Into Unscientific

After more than an hour.

In a relatively remote courtyard.

Only at this moment.

Old Su was holding a short stick in his hand, and wrote "Hundred Surnames" on a black-painted wooden board with great interest:

Zhao Qian Sun Li, Zhou Wu Zheng Wang.

after awhile.

Click——

Perhaps it was because the writing was too hasty, but the short stick broke at the sound.

Only then did Old Su give up, then turned his head, looked at Xu Yun with bright eyes, and asked in a hurry:

"Xiao Wang, what is the name of this thing?"

Xu Yun glanced at the short stick that was half used up by Old Su, and he was glad that he made a few more sticks, but at the same time, he couldn't help saying:

"The name of this thing is chalk."

More than an hour ago.

After Mr. Xie got everything together, Xu Yun officially opened his hands and picked up the simplest thing since time travel:

chalk.

Chalk, this is a very common teaching tool in later generations, and the difficulty of self-made is also very low.

In the 21st century.

Just knead the clay and talcum powder with water to form a dough, then put it in any tube and let it sit for a few hours, and a simple white chalk is ready.

Although there is no such thing as talcum powder in the current Song Dynasty, there is still fat from pigs.

After Mr. Xie got everything together, Xu Yun mixed lard and lime together, added water and kneaded it into a paste.

Then they are stuffed into the mold used to make the syringe, and cooled by saltpeter—the crystal raw ice bought from the sour plum shop.

Waited for less than an hour.

A few simple chalks are ready.

However, in the face of such a simple object, Lao Su burst out with unprecedented enthusiasm.

Since a quarter of an hour ago, he has been writing and drawing on the black lacquered board with chalk.

Sometimes I write poems, sometimes I draw circles and triangles.

From an emotional point of view, he was even a little more excited than when he saw allicin and the generator.

As for the reason for Lao Su's excitement, it is also very simple:

Although he is a well-known master of physical medicine in the contemporary era, he is actually a scholar through and through.

He used to teach in the academy, and after retiring, he set up a family education in his hometown of Jingkou and became a teacher himself.

So at the moment when he saw the chalk effect, Lao Su realized the combined value of this little thing and the blackboard:

This is a set of human teaching artifacts!

Although the Song Dynasty's economy was quite prosperous, and the court also emphasized literature over military affairs, but in terms of teaching methods, the Song Dynasty was not much more advanced than other dynasties.

Basically, it is a cramming education method in which the teacher recites and the students repeat the reading.

In terms of writing, many elementary teachers will only tell you how to read the word, but they will not tell you how to write it - because there is no such tool as a blackboard.

The closest thing to a chalk-blackboard combination right now is something called an iron cone.

It is ground from an iron pestle and has a sharp point.

In daily life, it is mostly used for engraving seals and hard metal objects, and in the classroom, it is combined with stone walls or wooden boards, and the teacher draws and teaches on them.

Leaving aside the reading experience of students in this mode, it is a huge test for the physical strength of the teacher.

Not to mention the sharp sound that such a sharp object will make when it comes into contact with the board. Specifically, you can think of the sound when the nail cover crosses the blackboard, which can make your toes tightly clasped.

Therefore, the popularity of iron cone pens has always been limited, that is to say, in the field of popular teaching, there are basically no tools similar to blackboards.

Only some more responsible teachers will occasionally let students gather around to demonstrate the stroke order for them.

in this case.

If you stand at the back, you may miss the teaching of stroke order.

After the coursework is over, qualified students can purchase copybooks to copy, and the copybooks will clearly tell you the order of strokes.

As for unqualified students, it will be miserable:

If you meet a better classmate, you may be able to ask for advice on how to write, but if your classmate relationship is average or you didn’t ask when you were in elementary school—you may not be aware of this aspect when you were young in elementary school, and these people may not even know it when they reach the imperial examination stage How to write a word. (Reference material doi: 10.16346/j.cnki.37-1101/c.2002.06.022, a paper by an authoritative professor of Hebei University)

For example, in the Song Dynasty, you can see at least a dozen ways of writing the word fen in fennel beans.

Whether a character looks good after it is formed is inextricably linked to the order of strokes.

However, the handwriting of the ancient imperial examination is a bonus item, so some unlucky people have studied hard for more than ten years, and they are obviously capable of passing the imperial examination, but they overturned because of handwriting problems.

In fact, there are many similar situations in later generations. When I was in elementary school, I didn't like to practice calligraphy. In the college entrance examination, there are not too many people who lost points in ghost drawing symbols.

Therefore, with chalk now, the quality of teachers' teaching in the classroom may be greatly improved, and at the same time, it can be popularized on a large scale.

After all, according to Xu Yun's previous demonstration, the production process and cost of chalk are extremely simple and low.

"Today, there are twenty-six branches in the world, four capitals, thirty prefectures, two hundred and fifty four prefectures, one thousand two hundred and thirty-four counties, and two Mengxue schools in each county."

