I don't know what you mean. The idea of the new curriculum reform is to let students experience the whole process of mathematics learning, experience the formation of mathematics knowledge, discover and explore the origin and process of mathematics knowledge, and realize students' self-development, sustainable development and happy life. As a teacher, I always pay attention to students' activities, preferences and their growth in the teaching process. After a math class, a student rushed up to me and said, "Teacher, I have a riddle. Can you guess?" I said, "Good!" The student said, "Seven ups and eight downs. Guess a number. " I thought for a moment and said, "It should be 7/8!" The students left happily. Seeing the students happy, I think it will be very interesting if we can get everyone moving and find relevant math riddles for everyone to guess. So, mobilize all students to collect. Some students collected some. For example: 125678, guess an idiom. 5432 1, guess a mathematical term (reciprocal). 1+7= eight, guess a word (product) and so on. The students are really happy to guess. I also strike while the iron is hot, and encourage everyone to look up some information about riddles and see the relevant knowledge of riddles. Can you make up some riddles yourself? Students' interest is higher, they are all moving and making up a lot. For example, the road that does not turn to the bay. Type a math noun (straight line). Cowherd and Weaver Girl. Type mathematical symbols (division symbols) and so on. Encourage students to collect and make their own mathematical riddles to guess in class, and build a platform for students of different levels to learn and show themselves. So I came up with the idea of selecting "mathematical riddle experts", which can not only cultivate special students, but also stimulate students' interest in learning mathematics. Through thinking and practice, the selection scheme was formed. The following is the selection scheme of "riddle expert" in mathematics: 1. Purpose and significance of the activity: according to the spirit of curriculum reform, enlarge the mathematics classroom, expand students' extracurricular study, stimulate students' interest in learning and broaden their horizons. Let students learn in their favorite activities and grow up in happy learning. Second, the student presentation process: 1, students submit application materials about riddles (① related riddle knowledge. ② Mathematical riddles collected. (2) Show your expertise in this field (1) and show related riddle knowledge; ② Show some collected mathematical riddles for students to guess. 3. Show your understanding of mathematical riddles: how to understand the collected riddles. 4. Show the riddles designed by yourself and let the students guess. Iii. Selection method and requirements: 1, and the selection method is as follows: the project content scores the riddle knowledge related to data collection (30 points), the mathematical riddle (20 points), the ability to guess riddles (20 points) and the ability to design riddles (30 points), with a total score of 2. Requirements: Students can guess and imagine their riddles to protect their interests. 3. Those who scored 90- 100 were "first-class experts", those who scored 70-90 were "second-class experts" and those who scored 50-70 were "third-class experts". Those who are not selected can continue to work hard. After the scheme came out, I guided some students who were particularly interested to collect and learn about riddles and related mathematical riddles. Learn to make up math riddles, and make math terms and concepts in textbooks into riddles for the whole class to guess. Through such activities, students not only improve their interest in learning mathematics, but also help to understand and master mathematical knowledge. In this way, the "riddle expert" scheme naturally came into being. Through guidance, the students really took a lot of brains to show their achievements. Riddles are also classified and displayed. The "riddle expert" shows the information. The method of guessing riddles can be summarized as: 1. Word meaning analysis: the rising sun rises (make a number) 9. You expect me to come, and I expect you to come. (type a mathematical noun) equals 1: 1 (type an idiom) evenly matched. Two cows were fighting (with a mathematical noun). See you diagonally across the street, mom! (Type a mathematical noun) Denominator 2. Know how to choose spelling: sell (type one) half, half and the other half at half price (type a common word). Friends are combined into one (type one). Miscellaneous (type a five-character proverb) Close to ten (decomposition method). Write two words (type a plant name). Bamboo 3. Operation combination method: 10,000 pieces of paper (type one) (noun) time 3. What can hold the world map (enter a project name) 4. Four brothers are the same age, seven big brothers and four second brothers have the same birthday. 1 small. Who do you think this big family is? (Type the project name) Calendar 5. Cowherd and Weaver Girl (with a mathematical symbol) Divide by 6. The head of state acts as an accountant (a mathematical term) statistics 7. Make a clean break (a mathematical noun) score.