon dioxide into the clear lime water, and finally dig out the calcium carbonate mud for the children to show after the lime water settles.

Through this experiment, Yan Yan also taught the children what gas poisoning is, how to deal with gas poisoning, etc., and even took the children to simulate how people should escape in the event of a fire.

Not to mention, Yan Yan feels very fulfilled in such a busy day, and the children also feel very happy, the most important thing is that the memory of this happy growth should accompany them for a lifetime and warm them for a lifetime.

On the sixth day of the eighth month, the crown princess gave birth to another princess, and Yan Yan was inconvenient to visit, so he sent Lu Jin and Lu Chu over together, but when the two children came back, they actually brought Li Xi and Li Ran in.

It turned out that Li Xi and Li Ran learned from Lu Jin and Lu Chu that Yan Yan had set up a small class at home, saying that the things they learned were fun and interesting, which was very different from what the master said. So, the two children were also curious, so they had to come to listen to two classes, and they also pointed out that they wanted to learn natural science, and they also chased Yan Yan and asked what natural science was.

Yan Yan had to explain it roughly, and then took them to make a simple compass, and then took them to simulate the story of Cao Chong's elephant, using a self-made wooden boat model and putting it into the water, and then putting a dagger on the wooden boat, carving the scale on the wooden boat that is not on the water, and then picking up the dagger, putting the same weight of salt, and observing whether the scale is consistent.

After doing this experiment, Yan Yan gave everyone a science popularization of the relationship between buoyancy and density, volume, and weight.

Later, Yan Yan saw that Li Xi was still a little unsatisfied, so he pondered for a while, chose an iron ball and put it on the wooden boat, the wooden boat sank, and after taking out the iron ball, Yan Yan put a wooden ball of the same size, and the wooden boat was still suspended on the water.

Finally, Yan Yan assigned a homework for everyone, how to measure the volume of an irregular iron block.

Li Xi had never heard of the word volume, and Yan Yan had to use the size of the object to describe it.

To Yan Yan's surprise, Lu Jin reacted the fastest, and not long after Yan Yan finished speaking, Li Xi hadn't said goodbye, so she thought of a way, saying that it was like Cao Chong, first put the irregular iron into a graduated cylinder filled with water, and finally the water overflowed more or less the volume of the iron.

"Yes, my mother has not worked hard in vain these days, Jin Niang's method is the simplest and most effective, and you will remember it in the future, you must know how to apply what you have learned, and you must know how to draw inferences from one another." Yan Yan gave her daughter a hug as encouragement.

"Mother, is it possible that those invisible gases can also be measured in this way?" Lu Chu raised his head and asked.

"Yes, we have learned to draw inferences from each other, which is so smart." Yan Yan let go of Lu Jin and gave his son a hug.

"Aunt Yan, can you teach us more of this knowledge?" Li Xi looked at Yan Yan with a wistful expression.

"That's it, come over when you take a break in the future, I can take you to get to know some common sense in nature, although these things are fun and interesting, but they are of little use to you, you have to understand that you are different from others." Yan Yan also reached out and touched his head.

For an emperor, how to manage a country is obviously much more important than mastering these natural knowledge, so Yan Yan was afraid of changing the temperament of the child, so he only promised the other party to come over when he was resting, she could teach him some mathematical knowledge, as well as some knowledge of economic management, although Yan Yan himself is also a rookie in this regard, but it is more than enough to teach a child.

Sending Li Xi and Li Ran away, Yan Yan looked at Lu Jin with a serious face, Lu Jin's mind turned, realized something, and hurriedly threw himself into Yan Yan's arms, "Mother, I didn't mean to tell them this, it was the queen mother who saw me and asked me why I didn't want to be Li Ran's sister again, I had to say that I took my younger brothers to study at home with my mother, and the queen mother was curious when she heard it, and asked us what we learn every day, I had to say, how do I know that Brother Li Xi has to follow me to take a look?" ”

"Really?" Yan Yan looked at Lu Chu.

"It's true, mother, the eldest sister didn't lie to you, it was Brother Li Xi who had to pester the eldest sister, and said that he wanted to assess the eldest sister's homework." Lu Chu told the truth.

"Mother, don't listen to Ah Chu's nonsense, Brother Li Xi hasn't seen us for a long time, ask my mother if she is in good health, and ask if her wound still hurts." Lu Jin glared at Lu Chu and threw himself into Yan Yan's arms again.

Yan Yan heard this and wanted to hold his forehead, how old a child is, he actually knows how to be shy and knows how to hide his heart.

That's not a good thing.

But then again, Li Xi has always behaved so strongly, it seems that he has long recognized Lu Jin, and it is difficult for Lu Jin not to be precocious.

Therefore, at present, it is not how to refuse Li Xi's refusal of the royal family, but to teach Lu Jin how to survive in the palace, which is a bit difficult for Yan Yan, because she herself dislikes intrigue the most.