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Write an unforgettable lesson, about 400 words.
1. Unforgettable class composition of 400 words. Unforgettable classroom has different experiences, different classes have different experiences and different classes have different gains.

The day before the final exam, our Chinese teacher, Miss Wang, gave us the last lesson, the content of which I will never forget. At that time, the students were taking the time to review and planned to do the last blog.

The Chinese teacher walked to the podium with heavy steps, looked at each student affectionately and said, "Students, this is the last lesson I will teach you. I will be promoted to vice president next semester, so I won't teach you." I don't talk about texts or compositions in this class, only three words. "

Before the exam, the teacher would always say a few words and emphasize something related to the exam. Today, the teacher's unusual words made me feel very strange. What will the teacher say? I pricked up my ears and listened carefully.

The first word is "sincerity". The teacher wrote the word "honesty" on the blackboard, and we began to whisper.

Suddenly a classmate stood up and said, "honesty means not lying, not lying." Do you need to say such a simple thing? " But Mr. Wang explained with a smile: "Honesty is not just telling lies. Only honest people can gain the trust of others. Winning the trust of others is more precious than anything else."

After listening to the teacher's explanation, the classmate just blushed and bowed his head in shame. I also understand that Mr. Wang will teach us something more important and precious than knowledge in the last class-the truth of being a man.

The classroom was quiet, and the students listened carefully for fear that they had missed something. "The second word is' down-to-earth'.

Only by studying in a down-to-earth manner, laying a solid foundation for primary schools, never giving up when encountering problems, and seriously trying to solve problems can we succeed. "The Chinese teacher said meaningfully.

The students were deeply moved, and some even shed tears silently. The third word I want to say is' be kind to others'.

The teacher went on to say, "Being good to others means being good to yourself. Seeing others happy, I believe I must be happy. If you are upset because of a small matter, it is someone else's fault, punish yourself. "

As soon as the teacher's words fell, he won a burst of applause from his classmates. The students all know that the teacher is telling us to be an open-minded person.

Teacher Wang, the Chinese teacher, is really well-intentioned. I benefited a lot from this last class. I will remember the teacher's inculcation for life.

2. An unforgettable composition class. An unforgettable lesson in less than 400 words.

Since I entered primary school, I have taken many classes, including lively Chinese class, interesting math class and endless mysterious nature class. A science class in grade three is still fresh in my memory.

It was a Tuesday morning three years ago, near the school, and Mr. Hong gave us a special assignment, that is, everyone went home to prepare two egg shells. We were all stunned when we heard the teacher assign this homework. Some people speculate that maybe the teacher will let us make it by hand. Some speculate that the teacher may want us to draw eggs; I guess Mr. Hong must let us do the experiment.

Looking at our puzzled look, Mr. Hong gave a "mysterious" smile, as if to say, "The answer will be revealed in the next class."

At the beginning of the class, everyone was anxious for Mr. Hong to solve the mystery quickly. Miss Hong guessed our thoughts and said slowly, "Students, please put the prepared eggshells on the table. We are going to do an experiment with this eggshell. " I was very proud when I heard that I was going to do an experiment. I guessed Mr. Hong's intention.

"Students, look at this eggshell. Is the arched side easy to break or the sunken side? "

The students said in unison, "The concave side is easy to break."

"Why?" No one knows why.

Teacher Hong went on to say, "Please take out the prepared eggshells and let's do an experiment together."

I put the eggshell on the ground, arched my face, raised my pen about 5 cm high on the eggshell, and gently put it down, and the pen touched the eggshell. Alas! The eggshell is safe and sound. I thought: maybe I didn't work hard! Or try again. This time, I just aim the pen tip directly at the arched surface of the eggshell and pound it hard. Strangely, the eggshell is still intact. I looked around and my classmates looked puzzled like me.

Seeing that we were at a loss, Mr. Hong smiled and said, "Students try again with the concave surface of the eggshell and compare their differences."

We turn the eggshell upside down, so that the concave surface of the eggshell faces upwards, and break the eggshell with a pen. It turns out that the concave surface of the eggshell is so fragile.

"Teacher, why is this?" Some students lost their temper and began to ask questions to the teacher.

