OBS Chapter 1467 County School Mathematics Teaching (2)
Chapter 1467 County School Mathematics Teaching (2)
It turns out that hitting students with a ruler feels so good; at this moment, Sun Shan couldn't wait to strike again with the ruler.
No wonder the teacher liked to hit his students with a ruler so much; he was addicted to it.
Sun Shan then pointed to a thick tree not far away and said, "This tree isn't very tall; we can use a ladder to measure it. But what about that big tree? How do we measure it?"
Not far away stands an incredibly tall and robust tree, which is the birthday tree of Yuanlu County School.
The big tree has been planted for as long as the county school has been built.
The students all looked at the tree, shook their heads, and said, "Sir, that tree is so tall, we can't climb it with a ladder."
Suddenly, a student of about thirteen or fourteen years old mustered up his courage and suggested, "Sir, I am good at climbing trees. I can climb up and measure it."
As soon as these words were spoken, everyone burst into laughter.
Sun Shan laughed and shook his head: "Even if you dare to climb up, I wouldn't dare let you. What if you fall?"
This idea is absolutely unacceptable. Sun Shan's face turned cold in an instant, and he said seriously, "This student is not allowed to climb trees anymore. It's too dangerous."
Then he said to Instructor Deng, "Instructor, go back and tell this student's parents that they must not let him climb trees. He's a very mischievous boy. If he falls down while climbing, he'll lose an arm or a leg and will never be able to take the imperial examinations again."
Instructor Deng glared at the primary school student and said solemnly, "Sir, I understand. I will have this student's parents come to the county school."
Primary school student:.......
a bolt from the blue!
Just because he let slip one sentence, he's already meeting the parents? Braised pork with rattan cane is a must.
The little boy trembled all over, wishing he could turn back time so he could never have said those words.
The other students looked at the elementary school student with pity.
Oh dear, how pitiful! After Lord Sun leaves, the parents won't be the only obstacle, but Instructor Deng will be the real challenge.
Tsk tsk~~ This elementary school student, you'd better watch yourself, your senior brothers can't help you.
Sun Shan then pointed to the high mountain not far away and said, "Students, once you learn arithmetic, you can measure not only trees, but also mountains and tall buildings. This is the charm of arithmetic. The more you learn arithmetic, the more you will love it."
Many students are terrible at math and don't believe Sun Shan's words at all.
Of course, with the example of the elementary school students, the students remained silent, only secretly criticizing in their hearts.
Seeing that they didn't quite believe him, Sun Shan started a math practice activity class, demonstrating to the students how to use math to measure the height of a tree.
Sun Shan smiled and said, "Everyone, enough with the nonsense. Now I'll teach you how to use arithmetic to measure the height of this tree in front of you."
Sun Shan's words piqued the students' interest again.
They craned their necks, all staring intently at Sun Shan measuring the tree.
There are various methods for measuring tree height.
Since the principle of proportion has been explained, Sun Shan adopted the shadow proportion method for measurement.
Use a straight pole of known height to measure the length of the pole and its shadow, then measure the length of the tree shadow. Using the proportions, you can calculate the tree's height.
Sun Shan quickly calculated the height of the trees, leaving the students wide-eyed in astonishment.
Even the usually mature and composed Scholar Zhong couldn't help but ask, "Sir, is it really that simple?"
All you need is a straight pole and a measuring tape to calculate the height of a tree? That's much easier than climbing up a ladder.
Sun Shan smiled and said casually, "It's that simple."
Then, Instructor Deng had the servants set up a ladder to directly measure the height of the tree.
The final conclusion, though flawed, was quite close to the truth.
The students exclaimed in surprise, "It really is exactly as Lord Sun calculated! My goodness, if Lord Sun hadn't told me, I really wouldn't have known that it could be measured so easily."
To verify this conclusion, Sun Shan found several trees that were not very tall to measure, and the results were also quite similar.
The students exclaimed in surprise, "Sir, this is amazing! It's so easy to calculate! My goodness, it seems that learning mathematics is very useful!"
The students carefully observed the straight rod and the measuring tape. They seemed so ordinary, yet with such simple tools, they were able to calculate the dimensions of a tree.
The topic for sixth grade
Sun Shan continued, "Everyone, this method uses the principle of proportion for measurement, but it has certain conditions. For example, it needs to be sunny, with shadows being clearer around noon, and the ground being relatively flat."
Specific problems require specific analysis; when using mathematics, we must clearly understand the surrounding environment. However, no matter how many times we practice, the principle remains unchanged. Once you grasp this principle, no matter how difficult the problem, you will still be able to apply it correctly.
The students were completely confused, not understanding what Sun Shan was trying to say about a principle he had repeated a thousand times.
Sun Shan didn't expect his students to understand it all at once.
They remember today's lesson, and perhaps one day, after experiencing more, they will understand it.
Then Sun Shan explained to everyone the different methods for measuring tree height.
For example, the triangle principle, Thales' theorem, and various measurement methods are available for you to choose from.
The students stared at Sun Shan in disbelief when they heard that there were actually many ways to measure development using mathematical principles.
Although I didn't quite understand these methods, Lord Sun's calculations were so sophisticated, it was truly amazing.
One student couldn't help but ask, "Sir, you just mentioned that tall buildings and mountains can also be measured using arithmetic?"
Sun Shan gave him an affirmative look and said definitively, "Of course you can. The higher the place, the more complicated and difficult it will be to measure, but the principle remains the same. If you have the resources, you can definitely give it a try."
Upon hearing the definite answer, the student looked at Sun Shan with sparkling eyes, his face full of admiration.
Afterwards, a wave of measurement enthusiasm arose in Yuanlu County.
Students who understand the principles and have the necessary resources, when they see something taller than themselves, even though they could simply lay it flat and measure it directly, insist on using mathematical principles to calculate its value.
In the end, it was the old-fashioned Instructor Deng who feared that the students would become distracted by frivolous pursuits and forbade their "misbehavior".
In the morning, Sun Shan was promoting his free mathematics book, and in the afternoon, he was teaching students how to write the eight-legged essay.
Although writing is far inferior to doing arithmetic, Sun Shan is still a top student among the less capable ones, several levels above the novices present.
The students listened with great interest and eagerly asked, "Sir, when will you come to the county school to give lectures again?"
In particular, many of the scholars who were going to take the provincial examinations.
If Sun Shan had stayed at the county school to teach, they certainly wouldn't have returned to the prefectural city to study.
Sun Shan doesn't have time to immerse himself in the classroom; he's an administrative worker with a busy schedule, and it's already difficult for him to find the time.
Looking into the eyes of the other people, I dared not say no.
He could only give a vague reply: "Fellow students, I will come whenever I have free time."
As for what mattered, the final interpretation rested with Sun Shan.