Mathematical online Teaching seminar for Senior One

　　On April 20, Mr. Yu Haijun taught a wonderful and profound online teaching seminar on high school mathematics.

　　In this class, on the basis of reviewing and consolidating the basic operations of vectors, Mr. Yu introduced a new class from the median line that students are familiar with to stimulate students' interest in learning, and used the vector method to solve the problem of proving the median line of a triangle, giving students a preliminary experience To the role of vectors in plane geometry, we will further explore the relationship between the length of the diagonal of a parallelogram and the length of adjacent sides. Taking the rectangle as a special case, we will break through difficulties from special to general, design gradients, and advance layer by layer.

　　Teacher Yu is proficient in applying multimedia technology, using geometric drawing boards, writing boards and other modern teaching techniques to visually and vividly demonstrate that vectors can not only reflect the intuitive positional characteristics of "shape", but also have good operational properties of "numbers", so that students can feel the number The huge role played by the combination of form and form in solving problems subtly improves students' academic literacy, cultivates students' ability to abstract and generalize, reason and reason, solve problems, intuitive imagination and mathematical modeling ability, and implement the new textbook "Lide" The fundamental mission of the tree man. Teacher Yu gave full play to the leading role of teachers and frequently interacted and communicated with students online, demonstrating the dominant position of students. In terms of homework evaluation, Mr. Yu showed the advantages of online teaching, used charts to count students' homework, commented on different methods, and put forward personalized learning suggestions.

　　After the lecture, the high school mathematics teacher of Changchun Foreign Language School and the high school mathematics teaching and researcher of Jilin Provincial Institute of Education, Mr. Bai Jinxiang, commented and discussed the lesson. Director Yin Lu of the high school mathematics teaching and research section quoted a passage from Polya to evaluate the lesson. : "Not only knowledge, but also intelligence and way of thinking must be given to students." She said that this class fully reflects the leading role of teachers, not only teaching knowledge, but also teaching methods.

　　The teachers in the group expressed their opinions from the aspects of teaching methods and cultivating students' core literacy. Teacher Li Ningbo believes that Teacher Yu interacts with students very fully in the classroom. Using data to count homework and track learning situation, he can teach in a targeted manner. Teacher Chen Yan commented on the questions at the beginning of this class, and the questions at the end, echoing before and after, clarifying the teaching focus of this class. She believes that the ingenious setting of teaching links in this class is conducive to cultivating students' core literacy of logical reasoning and mathematical operations, and is an in-depth class. Teacher Wang Xianshi talked about the significance of this class from the perspective of senior three teaching. Because vectors have rich geometric meanings, they can help us solve many problems, not only in plane geometry, but also on blackboards where the teachers and teachers are emotional, which arouses the thinking of all mathematics teachers on daily teaching.

　　Mr. Bai Xiang, a high school mathematics teaching and researcher at Jilin Provincial Institute of Education, recalled that he participated in the online seminar of Changchun Foreign Language School in 2020, which coincided with the teaching given by Mr. Yu Haijun. Mr. Bai could not help but sigh at the rapid growth of young teachers of Changchun Foreign Language School. Mr. Bai commented that this class fully reflected the new curriculum concept. He praised Mr. Yu for carefully designing teaching activities, focusing on students' participation, and achieving good teaching results. Finally, Mr. Bai talked about the "three new" background. Teachers should design efficient teaching activities, pay attention to students' participation, track students' learning, carry out online teaching more effectively, and fundamentally implement the teaching task of "cultivating morality and cultivating people".