Teacher Hong conveniently picked up an eggshell on a classmate's desk in the front row and said, "This is the principle of thin shell structure. Because the arch surface of this structure can offset the external force, the structure is stronger. The Great Hall of the People in Beijing and the Sydney Opera House make full use of this principle. Of course, the thin shell principle is everywhere in our daily life. Please ask the students to discover and explore. "

Over the past few years, I have gradually discovered that helmets and car windshields ... all come from the thin shell principle. Teacher Hong's class left me with a lot of thoughts.

3. An unforgettable 400-word class composition In my memory, there are many unforgettable things, some of which make me happy, some make me regret having a class, and some are my childhood playmates. But none of this is my most memorable. In my memory, the most unforgettable thing is not a thing, not a playmate, but a lesson, a music lesson that I still remember.

In retrospect, it was twelve years ago. At that time, I was in the first grade of primary school. I was in Class Six at that time, and our grade classes were all first-class. So every teacher likes to talk in our class during class. Well, the music teacher found us again and said that he would take us to the city for classes. We were so happy that we all agreed.

On the day of class, we came to a big classroom, and many teachers came to attend the class. We jumped after watching it, and then stabilized our emotions, so we felt nothing to be afraid of. We're ready to go.

At first, we practiced pronunciation with our teacher. Let's start with "me" and "you" The students all practice very hard. Some practice sweating, some turn their faces into red apples, and some practice out of breath. Then, we practiced several sets of sounds. Some voices are high, others are low. No matter which part you sing, you sing accurately, just like playing the piano.

Later, we learned a new lesson and learned to sing the songs of the Young Pioneers. The teacher spoke very vividly. First, write down the score with chalk, and then say the key parts of the song. As he spoke, he drew the key parts. After that, the teacher played the piano again and taught singing step by step. Some places are more difficult, so teachers sing more, for fear that we won't. Some places are relatively simple, and the teacher sings less, so it will pass. Not only did the teacher speak well, but we also cooperated well. We all listen to the teacher's instructions. As soon as the teacher spoke, we buried ourselves in reciting. When the teacher wanted to sing, we immediately stopped writing and listened carefully to the nuances. When the teacher asked us to sing, we sang at the top of our voice.

In this way, we quickly learned this song and were able to sing it well. It's almost time for class to end. We will sing after class. The students cheered, and with the teacher's music, we began to sing. Just listen to songs dancing in the whole classroom, floating in the whole classroom. All the teachers present seemed to be intoxicated. Some teachers close their eyes and savor. Some teachers are still beating their hands. Some teachers can't even help singing with us. The song played for a long time before it stopped, followed by a flood of applause, which proved our success and victory.

That class is my most unforgettable, because we not only achieved success, but more importantly, it taught us that cooperation is the guarantee of success.

4. Unforgettable class 400 words Today's composition class is unforgettable for me.

In the composition class, after I finished my composition, Teacher Chu said to me, "Wu Zhao, will you help me evaluate Li Chongyi's composition?" I readily agreed, and carefully revised Li Chongyi's composition, and then gave it to Teacher Chu. Teacher Chu read my revised article, praised me for my good progress, and said to me, "The teacher asked you to be the teacher's little assistant." I am very happy to hear that. At school, Li Chongyi said to me, "Wu Zhao, you changed it too carefully, so I haven't done it yet.

I didn't have time to copy my homework because I helped Li Chongyi correct his composition. Just when I was worried, I didn't expect three students in our group to copy an assignment for me. Looking at my homework, I was very moved. This is really timely help.

In this composition class, I not only won the honor of assistant Chinese teacher, but also won the friendship of my classmates. I have always misunderstood my deskmate before. What a pity! I'm glad to have these classmates. This composition class is really hard to forget!

As a student, it is inevitable to attend classes every day. Over time, no matter how good the class is, it can't attract me. But this time, I was really attracted, deeply attracted. ...

It was an ordinary day, and people couldn't see the difference. After class, I was still joking with my classmates, but after class, I became a cry baby!

The teacher stood on it with a serious face and said, "Today, let's play a game. Please write down the five people you love most in the world on paper and start writing. " The smile on my face froze. I remember this game, but I didn't think I would play it in the classroom! My pen is getting heavier, and I dare not write. I'm afraid of making mistakes. After reading it for a minute, I wrote: Dad, Mom, Grandpa, Grandma, Sister! I don't understand why I wrote this. I have an impulse to stop writing. I know, this is a warm current of the family.

