Xiaoxianrou live-streamed to support teaching, and the whole network cried and begged me to take the

: Give students colorful science lessons

Since I have the ability to teach scientific experiments.

Li Siyuan has always planned to add an additional class to all students.

It’s science class.

To be honest, the current cultural courses for students only include Chinese and mathematics, which is actually a bit monotonous.

Although sometimes Li Siyuan would also talk to them about ideological politics, some simple economic knowledge, such as the origin of currency, and human geography.

Use some of the knowledge points he accumulated from reading books in his previous life to enrich the children’s knowledge and knowledge.

But he still felt it was not enough.

Therefore, this scientific experiment teaching ability has given him a good boost.

Allowing children to understand the world and the magical nature through science will not only make them more awe-inspiring for the world, but will also help them face science and comprehensive science courses in junior high and high schools.

At Li Siyuan’s suggestion, this time they bought some suitable experimental equipment through the help of the program team.

During this weekend, they are going to organize their experimental equipment and find time to do experiments with all their classmates.

“Siyuan, do you really know how to use these things?”

Ge Yu looked at each glass instrument, alcohol lamp and so on, and asked with some confusion.

To be honest, even though they had done a lot of experiments when they were young.

But they have forgotten all about it now.

Not to mention teaching it to children.

“Don’t worry, I can use it.” Li Siyuan said with a smile.

“You should also follow me and learn more. Maybe your children can use it in the future.”

Ge Yu nodded like a chicken pecking at rice.

Now he is particularly interested in learning this kind of thing.

It’s like becoming a big brother to the children in the mountains, leading them to learn together.

On Monday afternoon, Li Siyuan took the main course.

In the surprised eyes of the students.

In the next class, Li Siyuan actually came to class with a few cabbages.

The classmates didn’t understand.

The last time Li Siyuan came to class without a textbook, it was to celebrate their birthday.

Why are you getting cabbage today? Are you trying to teach them how to grow vegetables?

“Students, today’s class is a science class.”

I heard Li Siyuan talking about science class.

Students, you look at me and I look at you. I don’t know what this science class means.

“Science class is to help you understand science. What is the meaning of science? It is to help you understand nature and make good use of its laws.” “Do you know why there are cars

on the road now? That’s because there used to be people, Watching the water boil, he raised the lid of the pot. So he developed the steam engine.” “So

starting from today, I will explore the wonderful world with you.”

Because it was the first science class, Li Siyuan There is some elaboration on this course.

Let everyone know the purpose and content of their class.

After an explanation, Li Siyuan pointed to a few cabbage plants on the podium.

“Do you know what this is?”

The students are all from the mountains, so they naturally recognize it.

“Caicai!”

they said in unison.

“I can make these cabbages change color in a moment. Do you believe it?”

“I can make them black, blue, and red.”

Hearing Li Siyuan’s words, all the students were dumbfounded.

Can this cabbage change color?

Do you need to use a pen to apply color?

Everyone keeps guessing.

In everyone’s doubts.

Li Siyuan took out three transparent cups. One cup held red ink, one cup held black ink, and one cup held blue ink.

“Classmates, I don’t use a pen to paint, and I don’t dye either.” ”

I just put this vegetable, the root section below, in this colored water cup. Wait until tomorrow, these vegetable leaves will be It will all change color.”

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“Do you believe it?”

The students shook their heads in unison.

How is this possible? Just put the vegetable roots in, and the leaves on them will change color.

“Then let’s put these three cups aside first, and we’ll wait to see the results tomorrow, okay?”

Li Siyuan took the three cups with cabbage and put them aside.

Then he took out a purple cabbage from under the podium.

Seeing Teacher Li take out another vegetable, the students’ curiosity was aroused again.

“Are there any students who are good at chopping vegetables? Help me cut this purple cabbage into shreds.”

Gao Guangming was the first to raise his hand.

Go to the podium and help Li Siyuan cut the purple cabbage with a sharp knife.

They usually raise chickens and fish at home, and they have to cut wild vegetables into shreds or into small pieces.

Otherwise, the livestock would not be able to eat it.

After going back and forth, I also developed the skill of chopping vegetables.

The highlight here is when cutting vegetables.

Li Siyuan has already taken out four or five beakers.

Then he took out some familiar things.

There is sugar water, vinegar, alkali, soap and so on.

He added water to several beakers.

Put these things into a beaker with water one by one, stir to dissolve. There is also a beaker of plain water with nothing added.

Serve as a control group.

Then Li Siyuan put the shredded purple cabbage into a bowl of hot water.

Soak for a long time.

Then pick out all the purple cabbage.

“Now please come up, students, and help me add the water in which the purple cabbage has been soaked into these transparent beakers.”

Li Siyuan basically left all the practical operations to the students.

As the students added water to the sugar water and alkaline water.

Various colors begin to appear.

“Wow!”

All the students exclaimed again.

“What’s going on? Is the water used to wash purple cabbage holy water?”

“How could this happen? Is this magic?”

“Oh my god, Teacher Li, is your purple cabbage different?”

“Yes, how come there are so many kinds of colors? Each one is different?”

Li Siyuan waited until everyone had looked at it carefully and were almost shocked by the effect.

Then he began to explain to the students: “Do you want to know why?”

The students sat in their seats and stretched their necks: “I want to!”

They were at a curious age, not to mention seeing such a strange scene, they How could you not want to know why?

The camera panned over the faces of the students.

Those are the faces that seek knowledge.

Li Siyuan coughed lightly: “Because there is a substance called anthocyanin in purple cabbage. This substance will show different colors when it encounters acidic substances and alkaline substances.” Then he said

this Experiment, began to teach students about acidity and alkalinity.

All the students who listened suddenly realized.

In the live broadcast room.

Netizens were also shocked:

“Go ahead, this is the right way to start a science class!” ”

That’s right, I feel like I want to continue listening to Li Siyuan’s science class.” ”

I used to study. When I was a kid, listening to liberal arts was like a lullaby, and listening to science was like heavenly scripture. Now I listen to Li Siyuan, and every class is good.” “The college entrance examination is coming soon. I would like to know if Li Siyuan can

help me take two college entrance examination preparation classes? I request Not high, just let me get into Lanxiang!”

“My son upstairs is also going to take the college entrance examination. He said that if he doesn’t get into one, he will cook a month for me. I have already bought five boxes of instant noodles. I can’t even eat a bite of the rice he cooked. He came to torture me even if he failed in the exam. My own son.”

While Li Siyuan was teaching the students.

A program called “Looking for Little Singers Lost in the World” quietly began its preliminary preparations.