A Study On The Teaching Practice Of Model Building Based On Problem Solving ——Chemical Equilibrium As An Example

"The concepts and knowledge related to chemical equilibrium are the cornerstones of the whole high school subject "Equilibrium System",and it is especially important to learn this content well.In this paper,we take "chemical equilibrium" as an example and use problem-solving-based modeling to design lesson plans and practice teaching.Firstly,the specific situation of students' misconceptions was obtained and analyzed;then,the experimental class was taught by using the problem-solving-based model construction,and the control class was taught by the teacher-based lecture mode;finally,through the analysis of post-test results and post-class interviews with students,it was concluded that the problem-solving-based model construction was beneficial to students' learning of chemical equilibrium and could effectively It can effectively reduce the generation of students' mythical concepts and improve students' performance more obviously.This paper is divided into four main chapters.The first part: research literature,study of relevant theories to support this study,identification of the research framework based on the current status of domestic and international research,and definition of "problem solving" and "model building".Part ?: Exploration of the concept of chemical equilibrium myths.The teacher questionnaire and interview method are used to collect the high-frequency error points of students in learning chemical equilibrium and teachers' strategies,and the student questionnaire is used to investigate the mythical concepts and analyze the reasons from the students' perspective.Part ?: Problem solving based modeling practice.Based on the above survey results and the collated mythical concepts,the teaching design and instruction were organized around a task-driven,problem-setting,and model-building approach.By analyzing the performance of the two groups of students in the pre-test and post-test,the problem-solving based model building teaching method was continuously optimized.Part ?: Summarizes the effectiveness of teaching problem-solving-based model building and reflects on the deficiencies in this study.