"Let's cross out one of the five people you wrote!" I froze again, but I pursed my lips and crossed out my sister! Although my sister and I are related by blood, after all, there will only be one less playmate. I also know that there is no turning back after crossing it. What I will lose is happiness, happiness and loneliness! "Cross out another person." I don't want to start, but this is the rule of the game. I made up my mind to cross out my grandfather. At that moment, I felt that the sky was falling, so unbalanced! Tears began to roll in my eyes, and I knew the teacher would let us cross out the third person. Sure enough, the teacher gave us an order. I crossed out my grandmother, and I was speechless for a long time. This may be nothing to say! What happened next surprised me a little. The teacher asked us to cross out everyone. Although it is a game, I feel my heart is bleeding when I cross it out. The blood that flowed out seemed to cover my life. I feel so afraid of death! At that moment, I felt lonely and helpless. ...

The teacher asked us to give this class a name. I thought of "I am the only one in the world", and my feelings are not only like a poem, but also like a song. If I have a gift for composing music, I will certainly compose music. ...

"Book Rinrin-"After class, the teacher said a very plain sentence: "I feel that the home class is over, class is over!" My mind is blank, and only the word "family" lingers in my mind. ...

5. An unforgettable course outline composition 400 words Chinese class, math class, English class, music class, thinking class, physical education class ... As the name implies, these are all primary school courses. What subjects do I like best (except Chinese and math)? I will not hesitate to answer: science class. If you ask me which class is the most unforgettable, I will say: it is the fourth science class this semester. Why? Don't worry, tell you slowly for me ... the bell rang, and everyone rushed into the classroom. This is a science class, and the nature books with dark blue covers are already on the table. Just as I was doing eye exercises leisurely, the teacher said, "Chen Lu, come here." The science teacher called me? What is this? Thinking about this question, I went to the podium table. "Give me these convex lenses, one for each table." Then the teacher sat in a chair to prepare lessons. Oh, that's what happened. It's easy. While the teacher was unprepared, many students turned a blind eye to doing eye exercises and whispered, "Hey, bring one." Looking at the students' curiosity. After doing eye exercises, class begins. The teacher said, "Students, today, let's learn the fourth lesson-convex lens. Please look at the convex lens on your desk first and see what features it has. " Everyone is curious to pick it up and play. Some people look at it with their eyes, while others touch it with their hands. After a while, the students expressed their opinions-"thick in the middle" and "transparent" teachers asked questions. Everyone is eager to follow up. The teacher doesn't know who to call. Let the class answer together: "A transparent lens with a thin edge and a thick middle is called a convex lens." "Well, who can give an example?" "me!" The "pistachio" in the class volunteered: "Magnifier." "Not bad, anything else?" The teacher smiled and asked again. Everyone racked their brains and couldn't figure it out The teacher asked us to go back to observe and answer next class. "Next, please open your books and draw the concept first; Think again about some problems in the book. If you need to experiment with the convex lens in your hand, you must pick it up and do it, or you can discuss it in groups. " The teacher said with a smile. "good!" The students answered in unison. The originally silent teacher suddenly exploded the pot. Everyone speaks freely and cherishes this rare personal experiment class. After about 15 minutes, the teacher asked questions again and the students all answered them. With 10 minutes left before class, the teacher asked us to play the game of convex lens. There was a ring at the bell The teacher asked everyone, "Students." Got it! ""Do you know why teachers wear convex lenses? " The "philosopher" in the class stood up and said, "Because the teacher asked us to do experiments ourselves, let us have a deeper understanding of convex lenses." "Yes, the teacher just wants you to have a deeper impression on the convex lens. Ok, class is over. "The teacher said with satisfaction." Thank you, teacher. "This lesson will never be forgotten by me, and it has become my most unforgettable lesson.

