Analysis And Research On Senior High School Physics Textbooks Based On ISM Method

Since 2017,China's Ministry of Education issued the physics curriculum standard for senior high school(2017 Edition),the physics curriculum reform of senior high school has begun a new chapter.As the carrier of educational reform and practical teaching activities,teaching materials are the bridge between teachers and students.The logic of physics knowledge is very strong.Different textbook analysis methods are used to analyze the same knowledge.Due to different emphases,the results are different,and the use time of the new textbook in front-line teaching is short.Therefore,if teachers want to give full play to the effectiveness of the new textbook,the analysis and interpretation of the textbook is particularly important.In order to help teachers understand the electrostatic field knowledge system of the new textbook more intuitively,so as to choose the appropriate teaching order according to the actual situation,this paper introduces the interpretive structure model method,that is,ISM method,to analyze the knowledge structure system of the textbook.This paper focuses on two problems:(1)reduce the influence of subjectivity in the selection of core elements of ISM method and the determination of their relationship,so as to draw an objective hierarchical directed graph,so that teachers can clearly grasp the hierarchical structure relationship of electrostatic field knowledge content;(2)This paper explores the unique advantages and disadvantages of ISM method in analyzing teaching materials,and gives some suggestions on the application of ISM method in analyzing teaching materials.Firstly,through interviews with 17 front-line teachers and 30 theoretical workers,this study tries to make the selection of elements and the determination of the relationship between them more objective.After interview,discussion,re interview and revision,the core elements selected by front-line teachers and theoretical workers and the formation relationship between them are obtained respectively.Then,according to the similarities and differences between the two groups of data,combined with the knowledge structure diagram and the analysis of electrostatic field knowledge by other scholars,the core elements of electrostatic field knowledge and the relationship between them are determined after repeated discussion.After forming a two-way table,transforming the adjacency matrix and calculating the reachability matrix with matlab,the hierarchical directed graph of electrostatic field knowledge is obtained.Finally,the hierarchical directed graph based on ISM method is compared with the arrangement order of knowledge points in the new textbook to provide help for teachers to adjust the teaching order;Compare and analyze with other teaching material analysis methods,clarify the advantages and disadvantages of ISM method,and give suggestions for the practical application of ISM method to analyze teaching materials.The research shows that:(1)the optimization measures can reduce the influence of subjective factors of ISM method and make the analysis results more objective;(2)The directed graph of electrostatic field knowledge level drawn by ISM method shows that teachers can teach directly according to the compilation sequence of new teaching materials,but they need to supplement knowledge points or summarize knowledge points in some chapters;(3)Teachers should use ism method to analyze textbooks according to their own ability and the purpose of textbook analysis.At the end of the paper,the shortcomings of the research and the follow-up research of ISM method are described.