Effectiveness Of Topic Discussion In Junior High School Geometry Teaching

The junior high school geometry teaching activity is a two-way information exchange system between teachers and students.In which,students are the main body of learning,teachers are the organizers,guides and collaborators of learning.Teachers can effectively pay attention to the thinking process of students in solving geometric problems,which is the key to teaching effect.Based on the theory of think-aloud,this paper explores the explicit display of the thinking process through the students’ “speaking” approach,in order to understand the students’ problem-solving ideas and expose existing problems,so as to adopt effective coping strategies and improve teachers’ teaching and student learning.Firstly,based on the comprehensive analysis of the theory,this paper gives the definition of the connotation of “Problem-Explanation”,and divides the students’ ability to explain the problem into four levels of understanding,connection,expression and reflection.We have compiled corresponding test questions and corresponding according to this level.The problem evaluation form is used to test the students’ questions and analyze the data obtained according to the evaluation form.We find that students are generally in the "knowledge structure","thinking quality","solving ideas and methods" and problems in the "knowledge representation" and other aspects.According to the problems found,we first establish a three-dimensional model of the problem consisting of students,teachers,and teaching environment,and discuss the interaction and unity of each dimension in the model.According to the model,we explored the improvement from the perspective of creating an atmosphere of equality and democracy,encouraging students to explore and cooperate with themselves,guiding students to experience mathematics and experiencing mathematics,paying attention to students’ mathematical expression and mathematical reflection,and paying attention to the hierarchy and lag of teaching,which is the strategy for the validity of the problem.Next,we will follow the effective teaching strategy and the proposed topic.The actual situation of the experimental students has been practiced in terms of improving students’ self-monitoring ability,strengthening students’ self-expression ability and improving knowledge reorganization and transformation ability.