Teaching Practice On Training The Ability Of Model Construction For Junior School Students By Using The Primitive Physics Problems

Core literacy is competence-oriented,which intends to make students gradually form correct values,necessary character and key abilities through subject learning and promote the all-round development of students,which puts forward new requirements for physics teaching.The ability of model construction is the main content of scientific thinking in core literacy,which is the difficult point of high school physics teaching and the blind area of junior high school physics teaching.At the same time,in order to improve the tendency of "emphasizing knowledge but neglecting ability" brought by the "sea-questioning tactics",physics teaching should be returned to its origin,and primitive physics problems emerge as the times require.Therefore,this paper uses primitive physics problems to carry out teaching,in order to cultivate the model construction consciousness and ability of junior high school students.The research is mainly composed of five parts :The first part is the preparation before the study,Corresponding to the first chapter of the paper.It mainly explains the background of the study and the current status of domestic and international research,and summarizes the literature related to the topic of this study.In this way,the content and methodology of the study are determined,and the purpose and the significance of the study are clarified.The second part is the theoretical research part,Corresponding to the second and third chapters of the paper.Based on the literature research,Chapter 2 clarifies the theoretical basis of this study and elaborates the guiding value of each theory for this study.Chapter 3 first theoretically discusses the two core concepts of primitive physics problems and the model construction respectively,and secondly clarifies the connection between primitive physics problems solving and physics model construction through a comparative analysis of the primitive physics problem solving process and the model construction thinking process to provide theoretical support for the practical study.The third part is the practical study of the present situation analysis,corresponding to the fourth chapter of the paper.Firstly,the specific scheme and ideas of the practical study were determined.Secondly,a collection of electrical primitive physics problems in junior high school was collected and compiled,from which some quantitative problems were selected to form the pre-test and post-test volumes,and the scoring criteria were formulated;at the same time,a post-test questionnaire was prepared.Finally,data analysis was done on the results of the pre-test paper and the questionnaire results to summarize the current situation of students' modeling ability.The fourth part is a presentation of teaching strategies and teaching cases,corresponding to the fifth chapter of the paper.In terms of the selection of primitive physics problems,the "qualitative-semi-quantitative-quantitative" guiding model of primitive physics problem is proposed;in terms of the launch timing of primitive physics problems,specific strategies are proposed to integrate the original physical problems into the classroom introduction,scientific inquiry and review.finally,heuristic classroom teaching ideas are proposed and applied in the teaching design and specific primitive physics problem solving.The fifth part is the test of teaching effectiveness,corresponding to the sixth chapter of the paper.Through data analysis of the results of each representation in the post-test paper and the results of the questionnaire,it was found that the abstract representation,assignment representation,physical representation,and method representation abilities of the students in the experimental class have been significantly improved,and the corresponding thinking barriers have been effectively broken through,and the reasons why the image representation and mathematical representation abilities have not been significantly improved were analyzed.Then,through linear regression analysis,the direct influence of the overall performance of modeling ability on the overall performance of using modeling ability was verified.Finally,the teaching effect of the teaching strategy on students at different levels was tested by analyzing the differences between the post-test scores of students in the high,middle and low scoring classes of the experimental and control classes.The sixth part is a summary of the study,corresponding to Chapter 7 of the paper.Based on the analysis of the post-test results,it is concluded that primitive physics problems can cultivate students' positive learning emotions,and the use of primitive physics problems can effectively cultivate the model construction ability of junior high school students,and the teaching effect of different levels of students is different.Finally,the reflections and perspectives of the study are provided.