Lin Yin said a few raw materials, and the three brothers helped Lin Yin find it, which is not difficult to make chalk, but the difficult thing is to be dust-free.

After Lin Yin made it, because there was no blackboard at home, he could only go to school for experiments.

Teacher Sun learned that Lin Yin was going to make dust-free chalk, and was very curious, and felt that Lin Yin, a child who was not only smart, but also had a good brain and strong hands-on ability, so he also joined the team.

Lin Yin worked with everyone to make three pieces of chalk overnight, which looked a little rough and the color was snow-white.

Lin Yin took the first piece of chalk and wrote two words on the blackboard, the handwriting was clear, but it was too soft, and it still didn't work.

Lin Yin picked up the second chalk and wrote two words on the blackboard, but before the words were finished, it snapped and broke, this powder is very close to the chalk used by teachers in school, there is a lot of dust, and the writing is not smooth, but it is still not good.

Lin Yin picked up the third chalk, the writing was smooth, the handwriting was clear, and there was not a lot of powder, Lin Yin's eyes lit up, and he felt that he could.

However, it is still not as good as the feather brand chalk she used in her previous life, but this powder is much better than the chalk used by the school teachers.

Teacher Sun stood aside, also excited, and said in surprise, "Lin Yin, this piece of chalk is really good, it's better than the one in school." ”

Lin Yin nodded, anyway, there is still a little bit of material, I have to try again.

Teacher Sun patted Lin Yin's little shoulder and said with relief, "It's already very good, you are only 9 years old this year, and many children like you are still playing with mud, so don't put too much pressure on yourself." ”

Lin Yin smiled and nodded, "Thank you, Teacher Sun, I know." ”

At noon the next day, Lin Yin was going to school, and Lin Aimin was going to see Lin Yin off.

Walking on the road in the village, the villagers saw their father and daughter greeting each other with a smile, and learned that Lin Yin was now in the third year of junior high school, and many villagers were surprised at the same time, and at the same time, they looked at Lin Aimin's eyes with envy, and felt that the four children of Lin Aimin's family were too sensible, especially the youngest one, who was only nine years old this year, and was in the third year of junior high school, which was also too smart.

Lin Aimin enjoyed the envious eyes of everyone all the way, not to mention how happy he was.

When the father and daughter were about to leave the village, they didn't expect to meet Yang Liu who was returning to the village.

Lin Yin hadn't seen Yang Liu for a long time, and at this time, Yang Liu was wearing a red floral gown, black pants on his lower body, and two braids, looking at Wen Wen quietly.

Yang Liu also saw Lin Yin's father and daughter, his face changed immediately, and he quickly lowered his head and hurried back to the village from the father and daughter.

When he arrived at the school, Lin Aimin asked Lin Yin to enter the school quickly, and he turned around and left.

It's not early now, and I have to hurry home, otherwise it will be dark when I get home.

Lin Yin looked at Lin Aimin with some distress, when she came, Lin Aimin still carried her on her back for a while, just sent her to school, and wanted to go back quickly, Lin Yin made up her mind in her heart, she must find a way to earn a bicycle for her family.

With the mosquito coils made by Lin Yin, the people in Lin Yin's dormitory never bothered by annoying mosquitoes when they slept at night, which attracted the envy of people in other dormitories, and they all wanted to snatch Lin Yin to their dormitory.

Lin Yin also tells stories every night, but the time is greatly shortened.

Zhao Yanan originally said that he would come to see Lin Yin once every other week, but Lin Yin was reluctant to let Zhao Yanan go back and forth, and did not let Zhao Yanan go to school to see her again, after all, their home was too far away from the school, in fact, they couldn't say far, they could only say that the road was not good and it was too delayed.

While Lin Yin is studying, he is also continuing his own research.

Two weeks passed in the blink of an eye, and on Thursday and Friday of the second week, the school held a monthly exam, and Lin Yin answered very easily.

On Saturday morning, Lin Aimin came to pick up Lin Yin.

Lin Yin has been doing her own research for the past two weeks, looking for ways to improve chalk.

When she returned home this time, she immediately pulled her three brothers to make chalk, Lin Yin was undoubtedly extremely smart, and after her unremitting efforts, she finally made a chalk that was easy to use and had less chalk ends.

Lin Yin made a lot of chalk with her three brothers, Lin Yin asked her three brothers to send some to primary school, and she took the rest to school.

During the class on Monday, Teacher Zhou found that on the podium, there was a kind of chalk that was slightly longer than usual and not too round, and Teacher Zhou picked it up curiously and looked at it.

Lin Yin hurriedly said: "Teacher, this is the chalk I made, it is very easy to use, and there is less powder, you can try it." ”

Teacher Zhou looked at Lin Yin in surprise, "You made it yourself?" ”

Lin Yin smiled, "No, my three brothers have also helped me a lot." ”

Teacher Zhou gasped, looked at the smiling little girl in front of him, curiously picked up the pen, and wrote a few words on the podium.

The writing is smooth and the handwriting is legible, which is very good.

