President Li came to our class.

? Since President Li taught a math class in Class Three and Six, the students have secretly admired him: "President Li has taught in Class Six, and I really envy him." "I want President Li to come to our class, too. "... I didn't expect President Li to teach for the second time. Fortunately, I chose Class Three and Class Seven, and what the children longed for will really come true. Happiness comes so suddenly that I'm worried that my classmates will be too excited to sleep at night. I only told my classmates that there would be a mysterious guest in our math class on Friday. Although the students don't know who it is, they are looking forward to this day coming soon.

? President Li sent me a letter about the class. Every time I reply, President Li always says "thank you". The simple word, President Li has used it again and again. It is such a modest and sincere principal that I admire and move beyond words. Let me realize what I should do when I am in contact with people.

? President Li sent ppt, lesson plans and videos, and opened the lesson plans for six pages. It takes two or three hours to read the record of the first class, prepare lessons for the second time according to the mastery of the learning situation, deduce the best questions according to the learning purpose, and presuppose various possible situations. This is a good class with high efficiency. From the second lesson preparation, I saw President Li's sense of responsibility and feelings of being meticulous and striving for perfection. Isn't he explaining a seriousness and a specialty to our front-line teachers? (Although a Chinese teacher who hasn't taught for many years) Isn't this the craftsman spirit? Do things differently, pay attention to quality and sometimes need a little stubbornness. Isn't this what I should learn as a front-line teacher?

? There is no class in the second period on Friday. The students made full preparations before class, waiting for this mysterious big coffee to come to our class. At this moment, President Li came in from the back door with a notebook and a pen. When he saw the smiling faces of the students, he should have guessed that President Li was coming to give a lecture. However, after entering the door, President Li sat on the stool at the end of the lecture and pretended to listen. Individual students are like deflated balloons in an instant. After sitting for a while, President Li got up and went to the podium and asked the students, "Do you know who the mysterious guest is today?" "I don't know," the students replied in unison. Principal Li, are you naughty? The students' little hearts were tossed around. This is exactly what students like about President Li, giving them unexpected surprises from time to time.

? "Classmates, there are mysterious guests coming to class today. What does mystery mean? " With this question, this class officially began. President Li asked the students to touch the prepared RMB. What can they find? The students' answers are all preset by President Li. President Li threw out the second question: "Students, what is the difference in the face value of RMB?" This question is more detailed, so students will pay attention to the differences between the above figures. Finally, it is concluded that their face values are all composed of the number 1.2.5.

When it was said that there was no RMB in 3 yuan, President Li naturally asked, "Do you have any denominations?" "There are no 4 yuan, 6 yuan, 7 yuan, 8 yuan and 9 yuan." After the students finished speaking, President Li asked, "Why is there no such figure as 3.4.6.7.8.9? Wouldn't it be nice to print them all out? How much do you need? " President Li asked everyone to take out the blackboard and let the students discuss the formula that 6.7.8.9 only adds up to 1.2.5. After a heated discussion, the representatives of the first group came to the stage to share, and reached the conclusion that 1.2.5 can form any other number, which pushed this class to a climax.

President Li also told the students that among the numbers 1-9, there are important numbers and unimportant numbers. 1, 2 and 5 are important numbers, and other numbers are not important. Several important numbers can be combined with the least number of times to get unimportant numbers. President Li also asked the students to appreciate the denominations of currencies in other countries and regions, and told them: "The denominations of currencies in the world are mainly 1, 2 and 5, because the denomination allocation of currencies is to pursue denominations that can be matched with each other with the least denomination, and the numbers 1, 2 and 5 meet this requirement." Finally, I showed my classmates a life problem. Math diary: On Sunday, my mother was cooking and suddenly found that there was no soy sauce. My mother asked Xiaoming to buy soy sauce. A bottle of soy sauce in the supermarket 16 yuan, Xiao Ming gave it to 20 yuan, the cashier in the supermarket. However, the cashier asked Xiao Ming if he could give 1 yuan. Xiao Ming wondered: Did the cashier make a mistake? I have already given it to 20 yuan. Why do I need 1 yuan? Students, do you think the cashier is confused? Why? The students successfully cracked the answer, and President Li summed up the numbers 1, 2, 5, which brought convenience to our lives. Let students really feel the practicality and interest of mathematics.

? This class is coming to an end. After summing up this lesson, President Li told everyone that there are many math problems in life, and you can learn them if you pay attention to them everywhere, and math is around you. President Li wants students to learn mathematics in life and use mathematics in life. Mathematics is inseparable from life.

? After class, the students stood up and ran to President Li, talking and laughing, pulling and hugging. You can't lose money if you can't get ahead. I'll start from the back, and my back will do! I was about to walk out of the class gate when I was stopped by twos and threes. Talk about my mood and gains ... For my classmates, this is not just a lesson, it will affect their lives and recall something I was proud of when I was a child. Many students said: President Li taught us that the face value of RMB is made up of 1.2.5, because 1.2.5 can make up any number. President Li has a lot of interaction in class. I like it very much. I find it very relaxing and interesting. I look forward to President Li coming to our class more often. Besides math, there are Chinese, English, art and drama classes. ...