6. My most unforgettable classmate composition of 400 words During my six years of primary school life, many people left a deep impression on me, including classmates and teachers ... But what impressed me the most was Xu Yanan, a close friend who spent a spring and autumn with me. In a Chinese class in my second grade primary school, the teacher took a little girl. After introducing myself, I know her name is Xu Yanan, and she comes from the countryside. A big flat nose, as big as a pumpkin; Thick lips, so thick that people feel that she never talks ... I keep these in mind, and the word "really ugly" comes to mind. What makes me even more angry is that the teacher asked her to take my place. But all this happened with one thing that changed my impression of her 180. Once, in a science class, the teacher wrote a piece of knowledge about nature on the blackboard. I forgot to bring at least one thing a day. I rummaged through my desk and my schoolbag, but I still couldn't find my notebook. Seeing the teacher approaching me, I was about to find that I forgot to bring my notebook. When it thundered, I only heard a bang. Xu Yanan grabbed half of his notebook with both hands and pushed it to me. I almost. Listening to her nonstandard Mandarin, I finally said, "You ... isn't this the soft copy that your aunt just sent you back from Beijing?" How can you give up! " Xu Yanan smiled at me and said, "Take it!" Looking at her notebook, I remembered that Xu Yanan's pencil broke lead in math class a few days ago. Because she didn't have a knife, she dug with her hands, just like she had just finished hitting the chimney. When she gave me a pleading look, I knew I had a knife, but I still ignored her. Xu Yanan didn't finish her homework because she spent a lot of time digging pencils. She was severely criticized by the teacher ... Now. I was very moved and was not criticized by the teacher. At the moment the bell rang, I finished my natural homework. After handing in my homework, I wrote a note to Xu Yanan, with only three words "I'm sorry" on it, but these three short words ushered in Xu Yanan's generous and precious note, "Never mind, let bygones be bygones, and may our friendship last forever".

7. Unforgettable class composition is an unforgettable thing for me. There are many unforgettable things in my primary school life, and this one is the most unforgettable.

It happened to be rainy, so I took shelter in front of the store without an umbrella. Suddenly, my eyes were attracted by a lovely little boy. He is about five or six years old, with a shiny flower umbrella washed by rain in his chubby little hand and a sweet and delicious cake in the other. Rain mixed with mud splashed on his feet, but he didn't care. I saw him go straight to a beggar by the roadside.

"Well, here you are. I bought this with my last pocket money. " The little boy said. The beggar opened his sleepy eyes. "For me? Thank you so much. " As he spoke, he slowly picked up the cake with trembling hands. But he gave the cake to the children around him. The child wolfed down his food at once. "This is my son," said the beggar. "He hasn't eaten for a long time. Thanks to your cake this time. " The little boy touched the beggar's head and said, "Nothing. Everyone should help each other. " Just then, he ran home and gradually disappeared in the busy street.

Although this is a very common thing, my heart was deeply shocked by the little boy's behavior. I was several years older than that little boy, but I didn't pay attention to the hungry beggars on the roadside. Although the little boy is not as knowledgeable as I am, he knows the most important truth in life. As a big sister, I also want to learn from him.

I am for everyone and everyone is for me; Give someone a rose, leave a lingering fragrance in your hand. There is no distinction between dignity and humility in the friendship between people, which I will never forget in my life.

8. (An unforgettable composition class) 400 This is something that happened to me. Whenever I see someone giving up their seat on the bus, I will recall it.

This incident not only made me feel ashamed, but also made me admire a complete stranger. One Sunday morning a year ago. After class, I went to my father's office by bus.

As soon as I got on the bus, I quickly grabbed an empty seat and sat down without looking. Then I looked into the carriage, and there were really many people in the carriage. The whole carriage is like a sardine can, side by side, crowded.

I was sitting leisurely, looking at the beautiful scenery outside the window, when an old woman got on the bus. "When I walked to my row of seats, I thought: There are still many stops from my father's unit. How tired it is to be crowded in the crowd after giving up your seat.

Do you want it or not? Just as I hesitated, a young man stood up and said to his grandmother, "Grandma, you can take my seat." Then, he carefully helped the old woman to sit down, and he always leaned back in the seat, holding the handrail with one hand and struggling in the crowded place.

Seeing that grandma had a seat, I didn't think about anything in my heart and continued to enjoy the scenery. After several stops, only the people who came up from the front door did not see the people who went out from the back door, and the carriage became more crowded.

I saw that the young man was squeezed with sweat all over his face, his back gradually bent and he stood very hard. Finally arrived at the terminal, many people got off, and the young man and I were also ready to get off.

Everyone pushed me to the car door. Suddenly, I don't know who hit the young man's leg. The young man "ouch", gritted his teeth and got out of the car with a painful expression, covering his legs.

I feel very strange in my heart: can a bump hurt like this? I walked out of the bus with a "question mark" and saw the young man sitting on the side of the road, rolling up his trouser legs to check the wound. Ah! It turned out to be an injured leg, and the knee was tightly wrapped with gauze. He's hurt! I stood there, stupefied, looking at the red scarf on my chest and feeling warm on my face.

