Analysis And Comparison Of The Contents Of "Element Compounds" In Three Editions Of Chemistry Textbooks

In 2017,the "General High School Chemistry Curriculum Standards" was promulgated,and high school chemistry textbooks compiled in accordance with the new curriculum standards were also published in 2019.There are currently three versions of high school chemistry textbooks(Personal Education Edition,Luke Edition,and Suzhou Education Edition)have been promoted nationwide.Elemental compounds are an important content of high school chemistry learning.This research mainly compares and analyzes the relevant content of the "elemental compounds" in the current three versions of high school chemistry textbooks from content selection,organization and layout,and content presentation,so as to summarize the characteristics of the content of the "elemental compounds" in each version of the textbook for teachers.To provide reference for the teaching of elemental compounds and the revision and compilation of later textbooks.The comparative analysis on the selection of elemental compound knowledge content in the three editions of textbooks includes three aspects,the consistency analysis of the textbook and the course standard content,the comparative analysis of the experimental content,and the comparative analysis of the exercise content.Among them,the consistency analysis of the content of the textbook and the curriculum standard includes two aspects: one is the qualitative analysis of the correspondence between the three versions of the textbook and the knowledge points of the curriculum standard;the second is based on the SEC model of the new "Curriculum Standards" and the three versions of the textbook "elements" The contents of the "Compounds" section are analyzed for consistency and quantitative analysis.The study found that the knowledge of the three editions of textbooks is more consistent with the curriculum standards,and they all choose materials that are more closely related to society and life.Among them,the People's Education Edition has the most comprehensive coverage of knowledge;Su The teaching version and the Luke version have their own emphasis.Based on the analysis of the "Curriculum Standards" and the "Elemental Compounds" section of the textbooks of different editions based on the SEC model,it is found that the consistency coefficient of the Luke version is relatively high,but the consistency coefficients of the textbooks of each version are low,and none of them reaches the consistency coefficient.The critical value(0.79),the analysis shows that the level requirements of the teaching materials are generally higher than the curriculum standards.In terms of the choice of experimental content,the overall experimental content of the three versions of the textbook is relatively substantial,but the experimental categories are relatively single,basically all of which are property inspection tests,rarely involve the preparation of substances,and do not set up quantitative analysis and separation and purification experiments.Type: The comprehensiveness of the experimental setting of the textbook of the People's Education Edition is relatively good.In the choice of exercise content,the three versions of textbooks have various types of exercises,which are conducive to cultivating students' comprehensive ability;the three versions of textbooks have significant consistency with the curriculum standards in the difficulty of exercises;among them,the PEP version is in exercises.The setting of the corresponding knowledge points is the most complete.The comparative analysis of the organization method of the element compound content of the textbook includes the overall organization and arrangement of the element compound content in the textbook and the internal organization and arrangement of the specific element compound content.From an overall point of view,the knowledge of "elemental compounds" and the knowledge of concepts and principles in the three editions of textbooks are all interspersed and arranged,which is conducive to students' understanding and mastery of the knowledge of "elemental compounds".However,in comparison,the Luke version ' s arrangement of elemental compound knowledge is “ centralized ”,while the People ' s Education version and the Jiangsu Education version are relatively “ decentralized ”;in addition,the Luke version is more based on "methods-procedures" and The idea of "Nature-Transformation";The People's Education Edition focuses on subject knowledge,and emphasizes the "classification" idea and the logical sequence of knowledge itself;The Soviet Education Edition focuses on society and makes choices more based on social life And organization.In terms of concept construction,the Luke version is more prominent,emphasizing the "element view" and "transformation view",and the People's Education version emphasizes the "classification view".The comparative analysis of the presentation methods of the three editions of the textbooks on the content of element compounds includes two aspects: column design and picture design.The study found that: the types of textbooks in the three editions are mostly focused on activities and materials,which is conducive to improving students' scientific inquiry ability and broadening students' horizons;the types of pictures are mostly concentrated in experimental and STS categories.The numbers are basically the same.However,the number of textbooks in different editions is quite different.The People's Education Edition and the Suzhou Education Edition are significantly more than the Luke edition.Finally,according to the characteristics and differences of the relevant content of the different versions of the textbook "element compound",the research puts forward suggestions for textbook compilation and teaching.