Looking at the piece of chalk in his hand, Lao Su's hands trembled slightly:

"With chalk, if each county can teach three more scholars every year, that will be more than 3,700 people, and culture and education will flourish."

Then he took a deep look at Xu Yun who was preparing the lecture notes, and he couldn't help but feel a wave of hesitation in his heart:

Is such a young man who can take out many strange things at will really just an ordinary actor?

Don't say anything else.

As long as he sells allicin, he must be worth at least the richest man in a state or county, right?

Although the professional constraints of an actor are relatively large, it is not impossible to get away with atonement.

For example, at present, a Jiyingdian in the imperial court compiled the Chen Ling. He was born as an actor who redeemed himself. Not only did he become a good man, he even became an official.

unless

There is something else hidden about him that makes him have no chance to redeem himself.

It's not that Lao Su is inexplicably imagining, after all, Xu Yun's own conditions are too special:

Kui Ye appeared in his family's mansion without a waist card or birth certificate, with a lot of gold and silver treasures on his body, and his whole body was delicate and tender.

At the same time, his own cultural literacy and knowledge reserves are not low, and he has a magical prescription that even the masters in Beijing don't know.

Looking at the entire Song Dynasty, there seems to be only one place where a lot of mysterious knowledge can be stored.

That is.

Palace!

hiss.

Thinking of this, Lao Su's expression suddenly became a little weird.

Is it the Queen Mother?

Or Zhao Ji?

or

Have both?

From a realistic point of view, it seems that Zhao Ji's probability is higher.

After all, this is a well-known playboy, and Wu Zetian is the only emperor in history who set up related institutions for sex, namely the Crane Control Bureau and the Xingxing Bureau.

Thinking of this level, Old Su couldn't help hesitating:

If the emperor really sent someone to his house to arrest Xu Yun, what should he do?

To pay or not to pay, it seems that it is not a good way.

And at the same time that Lao Su's thinking was diverging.

the other side.

Xu Yun finally decided on the direction of his handouts:

physical force.

In later generations of China, what people call science generally refers to natural science.

The essence of natural science is generally a description of the laws governing natural phenomena.

For example, we observe a certain phenomenon, guess the law behind it through logical reasoning and express it in the language of mathematics, and then verify its accuracy through experiments.

In this way, we can say that within the tolerance range of error, we have obtained the laws or principles of natural phenomena.

As for the basis of science

From an objective point of view, mathematics is actually a little ahead of physics.

It can be said that behind every major progress of human beings, there is a strong support of mathematics behind it.

However, considering the knowledge reserves of Xiao Li and Zhao Si, Xu Yun finally decided to start with physics first.

After all, physical phenomena are more intuitive than mathematics, and the mathematical reserves required for basic physics knowledge were not particularly advanced knowledge in ancient China.

Especially in the Song and Yuan dynasties, ancient mathematics developed to a fairly advanced level.

Don't say anything else, let's just say that he is very close to now and is also a person that everyone is familiar with:

Yang Hui.

Yang Hui's triangle involves the binomial theorem, and even until now there are some areas that have not been explored clearly.

Although Yang Hui did not achieve the achievement of simplifying the binomial when he was alive, it can at least show that in this era, the ceiling explored by ancient mathematics is not low.

Even Xiao Li, a literary bean sprout, still has some understanding of the basics of mathematics.

Therefore, starting from the static knowledge concept of physics is undoubtedly a relatively good entry direction.

Then he glanced at Lao Su who was thinking about the price (lai) of pink (zi) pen (ji) and value (li), coughed lightly, and reminded:

"Sir, shall we begin?"

"oh oh."

Only then did Lao Su come back to his senses, and temporarily put the question in his mind aside.

Now Zhao Ji has just ascended the throne, and the Empress Dowager Xiang and all the civil and military officials are in a period of running-in and testing.

Therefore, even if he found Xu Yun's trace, it was impossible for him to take any action in a short time, after all, everyone was staring at him.

At least until this year's Spring Festival, Xu Yun should be safe.

Think here.

He couldn't help but slightly relieved, and said to Xu Yun:

"Xiao Wang, since you are ready, let's start."

finish talking.

He put the chalk back on the table, walked to a small chair in front of the blackboard and sat down.

As a result, I just got seated.

A very subtle feeling emerged in Lao Su's heart:

In the past, he was the one who taught others. This kind of situation of listening to other people's lectures has not happened for sixty years.

Of course.

As a knowledge seeker who has been immersed in the library for nine years, Lao Su's thirst for knowledge is still very high, and he is far from being as defiant as the scholars of later generations.

Therefore, this emotion came and went quickly, and it didn't affect Lao Su's attention too much.

That's it, a moment later.

The three curious babies, Lao Su, Xiao Li, and Xiao Zhao, sat on the chair obediently.

I was looking forward to listening to Teacher Xu's class.

Xu Yun came to the blackboard and picked up the chalk.

After thinking for a moment, I asked Xiao Li:

"Miss Li, I heard that you wrote a poem not long ago, called "Like a Dream Order Last Night's Rain and Wind Sudden"?"