Math diary, this term has been bothering me. I know this diary, but what does it have to do with the word math? What role does it play? What's different from the usual diary? However, an accidental class opportunity made me realize its role. ; Once when I was talking about the surface area of a cuboid, my classmates told me that the surface area of a cuboid refers to the total area of six rectangular faces. But when I asked students to try to calculate the surface area of a cuboid by themselves, I found that many students didn't think at all, but waited for a good student or teacher to tell me that I was angry, but as a new teacher, I controlled myself. I realized that this problem is not that knowledge is difficult, nor that I didn't speak well, but that students' internal factors didn't work. Even if I criticize the whole class, the effect is not good. How can students know that the key to learning mathematics lies in "thinking"? Suddenly the word "thinking" appeared in my mind. What a good word! ; Facing the students, I wrote a big "Si" on the right side of the blackboard and asked the students, "What is this word?" As a fifth-grade student, they certainly know this word, but they are puzzled by its use in math class. Then I asked, "What is the structure of this word? What's the message? " Some students quickly said: "Up and down structure, field heart." "good!" I said, "Then who knows what a field is?" "Land where food can be planted" and "paddy fields in the south" ... The students said a lot, "So the fields are naturally formed?" "No, only farmers can farm." Some students replied: "Well, is the farmer's uncle hard?" I then asked. The students nodded. "So, please look at the word" heart "under the field. These two words can be understood in this way when put together. To farm with your heart, you must think with your heart, think with your heart, and farm with your heart in the land of knowledge. Only in this way can we bear fruitful fruits. " This is the students' understanding of the teacher's intention. ; Seeing the students' expressions, I believe the students were deeply touched at that time, and the following teaching went smoothly. After class, I wanted to make this class more meaningful, so I arranged a composition to talk about my experience in math class today, and of course I limited the number of words, otherwise these little guys would just write me a few words to deal with it. ; When I received it the next day, I found that my classmates had written this article very seriously. Some students talked about their future study. What moved me was that many students talked about the mistakes they made in their studies. For example, a student didn't ask his parents to sign the exam, but found someone else to sign it, which now feels very wrong; Another classmate who usually studies well told me that in order to make her homework excellent, she often compares questions with others. Of course, my composition classmates also asked me some math problems and many suggestions. ; After reading one article after another, I suddenly realized that this is a very good math diary. This composition makes me know my students better. Of course, my improvement in teaching has also made students see my respect for them and narrowed the distance between us. This little attempt made me realize the role of math diary. Sometimes, many students don't have the opportunity to ask questions for many reasons, so math diary can help us communicate and let us know what students think. (Source: Wu Yonghao, Putian Primary School, Dayong Town); ; On Wednesday, February 23rd, it was cloudy today. After I went to school to sign up and went home, I wrapped the book cover and began to calculate the cost of this semester. The first is tuition. Tuition fee is 4 10 yuan, plus drinking water fee in 20 yuan, 430 yuan. Next, the charge of the Olympic Mathematics School is 180 yuan. It is estimated that the bus fare is in 20 yuan and ***200 yuan. There is also money to buy exercise books: 2 copies of "Classpass" 2 1.5 yuan; English practice 1 9.9 yuan; 2 copies of Examination Paper Course Pass 15.9 yuan; "Jiangsu Big Test Paper" 3 copies 2 1 yuan. 21.5+9.9+15.9+13+21= 81.3 (yuan). Study fee: 430+200+81.3 = 711.3 (Yuan). Living expenses: I will drink about 5 cases of milk this semester, 5×30= 150 yuan. Every meal is about 2~3 yuan, of which 2.5 yuan is 2.5×3×30×5= 1 125 (yuan). "What else?" I bit my pencil and said to myself, "and your school supplies." Hey, mom's home. Yes, and school supplies. School supplies: a pencil-box 8 yuan, a pencil-box 3 yuan (very cheap, clearance goods), six pencils 3 yuan, an eraser 0.5 yuan, two triangular rulers 1 yuan, two mechanical pencil 5 yuan, 8+3+0.5+ 1+5=20.5 (yuan). Total expenditure: 711.3+150+1125+20.5 = 2006.8 (yuan). Wow, I didn't expect that I, who usually don't spend much money, would let my parents spend 2006.8 yuan this semester. It seems that I will save money! Saturday, September 3, 2005 Weather: Cloudy Day He Jiahong Our new math teacher had a golden September, and the new semester began. I was lucky to meet a new math teacher-Zheng Yang. When you hear this name, don't think it's a man. In fact, she is a female teacher. Tall, with big eyes, he looks like a middle school student. The first lesson she gave was: multiplication and division. She not only