tenth year of teaching

Chapter 12 Lesson [-]

At 9:1 am on September 8st, the opening ceremony of the school affiliated to the No. 30 Middle School in Yuyang District, BJ City was held on time.

Stylized content: display of military training results, speeches by student representatives, speeches by teacher representatives, messages from the principal, and speeches by participating leaders of the Education Committee.

After the military training, most of the freshmen in high school sat upright and listened carefully.As the sun gradually rose, Li Hai, who was at the end of Class 12, couldn't bear it anymore and started to twist around. Chu Xia walked over and kicked the leg of his chair, "What are you doing?"

"It's too hot, Sister Chu."

"Call the teacher, I'm tickling you again. Listen carefully and don't move." Seeing Li Hai sitting upright with a sad face, Chu Xia felt a little funny.

The leaders are impassioned above, while the students are sitting on pins and needles below. Who is this opening ceremony for?
The ceremony is over and the fourth and fifth periods are normal.The first class of her teaching career in early summer was in Class 14. She walked with the teaching plan and materials in hand while still thinking about the content of the previous lesson preparation.

Because Teacher Su Jingyu also serves as the class teacher, everyone is very busy, so I only gave everyone a brief outline.You still have to figure out the remaining details yourself.For this reason, I went to Xidan Book Building during the summer vacation in early summer and bought a bunch of reference materials.

How to start this first lesson, how to proceed, how to summarize, what examples to use and what types of questions to use. I have already prepared them in detail in early summer. There are three colors of notes in the lesson plan book, written and drawn, densely packed.Even so, she still couldn't help but feel a little nervous. Although she had taken classes before during her internship at school, this was the first time she formally entered the classroom like this.

The preparation bell rang, and Chu Xia stood on the podium.The students in the audience were still talking in twos and threes, but she said nothing and stood quietly on the podium looking at everyone.

An Lei didn't know where he got her mobile phone number after that meeting, and the two of them would sometimes send messages to chat for a while, mostly communicating about asking for advice and being asked for advice.For the first class, An Lei told her not to "manage" the students in a hurry, but especially to "watch" at the beginning. Sometimes "not telling" is more effective than "telling".

Whether this method is effective can actually be known by watching the students in the audience calm down a little bit.The school bell has rang, "Class."

"Stand up." The monitor is a tall boy with a very deep voice.

"Hello everyone, my name is Chu Xia. I first met in the summer. We need to work together in the chemistry class in the next year." She turned around and wrote her name on the blackboard.

Some students in the audience began to bite their ears gently, "This name is interesting."

"What is chemistry?" Chu Xia turned around and saw someone talking, so he took a chance to speak to everyone.

"Chemical pollution, factory exhaust..." Some people rushed to answer.

"Whether you're right or wrong, what is chemistry?" Chu Xia said as she walked off the podium and came to a girl.

She picked up the girl's pencil case and said, "This is a chemical. Most pencil cases are made of leather, synthetic leather, cotton, Oxford cloth, or plastic. Take plastic as an example, it is generally made of high-quality polymers made of organic monomers. Molecular compounds, this belongs to the category of organic chemistry." She took out another pen, "This pen is also a chemical, with a plastic shell and a pencil lead made of carbon. Carbon has a lamellar structure. When the pen is put down, the lamellae are rubbed together. When the slide is left on the paper, the handwriting is formed.”

Putting down his pen, he walked to a boy at the second table, took off his glasses and raised them up: "These are also chemicals. Most of the frames are made of resin, which is plastic." Chu Xia put down his glasses and grabbed the boy's hair and said : "Animal hair is made of protein. Who has scissors?"

The girl at the first table excitedly handed over a pair of scissors.

Chu Xia conveniently cut off the handful of hair he grabbed just now, and the boy's bitter face made everyone laugh.

"Who has a lighter?" Chu Xia asked with a smile.

A tall boy in the last row raised one. "This classmate is very helpful. What is your name?"

"Teacher, my name is Tang Ye." The boy replied with a smile.

"Go to the homeroom teacher to claim your lighter after class, classmate Tang Ye." Chu Xia gently asked, causing another burst of laughter.

"I'm going to do a simple experiment for everyone." As she said that, Chu Xia twisted her hair into a strand and lit it. She saw that the hair burned quickly and curled up, giving off a burning smell. She flicked out the flame, twisted the curly hair with her fingers, and opened it. Show your finger to everyone to see the black mark on it. "This is a unique property of protein. It will smell like burnt feathers when ignited. We can usually use this method to test silk products."

The students looked up with great interest. Chu Xia looked down at the boy who had his hair cut off and added with a smirk: "Or to put it in layman's terms, it smells like burning pig hair." Everyone laughed again. , the boy was depressed, "Teacher, you've already criticized me twice."

Chu Xia returned to the podium with a smile and faced everyone. "Many people always talk about chemical pollution, but chemistry is not only harmful. To be precise, it is indispensable around us. Everything you use, eat, wear, breathe, and even you are a chemical. Chemistry is everywhere, and the world is made up of chemistry. It can be said that without chemistry, there would be no human beings, and there would be no world. The outbreak of World War II is also related to chemistry, have you heard of it?"

Looking at the confused and excited students, she continued: "At the beginning of World War II, some countries in Europe and the United States thought that Germany could not be launched. Because fighting the war required gunpowder, and the production of gunpowder at that time was inseparable from an ore, which was saltpeter. The production of saltpeter in Germany is extremely low. Other countries thought they could suppress the outbreak of war by controlling the export of saltpeter. Who thought that a German chemist invented a new method, a raw material and its cheap production method..." There was a deliberate pause in early summer.

"What is it? Say it quickly, teacher."

Seeing that everyone was very interested, she smiled and took it.

"Wow, that's amazing." Tang Ye interjected exaggeratedly, "Nitrogen accounts for 78% of the air, so it's inexhaustible."

"But, do you think there is something wrong with this chemical method?"

The students fell silent, "No, teacher. In fact, explosives can dig tunnels, build roads, bridges, etc., and have many uses."

"Yes, so is there something wrong with the chemistry itself?"

"No."

"So what's the problem?"

"People are the ones who use it."

"By the way, I hope everyone likes chemistry and uses chemical methods correctly. Also, I want to remind you, never mess with the chemistry teacher, I can make you disappear silently!" Chu Xia raised a finger. He shook it in front of his eyes and made a joke.

Looking at the laughing classmates in the audience, Chu Xia was very happy.

Classrooms should be fun, educational and fun, easier said than done but truly useful.

A qualified teacher must first be able to inspire students' interest in this subject, liking the teacher or liking the subject is the starting point of success.

(End of this chapter)