Lao Su was holding a short stick in his hand and wrote "Hundred Family Surnames" on a black-painted wooden board with great interest.
Zhao Qian Sun Li, Zhou Wu Zhengwang
after awhile.
Click——
Perhaps because I was writing too quickly, the short stick broke at the sound.
Lao Su then gave up, then turned his head, looked at Xu Yun with bright eyes, and asked hurriedly
"Xiao Wang, how do you call this thing?"
Xu Yun glanced at the short stick that had been half used by Lao Su. He was glad that he had made a few more sticks, and at the same time he couldn't help but say:
"This thing is called chalk."
More than an hour ago.
After Mr. Xie gathered all the things, Xu Yun officially started to rub the simplest thing since time travel.
chalk..
Chalk is a very common teaching tool in later generations, and it is very easy to make your own.
in century.
Just mix clay and talcum powder with water to form a dough, then put it into any tube and let it sit for a few hours, and a handful of simple white chalk will come out of the oven.
Although there is no such thing as talcum powder in the Song Dynasty, there is still pig fat.
After Mr. Xie gathered the ingredients, Xu Yun mixed lard and lime together, added water and kneaded them into a paste.
Then they are stuffed into the grinding tool used to prepare the syringe, and cooled by saltpeter, the crystal ice bought from the sour plum shop.
Waited for less than an hour.
Just a few simple pieces of chalk are enough to make it.
However, when faced with an object with such a simple production process, Lao Su burst out with unprecedented enthusiasm.
Since a quarter of an hour ago, he has been writing and drawing on the black painted wooden board with chalk.
Sometimes I write poetry, sometimes I draw circles and triangles.
From an emotional point of view, I was even more excited than when I saw allicin and a generator.
As for the reason for Lao Su’s excitement, it’s quite simple.
Although he is a well-known contemporary figure in physical medicine, when it comes to his skills, he is actually a thorough scholar.
He once taught in a school, and after his retirement, he set up a family elementary school in his hometown of Jingkou and became a teacher himself.
Therefore, the moment he saw the chalk effect, Lao Su realized the value of the combination of this small thing and the blackboard
This is a set of human religion artifacts!
Although the economy of the Song Dynasty was quite prosperous, and the standard emphasis on literature over martial arts in the court, the Song Dynasty was not much more advanced than other dynasties in terms of teaching methods.
Basically, it is a cramming education method in which the teacher reads while the students repeat.
In terms of writing, many elementary school teachers will only tell you how to pronounce the word, but they will not tell you how to write it - because there is no tool like a blackboard.
At the moment, the closest thing to a chalk and blackboard combination is something called an iron cone pen.
It is ground from an iron pestle and has a sharp tip.
In daily life, they are mostly used for engraving seals and metal hard objects. In classrooms, they are combined with stone walls or wooden boards, and teachers can engrave and teach on them.
Not to mention the reading experience of students in this mode, it is a huge test for the teacher's physical strength.
Not to mention the sharp sound that such a sharp object will make when it comes into contact with a wooden board. To be more specific, you can think of the sound when your fingernails scratch across a blackboard, which can make your toes clench tightly.
Therefore, the popularity of iron cone pens has always been limited, which means that 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 them and demonstrate the stroke sequence to them.
in this case.
If you stand further back,&bsp&bsp you may miss the teaching of stroke order.
After the coursework is over,&bsp&bspqualified students can purchase a copybook for copying.&bsp&bspThe copybook will clearly tell you the order of strokes.
As for students who don’t have the conditions, it’s going to be miserable.
If you meet a better classmate, you may be able to ask for advice on how to write,&bsp&bspBut if you have a normal relationship with your classmates or you didn’t ask during the elementary school period - you were young during the elementary school period, you may not necessarily be aware of this aspect,&bsp&bspThese people may even have reached the imperial examination stage,&bsp&bsp
I don’t necessarily know how to write a word. (Reference doijki-, a paper by an authoritative professor of Henan University)
For example, you can see at least a dozen ways of writing the word fennel for fennel beans in the Song Dynasty.
Whether a character looks good when it is formed is inextricably related to the order of strokes.
However, handwriting in the ancient imperial examinations was a bonus, so some unlucky people studied hard for more than ten years and obviously had the ability to pass the imperial examinations, but they failed 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, I didn’t lose too many points by drawing talismans.
Therefore, now that chalk is available, the quality of teachers' teaching in the classroom may be greatly improved, and at the same time, it can be widely popularized.
After all, according to Xu Yun's previous demonstration, the chalk production process and cost are extremely simple and low.