Teacher Zhou thought of Lin Yin and said: This kind of chalk powder is relatively small, and then wrote more words, picked up the blackboard on the table, erased the words on the blackboard, and found that the dusty and choking chalk end in the past was almost not felt at this time.

Teacher Zhou looked at the chalk in his hand in surprise, and then turned his head to look at Lin Yin, "Very good." ”

After receiving Mr. Zhou's praise, Lin Yin smiled again.

In the first class, when Mr. Zhou was in class, he used the chalk made by Lin Yin to write a formula full of blackboards, and after writing, he picked up the blackboard to erase, and when he wiped it, he found that even if he wrote a whole blackboard, when he wiped the blackboard, the chalk was very little, and it had almost no impact on people.

After the first class, Teacher Zhou was going to teach the students in the second class, and before leaving, Teacher Zhou couldn't help but take a few more pieces of chalk made by Lin Yin.

When they arrived at the second class, the students in the second class didn't care about it at first when they saw Teacher Zhou coming, but when they saw Teacher Zhou holding a few white chalks in his hands, they couldn't help but have a trace of doubt in their hearts, isn't there chalk on the lectern? Teacher Zhou came to class with chalk.

The students in the audience didn't know, but Teacher Zhou could feel more and more the huge difference between the chalk made by Lin Yin and the chalk provided by the school.

When Lin Yin's Chinese teacher in his class was in class, he didn't care about it at first, but when he picked up the chalk on the lectern and wrote on the blackboard, he couldn't help but sigh softly, this chalk was too smooth to write, and the handwriting was clear.

The Chinese teacher didn't think much about it, and when he finished the class, he had already written all the words on the blackboard, and then, when he wiped the blackboard, the Chinese teacher found that he didn't feel much chalk foam, which was completely different from the previous time when he covered his nose with one hand and wiped the blackboard with the other.

The Chinese teacher looked at the chalk in his hand and couldn't help but chuckle, "This chalk is really good!" ”

The Chinese teacher didn't know that this chalk was made by Lin Yin, but when he went to the second class in the next class, he felt that the chalk didn't feel right, and when he wrote on the blackboard, the chalk would break if he used a little more force, and the handwriting was sometimes not very clear, and there was a lot of chalk foam.

The Chinese teacher couldn't help but say to the head of the second class, "There is a new batch of chalk in the school, and it is good to use it, you remember to get some new chalk from the school in the next class, this kind of chalk is too bad to use, and the chalk and chalk foam is less." ”

The second class leader didn't understand this, so he nodded and agreed, and after the Chinese teacher got out of class, the class leader went to get the chalk, but learned that the school had been using the original chalk and had not changed.

The class leader was puzzled, but he didn't take it seriously, thinking that the Chinese teacher had made a mistake.

After that, every teacher who came to the class was amazed at how easy it was to use chalk, after all, the teacher is a person who deals with chalk every day, and they can easily notice the difference between chalk and chalk.

The box of chalk made by Lin Yin quickly ran out, and these teachers went to the school one after another to inquire, but they learned that the chalk in the school was the same as before, and there was no difference.

Where did the chalk used in the junior high school class come from?

These teachers approached Teacher Zhou, who smiled and said, "Those chalks were not bought by the school, they were made by Lin Yin." ”

Because Lin Yin is too good at studying and only 9 years old, she is a small celebrity in school, and the teachers in the school know her.

The teachers of each subject were surprised when they learned that it was the chalk made by Lin Yin, especially the chemistry teacher couldn't help but laugh, "This Lin Yin is really amazing, few people can combine what they have learned with practice, she is simply a little inventor in our school." ”

A school teacher asked Teacher Zhou, "Teacher Zhou, the chalk made by Lin Yin is so good, can you tell that little guy?" Let her make another batch. ”

Teacher Zhou pondered for a moment and said, "The chalk made by Lin Yin is very useful, but she is now a junior high school student, and I think her most critical task at present is to study. ”

Although the teachers really wanted to use the chalk made by Lin Yin, they were not shameless enough to let Lin Yin make it for them for free.

Mr. Zhou himself also wanted to use the chalk made by Lin Yin, so he took the initiative to find Lin Yin and tell Lin Yin about it.

Lin Yin was happy, thought for a while and said, "Teacher, in fact, I want to set up a chalk factory in the name of the village to specialize in making chalk, so that it can not only solve the employment problem, but also improve the living standards of the people." ”

Teacher Zhou was taken aback when he heard this, and hurriedly said, "Can this work?" ”

After all, it is still not allowed to do business in this era, Lin Yin said, "The establishment of a chalk factory in the name of the village is a collective interest, and I think I should agree to it." ”

Teacher Zhou thought for a while and said, "In this way, I will also react to the principal of our school, and ask him to help you ask, if it is okay, then it will be great!" ”

Lin Yin smiled and nodded, "Okay, trouble Teacher Zhou." ”

Teacher Zhou smiled and said, "I am also selfish, and it would be great if all teachers could use chalk like this." ”