President Li came to our class.

? Since President Li taught a math class in Class Three and Six, the students secretly admired: "President Li has taught in Class Six, so I envy him." "I want President Li to come to our class, too." … I didn't expect President Li, who is striving for perfection, to give a second lecture. Fortunately, I chose Class Three and Seven, and the things that children are longing for will really come true. Happiness came too suddenly, and I was worried that my classmates would be too excited to sleep at night. I only told my classmates that a mysterious guest would come to 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, and every time I replied, President Li always replied with "thank you". Simple two words, President Li used again and again, it is such a modest and sincere principal that I admire and move inexpressibly. Let me realize what I should do when dealing with people.

? President Li sent ppt, lesson plans and videos, and opened the lesson plans for six pages. This is a good class with high efficiency after spending two or three hours watching the first class record, preparing lessons for the second time based on the mastery of the learning situation, deriving the best questions based on the learning purpose, and presupposing various possible situations. From the second lesson preparation, I can see 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 has not 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 study as a front-line teacher?

? There was no class in the second quarter on Friday. The students prepared well before class, waiting for the 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 it was President Li who came to give a lecture. However, after entering the door, President Li sat on the small stool at the end of the lecture and pretended to attend the class. Individual students were like frustrated balloons in an instant. After sitting for a while, President Li got up and walked 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 have been tossed around. This is exactly what the students like about President Li, which gives them unexpected surprises from time to time.

? "Students, 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 and see the prepared RMB, and what new discoveries could be made? 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 time the question is more detailed, so the students will pay attention to the difference between the above figures. Finally, it is concluded that their face values are all composed of the number 1.2.5.

When Wang Xiwen talked about the absence of 3 yuan, President Li naturally asked, "What denominations are there yet?" "There is no 4 yuan, 6 yuan, 7 yuan, 8 yuan and 9 yuan." After the students said that, President Li asked again, "Why are there no numbers like 3.4.6.7.8.9? Wouldn't it be nice to print them all out? How much do you need to get? " President Li asked everyone to take out the blackboard and let the students discuss the formulas that add up to 6.7.8.9 with only 1.2.5. After heated discussion, the representatives of the first group came to the podium to share and came to 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 the other numbers are unimportant numbers. A few 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 from other countries and regions, and told them: "The denominations of currencies in all countries in the world are mainly 1, 2 and 5, because the denomination allocation is to pursue the denominations that can match each other with the least used denominations, 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. 16 yuan, a bottle of soy sauce in the supermarket, gave it to 2 yuan, the cashier in the supermarket. However, the cashier asked Xiao Ming if he could give it to 1 yuan again. Xiao Ming wondered: Is the cashier confused? I have already given it to 2 yuan, so 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 and 5 to bring 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 class, President Li told everyone: There are many math problems in life, and you can learn from paying 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 was over, the students stood up and ran to President Li, talking and laughing, pulling and hugging. If you can't squeeze in front, you can't lose money. I'll start from behind, and my back will do! Just about to walk out of the class gate, I was stopped by twos and threes. Talk about my mood and my harvest ... It is more than a lesson for my classmates, which will affect their life and recall one thing that I am proud of in my childhood. Many students said: President Li taught us that the face value of RMB is composed of 1.2.5, because 1.2.5 can make up any number. President Li has a lot of interactions in class. I like it very much. I feel very relaxed and interesting. I look forward to President Li coming to our class more often. Besides math, there are also Chinese, English, art and drama classes ...

President Li not only gave a lesson to the students, but also gave a lesson to our teachers. After listening, the teachers also have something to say.

Teacher Cui Ruifang:

1. Starting from the reality of students' life, the topic selection is particularly good. RMB is a special commodity that can be seen and touched, and it must be carried out by relying on concrete objects. It is particularly good to learn with real money in class; With the improvement of people's living standards, students' horizons are becoming wider and wider. During the holidays, parents have also seen different currencies in many countries and regions with their trips abroad. 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, equal to 7, equal to 8 and equal to 9. In fact, it is an exercise of reverse thinking. Through different forms of face value combination, students' proficiency in identifying RMB face values is continuously improved, and the importance of 1, 2 and 5 face values is further infiltrated.

3. Expand currency culture and enrich students' cognition. The design of legal tender in each country will have national cultural characteristics. Rmb is no exception, which not only enriches students' understanding of China's history and culture, but also enhances 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 was thinking, in mathematics, like knowing clocks and watches, there are requirements for learning in stages, and why not add an understanding of RMB (II) to the middle and high grades of primary schools? We can talk about "the face value of RMB" in this class, and we can also add the exchange rate conversion of currencies of various countries to broaden students' horizons. At the same time, we 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 feel a sense of urgency after listening. The focus of this class is outstanding; Children have a great 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 mathematics in senior grades in the future.

teacher Li Yu: ① the infiltration of mathematical thoughts.

By observing the face value of RMB, this class 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, they ask, "Why not print all 3, 4, 6, 7, 8 and 9?" Students' answers are also varied, such as "high cost, trouble", etc., and the mathematical thought of "optimization" is infiltrated in this process.

② the generation 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, a classmate asked the question "Because 1, 2 and 5 can be divided", which is actually a RMB exchange problem, which is equivalent to unit conversion. This classroom generation is unexpected, but it is reasonable in terms of the problem itself, which shows that the child has reached a conclusion after thinking. It can be seen that children's thinking angles are diverse.

③ summary of the class.

President Li summed up this lesson with the phrase "You can learn everywhere if you pay attention, and there is mathematics everywhere in your life". Summarize the class with the most popular, familiar or appropriate language, which makes the math class not just a simple math class, but also sublimates some valuable non-knowledge content.

④ Mathematics in life.

This class is a math class in life. By observing the face value of RMB, finding the characteristics of face value, and then exploring the characteristics of face value, students naturally start from real life scenes and feel the mathematics in life, which also provides a supplementary course for our regular math class.

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

① feeling of preparing lessons.

The article of more than 4, words in President Li's first math class was written in one go. I have a lot to say because I saw it all by myself. The lesson plan and courseware were revised several times, and the RMB in class insisted on using real money, just to let the students have real feelings. The real RMB makes children more interested; A 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 be moved by President Li's spirit.

② class feeling.

? This is a math class with 1% students' hands raised. It is like listening to grandpa's story. It is a math class with 1125.6 yuan in real cash ... President Li can recognize more than 8% of the students in the class, especially Han Kaixu's timely encouragement: Newton discovered gravity and Columbus discovered the new continent. Han Kaixu is very happy and more confident. President Li's class is a symbol and spirit, which I witnessed with my own eyes.

③ Comparison of two classes

I remember Ben Youlin said: You should dare to study with yourself! This courage is seen from President Li! Compared with the first class, the class atmosphere in the second class is different, and the arranged class links have also been adjusted. This is the challenge of President Li to his class, and the two classes present different classroom forms. This is the quality that every math teacher should learn.

Director Zhao Jing: The investigation of learning situation before class requires discussion and divergence of thinking to grasp mathematical terms and form mathematical habits; There is a great difference between indoctrination knowledge and exploratory knowledge; We should think from the perspective of students and find out what students like and what classes they like.