President Li not only taught the students a lesson, but also taught our teacher a lesson. Teachers also have something to say after listening.

Teacher Cui Ruifang:

1. From the reality of students' life, the topic is particularly good. Rmb is a special commodity that can be seen and touched, and it must be carried out by concrete objects. Learning with real money in class is particularly good; With the improvement of people's living standards, students' horizons are becoming wider and wider. During the holidays, parents also saw different currencies of many countries and regions with their overseas travel. This lesson is very enlightening to carry out effective teaching activities according to the actual needs of students.

2. Group cooperative learning provides students with sufficient opportunities to participate in activities, such as learning tasks equal to 6, 7, 8 and 9. In fact, this is an exercise in reverse thinking. Through different forms of face value combination, students' proficiency in recognizing the face value of RMB is continuously improved, and the importance of 1, 2, and 5 face values is further penetrated.

3. Expand monetary culture and enrich students' cognition. The design of legal tender in each country will have its own cultural characteristics. Rmb is no exception. It not only enriches students' understanding of China's history and culture, but also strengthens their love for RMB and permeates patriotic education.

4. Thinking: With the improvement of the current economic level, these are far from meeting the needs of students. I am thinking that mathematics, like knowing clocks and watches, needs to be studied in stages. Why not increase our understanding of RMB (II) in the middle and senior grades of primary schools? We can talk about "the face value of RMB" in this course, and we can also add the exchange rate conversion of currencies of various countries to broaden students' horizons. At the same time, it can also solve the problems in life and truly integrate real life into the classroom.

Miss Chen Jiaojiao: As a math teacher who has been teaching for more than ten years, I have a sense of urgency after listening. The focus of this class is outstanding; Children have a sense of accomplishment; Dig deep into the root of the problem, why? Diversification of problem solving, divergent thinking and multiple solutions to one problem will pave the way for studying senior mathematics in the future.

Teacher Li Yu: ① The infiltration of mathematical thought.

By observing the face value of RMB, this lesson leads students to find that the face value of RMB is related to arrays 1, 2 and 5, and explores that 1, 2 and 5 can be combined to get any face value we want. After leaving school, we will ask, "Why not print out 3, 4, 6, 7, 8 and 9?" Students' answers are also varied, such as "high cost and trouble". And the mathematical thought of "optimization" permeates this process.

② The emergence of classroom problems.

When President Li was guiding students to think about why the face value of RMB is related to the numbers 1, 2 and 5, some students raised the question "Because 1, 2 and 5 are divisible", which is actually a RMB exchange problem, equivalent to unit conversion. This kind of classroom generation is unexpected, but it is reasonable in terms of the problem itself, which shows that the children have come to a conclusion after thinking. It can be seen that children's thinking angles are diverse.

③ Class summary.

President Li summed up the lesson with "As long as you concentrate, you can learn things everywhere, and there is mathematics everywhere in your life". Summarizing the classroom with the most popular, familiar or appropriate language makes the math class not only a simple math class, but also sublimates some valuable non-knowledge content.

④ Mathematics in life.

This class is a math class in life. Students can observe the face value of RMB, find the characteristics of face value, and then explore the characteristics of face value Naturally, they can start with real life scenes and feel the mathematics in life, which also provides a supplementary course for our regular mathematics class.

Miss Zhang Shanshan: Although President Li is not a math teacher and hasn't given lectures for many years, I have learned a lot from President Li's two classes.

① feeling of preparing lessons.

"President Li's first math class" is an article with more than 4,000 words in one go. I have a lot to say, because I saw it all with my own eyes. The teaching plan and courseware have been revised several times, and the RMB in the classroom insists on using real money and silver, just to let students have a real feeling. The real RMB makes children more interested; The math class is too challenging for President Li, but he has been working hard. After reading "President Li's first math class", Mr. Zhu Lin said: I cried, so I must have been moved by President Li's spirit.

2 class feelings.

? This is a math class with a raise rate of 100%. It's like listening to grandpa's story. This is a math class, with 1 125.6 yuan in cash ... The headmaster commended more than 80% of the students in the class, especially Han Dui's timely encouragement: Newton discovered gravity and Columbus discovered the new continent. Han is very happy and more confident. President Li's class is a symbol and spirit, which I witnessed with my own eyes.

③ Comparison between two classes.

I remember Ben Lin You said: Dare to study with yourself! This kind of courage can be seen from President Li! Compared with the first class, the classroom atmosphere of the second class is different, and the arranged classroom links are also adjusted. This is President Li's challenge to his class, and the two classes present different classroom forms. This is a quality that every math teacher should learn.

Director Zhao Jing: Before class, we need to discuss and divergent thinking, master mathematical terms and develop mathematical habits; There is a great difference between indoctrination knowledge and exploratory knowledge; We should think from the students' point of view and know what students like and what classes they like.