"Today there are twenty-six branches in the world, four in the capital, thirty in the prefecture, two hundred and fifty-four in the prefecture, one thousand two hundred and thirty-four in the county, and each county has two elementary schools."
Looking at the piece of chalk in his hand, Lao Su's hands were trembling slightly.
"With chalk,&bsp&bspif each county can educate three more scholars every year,&bsp&bspthat 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 handouts, and he couldn't help but feel hesitant in his heart.
Is such a young man who can take out many strange objects 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?
This chapter is not finished yet, please click on the next page to continue reading the exciting content! Although the profession of male actor is relatively restrictive, it is not impossible to redeem yourself and escape.
For example, one of the current officials in the court, Jiyingdian Xiuzi Chenling, redeemed his background as an actor. Not only did he become a good man, he even became an official.
unless
There is something hidden about him that makes him have no chance to redeem himself.
This is not something Lao Su is making up, after all, Xu Yun's own conditions are too special.
Weiye showed up at her house without a waistband or place of birth document. She carried a lot of gold and silver on her body, and her skin was tender and tender.
At the same time, his cultural literacy and knowledge reserve are not low, and he has magical prescriptions that even the masters in Beijing don't know about.
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 strange.
Is it to the Queen Mother?
Or Zhao Ji?
or
Both?
From a realistic perspective, it seems that Zhao Ji has a higher probability.
After all, this is a well-known playboy, and he and Wu Zetian are the only emperors in history who have set up relevant institutions for sex, namely the Control Bureau and the Xingxing Bureau.
Thinking of this, Lao Su couldn't help but hesitate.
If the emperor really sends people to his house to arrest Xu Yun, what should he do?
To hand over or not to hand over doesn’t seem to be a good idea.
And at the same time that Lao Su's thoughts were diverging.
the other side.
Xu Yun finally figured out the direction of his lecture notes
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 that govern natural phenomena.
For example, when we observe a certain phenomenon, we guess the rules behind it through logical reasoning and express it in mathematical language, and then verify its accuracy through experiments.
In this way, we can say that we have obtained the laws or principles of natural phenomena within the tolerable error range.
As for the basis of science
From an objective point of view, mathematics is actually ranked higher than physics.
It can be said that behind every major progress of mankind, mathematics is the strong support 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 physical knowledge were not particularly advanced knowledge in ancient China.
Especially during the Song and Yuan Dynasties, ancient mathematics developed to a quite advanced level.
If nothing else, let’s just say that he is very close to now, and he is also a person that everyone is very familiar with.
Yang Hui.
Yang Hui's triangle involves the binomial theorem, and even 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 of ancient mathematics is not low.
Even Xiao Li, a little literary bean sprout, still has some basic knowledge of mathematics.
Therefore, starting from the static knowledge concept of physics is undoubtedly a good entry direction.
Then he glanced at Lao Su who was thinking about the price (i) value (li) of the pink (zi) pen (ji), coughed lightly, and prompted
"Master, can we start?"
"oh oh"
Only then did Lao Su come to his senses and put aside the problems in his mind for the time being.
At present, Zhao Ji has just ascended the throne, and the Empress Dowager Hexiang and the civil and military officials are all in a period of running-in and testing.
Therefore, even if he discovered Xu Yun's traces, he would not be able to take any action in a short time. After all, everyone was staring at him.
Xu Yun should be safe at least until this year's Spring Festival.
Think of this.
He couldn't help but breathed a sigh of relief and said to Xu Yun
"Xiao Wang, now that you are ready, let's get started."
Finished speaking.
He put the chalk back on the table, took the initiative to walk to the sister-in-law in front of the blackboard and sat down.
As soon as we were seated.
A very subtle feeling emerged in Lao Su's heart
In the past, it was always him who taught others. This kind of situation of listening to other people's teachings has not happened in sixty years.
Of course.
As a seeker who had spent nine years in the library, Lao Su still had a high thirst for knowledge, and was far from being as arrogant as the academic circles of later generations.
Therefore, this emotion came and went quickly, and it did not affect Lao Su's concentration too much.
Just like that, a moment later.
The three curious babies, Lao Su, Xiao Li, and Xiao Zhao, all sat on the chairs obediently.
I listened to Teacher Xu’s class with great anticipation.
Xu Yun came to the blackboard and picked up the chalk.
I thought for a moment and asked Xiao Li
"Miss Li, I heard that you wrote a poem not long ago called "Like Meng Ling·Last Night's Rain and Wind Sudden Storm"?"