I think: I am a young pioneer. Do I deserve a red scarf? I'm ashamed. Although it has been so long, I still remember it clearly.

This matter has always told me that being a helpful person can only be happier if you help others.

9. Composition: An unforgettable lesson, about 400 words, will do. Write down the score with chalk first, and then we will start singing. That's not true. It was very loud. We came to a big classroom, and we cooperated well. Some places are simpler.

At first, I was in the first grade of primary school. At first, but more importantly, the teacher sang more when "U" began to practice.

In this way, a music lesson that I still remember, I like it in our class very much, and it sings very well, because we not only succeeded, but also said that we would take us to the city for a lesson. In my memory, we practiced several sets of sounds. After the speech, it proved our success, for fear that we could not do it. When the teacher asked us to sing. The song played for a long time before it stopped. We jumped after watching it, then stabilized our emotions and closed our eyes, almost like playing the piano. There was also a playmate when I was a child. I was in Class 6.

That class is my most unforgettable.

On the day of class. In some places. It was a class at that time. Then, with our victory, we quickly learned this song. The students all cheered. The students worked hard, and some of them were lessons I regretted. It floated in the whole classroom, and the music teacher found us again and learned to sing the songs of the Young Pioneers team, so the teacher sang less. As soon as the teacher spoke, everyone seemed intoxicated. There are many unforgettable ones, and some deep ones. As he spoke, he drew the key parts. Therefore. We're ready. It's applause. At that time, we agreed with joy, and then said the key part of the song, followed by a flood of applause, which was twelve spring and autumn years ago. But none of this is my most memorable. Every teacher has classes. The whole classroom listens to songs and dances. We all listen to the teacher's instructions. Some teachers can't even help singing with us. Some practice sweating like a pig and teach singing step by step. We practiced vocalization with the teacher, and then we sang it. The teacher spoke very vividly, so we spoke at the top of our voice. When the teacher wants to sing. Some teachers are still beating their hands, and many, many teachers come to listen and sing. All the teachers present, some practiced little faces turned into red apples. Some teachers are out of breath. With the teacher's music playing, the most unforgettable thing is not one thing. The teacher not only speaks well. It's almost time for class to end. There are things that make me happy. The teacher is playing the piano again. Let's start with "I" and listen carefully to the subtleties. No matter which paragraph you sing, you sing very accurately, so you stop writing immediately, which makes us understand that cooperation is the guarantee of success.

Looking back now, it is more difficult, whether it is a major or a minor.

Later, we learned a new lesson, and we were about to start. Our grades are all first-class, so I feel that there is nothing to be afraid of, and I am not a playmate in my memory, so I buried myself.

10. Please end with an unforgettable class, and write a composition on this topic in one of the teachers' classes. In the galaxy I remember, there is a star that shines particularly, that is, the composition class in grade four.

Recalling this flashing memory, I still giggle from time to time. After the first class that day, Mr. Hu informed us of the composition class of the second class, and he couldn't say anything about the composition. Alas! When did Mr. Hu start playing mystery? I'm so excited that class is finally coming. Today's composition class must be very interesting. I saw a teacher coming to the podium with a big smile on her face and told us to close our eyes. I was too curious to squint, and the teacher didn't notice. At this moment, the teacher came up to me and put a cloth bag on my desk. I'm surprised. Is it about a cloth bag? When I think about it, I want to know what's inside. Finally, the teacher let us use it.

Touch. Smell it and you'll know what's inside. It turns out that the teacher has ulterior motives! So the observation package began.

I feel a round thing, both sides are concave. I think it's football, not football. Is this a fresh orange? A little. It's an apple. Yes, it must be an apple. I am secretly happy. Then I touched it again. I felt something protruding in the middle, flat on both sides and sunken in the middle. I guess two books are stuck together, but ... it's still wrong. This is a kind of fruit. Maybe, I can't help it. This is a kind of fruit. I was happy and disappointed when I opened it. I'm glad that Apple did it right, but I'm not happy for the second time.

The teacher told us to get up and tell the story, and we had to use many idioms. I told the story with embellishment. After that, the teacher smiled and nodded and praised me for speaking well. The teacher praised me as sweet as honey. The teacher also asked us to write quickly, and I wrote a lot. Because of this, the composition has become a memorial of the teacher.