On the afternoon of December 21, the students of Xulin studio of Chengdu Shuangliu real elementary education group came to Shuangliu real elementary school, We walked into the classroom of Mr. Yang Dajun and the children of class 4 grade 7 and enjoyed the wonderful scenery of "self-study before class - classroom doubt interpretation - in-depth generation". The children's strong learning enthusiasm in the classroom made the teachers feel like a spring breeze and warm into their hearts.
At the beginning of the class, Mr. Yang started with the "temperature" of the last class again, asked the children to broadcast today's Shuangliu temperature, feel the cold of winter, and review the two quantities with opposite meanings of above zero temperature and below zero temperature with positive and negative numbers. Then, let the children communicate independently and the whole class report a group of quantities collected by self-study before class, which have the opposite meaning. The students report colorful. The students not only reported that the amount from the housing on the ground floor to the parking lot on the ground floor, from the salary income on the bank passbook to the expenses, the profits and losses from the business of the store, and the scores and deductions in the knowledge competition are all in the opposite sense, but also reported the standard weight of 10-year-old children, listed that overweight and thin are also a group of opposite quantities, and the average score of mathematics in the class, Higher than average score and lower than average score are also opposite quantities. Higher than per capita income and lower than per capita income in Chengdu are both opposite quantities. How can these quantities with opposite meanings be expressed? It causes students' cognitive conflict. Students can't express it with the natural numbers they learned before, but with the experience of expressing temperature in the last class, students naturally know that they should add "+" or "-" in front of the numbers respectively. Positive numbers and negative numbers jump onto the paper, and students realize the necessity of negative numbers. In this way, mathematics comes from life and is used in life.
After class, Xu Lin, a tutor, led us to discuss the new teaching mode of this class and Yang Da Jun's teacher. We have all affirmed Yang's investigation before class, and make full use of the real situation of life in which students use the positive and negative numbers to express the opposite meaning, so that students can learn mathematics in life. This really greatly mobilized the students' enthusiasm and initiative to participate, so as to make the boring and abstract mathematics classroom lively and interesting, and make the classroom more effective. Mr. Xu Lin put forward his own views on how to do a good job in pre class presupposition and achieve an efficient classroom. The mathematics classroom is driven by problems to promote the continuous development of students' thinking, and can not stay at the surface problems. What really promotes the development of students' thinking is the deep problems, or the core problems. The core problems come from: first, based on the teaching materials, teachers deeply interpret the teaching materials and interpret the key and difficult problems of each class; Second, based on students, teachers set up problems at students' thinking confusion and knowledge growth points according to students' learning needs. In the classroom, dialogue, questioning, discussion and discrimination between teachers, students and students, continuous friction and collision of thinking, continuous expansion and deepening of knowledge, so that students can be self-sufficient in the exploration of knowledge and form mathematical literacy.
Indeed, as Mr. Xu Lin said, in order to make a mathematics classroom real, effective and efficient, careful pre-school presupposition is the key. Understanding the key and difficult problems of textbook presupposition and designing effective problems according to learning situation are two fundamental ways. On the road of education and teaching research, students have embarked on a new journey.
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2024年9月27日 星期五