drew pictures when analyzing math problems, but also quoted examples from life over and over again until we fully understood and nodded to her. Teacher Yang taught me so well that the first class left me with endless memories. Saturday, September 17, 2005 Weather: Rainy When He Jiahong is in class, why do we like to talk? Yesterday, Teacher Yang asked us to discuss why some students like to talk. I don't think the reason for this kind of thing is unique. I remember one time when I was a foreign teacher, a classmate sitting next to me didn't like English class and couldn't understand what the American teacher said. So he talked to me secretly. I "discussed" with him because I couldn't stand the temptation of his Disney topic. Later, it was criticized by the teacher. I think: Talking in class will not only affect your own study, but also affect others' study. We must get rid of these bad habits. Weather on Sunday, September 25th, 2005: It's raining. He Jiahong said shoes. Today, there is a problem in math homework called a pair of shoes. So I went to my mother and asked for a scale. Mom said she didn't have weighing scale. What's the matter? However, as the saying goes, "Nothing is difficult in the world". I think there must be laws. So, I used my clever brain and came up with: homemade balance. I cut off the paper covers of the empty moon cake box piece by piece, put on transparent tape, folded one of the paper covers into a regular triangle and put it on the table. Another piece of paper is made into the left and right disks of the balance and placed on the triangle in a balanced way. Then find something with weight at home as a weight. For example, my mother bought toothpaste, lipstick and other items, including 120g, 40g, 18g, 3g. I'm very excited to say that the shoe activity has started. I put the shoes on the left side of the homemade balance and the "weight of goods" on the right side. It is best to balance the weight on both sides. Then the sum of the weights is the weight of my shoes. Exactly 86 grams. Hard work pays off! I finally finished my math homework. Mom praised me when she found out. Also jokingly said to me: "In ancient times, there was a clever Cao Chong as an elephant, and in modern times, there is a clever Hung Hung as a shoe!" " "Say that finish, everyone laughed. It turns out that there are scales everywhere in life! Thursday, September 29th, 2005 Weather: Sunny He Jiahong Happy Math Class Yesterday, Teacher Yang told us about "going to the playground". Because this is an interesting project, the students are very active in asking questions. I am no exception. After thinking about it, I raised my hand and asked such a question: "Is 200 yuan enough for 16 people to play three games?" "Teacher Yang praised me for asking extremely difficult questions. However, at the prompt of Teacher Yang, I also helped my classmates to answer the questions. I remember a scientist said, "It is often more difficult to ask a problem than to solve it. "In this math class, we not only raised many questions, but also solved many problems. How amazing we are! Sunday, June 2, 2005 Weather: Sunny He Jiahong I'm fine. Today, we went to Happy Valley. The adult entrance ticket price of Happy Valley is: 140 yuan; Half a ticket for children. While waiting in line to buy tickets, my mother asked me to calculate how many tickets we need to buy. I blurted out, "I want 700 yuan. "My mother was surprised to ask me how to calculate so fast. Actually, I think so: four half-price tickets for children are equal to two adult tickets, plus three adult tickets are exactly five adult tickets, and five tickets for 140 are exactly equal to 700 yuan. Mom praised me for being great! Thursday, June 65438+10/October 65438+March 2005 Weather: How many times does Shenzhou VI circle the earth every day? Today, when the director of Beijing Aerospace Control Center told the reporter interviewed, "Shenzhou VI needs 90 minutes to orbit the earth." After listening to it, I thought, "So how many times can Shenzhou VI circle the earth in one day? So I quickly calculated with my brain: there are 24 hours in a day, 1 hour is 60 minutes, that is, 24 times 60 is a day 1440 minutes. Then divide 1440 minutes by 90, which is equal to 16 laps. Also, Shenzhou VI will explore in space for five days, that is, 80 times around the earth. Astronauts are really amazing! Thursday, June 20, 2005 Weather: Sunny He Jiahong Counting Soybeans Today's math class is a practical activity. We are divided into groups of 8 people. Then the members of each group estimate how many soybeans there are in 1 kg. According to the estimation method introduced in the book, it seems not difficult, but it is necessary to be careful to minimize the error. I originally suggested that our group would use more cups accurately. But I can't find the cup. Later, this group of people chose the method of grasping by hand. Team member Luo Guangyuan is responsible for catching. Oh, dear! Luo Guangyuan's little hands are quite big! One catch is 180 grains, and 30 consecutive catches have just finished 1 kg of soybeans. Finally finished. 30 180 equals 5400 capsules. So I know there are about 5400 1 thousand soybeans. This practical activity inspired me. I might as well try melon seeds, candy and peanuts. In fact, math problems are closely related to life.