A Study On The Connection Of The Teaching Of Core Concepts Of Chemistry Between Junior And Senior High Schools

With the promulgation of the "General Senior High School Chemistry Curriculum Standards"(2017 edition),chemistry teaching pays more attention to the concept of chemistry discipline as the core,the curriculum content is structured,and the concept learning is modeled.In the preparation of textbooks,it is also pointed out that chemistry textbooks should focus on the chemical core.The concept determines the subject matter,and the core concept of chemistry plays an important role in the entire chemistry discipline.Through the questionnaire survey and analysis of the core concept of "redox reaction",as well as the study of junior high school chemistry textbooks and related literature,it is found that there is a poor connection between the core concept teaching of junior high school and high school,and the theoretical and practical research on the connection of the core concept teaching of junior high school Less,the convergence of the core concept teaching of junior high school has become an urgent problem to be solved.To carry out the research on the connection of the core concepts of junior high school chemistry,to understand the current situation and existing problems of the core concept teaching of junior high school,to provide effective suggestions for the convergence of the core concepts of junior high school and to help students make a smooth transition from junior high school to high school.This paper takes the core concept of redox reaction as an example to prepare a questionnaire,and conducts a questionnaire survey on two representative middle and high school students in Qufu City to understand the mastery and understanding of the concept of redox reaction in junior high school and high school students.Students have the dilemma of the concept of redox reaction transformation,and analyze the reasons from the perspective of convergence,and put forward research problems.Combining the related cohesion theory and literature research,according to the positional function of chemical concepts in the knowledge structure,the five core concepts of Chemistry are determined.: material structure,redox reaction,solution,electrochemical knowledge,chemical reaction rate and limit,and the five high chemical core concepts of the middle and high school connectivity analysis.Taking the chemical core concept-redox reaction as an example,compare the requirements of the junior high school chemistry curriculum standards and conduct cohesive analysis;and issue questionnaires in chemistry teachers in the middle and high schools of Qufu City,combined with individual interviews.The law investigates the current situation of the chemistry teachers in junior high school and the teaching of redox reaction.The research shows that the connection between the core concepts of chemistry in juniorhigh school chemistry textbooks is not ideal;the chemistry teachers in junior high school are familiar with the curriculum standards and textbook content of the teaching section,but have little understanding of cross-school curriculum and textbook content,The connection consciousness of concept teaching is obviously insufficient.In the junior high school stage,the redox reaction is judged only from the perspective of oxygen deoxidation,which makes it difficult for high school students to convert from oxygen and oxygen to valence and electron transfer.According to the research results,the connection strategy for the teaching of chemical core concepts is proposed from the three levels of textbook writing,student learning and teacher teaching.The innovations of the thesis are mainly reflected in:(1)For the concept of redox reaction,a questionnaire suitable for middle and high school students is prepared,which is suitable for the questionnaires and interview outlines of junior high school chemistry teachers,with certain qualitative and quantitative analysis.The function provides a new tool for the future research of the core concept teaching of junior high school chemistry;(2)conducts the cohesive analysis of the core concept of redox reaction,finds the connection and difference of the core concept of the middle and high school chemistry,and revise the textbook Provide new basis;(3)to investigate the convergence of the concept of redox reaction in primary and secondary schools,find out the connection point of redox concept,and provide a new perspective for frontline teachers to carry out the teaching of convergence.