Research On The Teaching Practice Of Ion Balance In Aqueous Solution Review Course Based On The Changing Concepts And Balancing Thoughts

“Ion balance in aqueous solution” is the key teaching content of the chemical optional compulsory course "principles of chemical reaction" in high school.It’s also an important knowledge carrier to foster high school students to change the concept and balance the core quality of thinking.With the formal implementation of the new curriculum standard,many investigators have launched teaching strategies and practice researches based on accomplishment development,and some accomplishment-oriented excellent teaching cases have emerged gradually.Combing the current relevant studies,it is found that there are few teaching cases of review course based on accomplishment development,while the teaching cases of review course,“Ion balance in aqueous solution” based on accomplishment development have not been studied.Through investigation and interview,the learning obstacles of students under“Ion balance in aqueous solution” course were figured out.According to the research of literature and curriculum standards,the teaching strategies of this review course based on accomplishment development were determined.On the basis of the above,we designed the teaching case of this review course with the concept of change and balance,and practiced it in the actual classroom.The results show that the teaching case has a good effect on the development of students’ change concept and balanced ideological literacy.This paper is divided into the following five parts.The first part introduces the research background,analyzes the purpose and value of this research,defines the research content,methods,and formulates the research framework.In the second part,the related explanations of "change concept","balance thought" and "ion balance in aqueous solution" were defined by literature method,and the current research status and shortcomings of "change concept and balance thought" and "ion balance in aqueous solution" were analyzed.The third part is the focus of this paper.Firstly,through one-to-one interviews with many front-line teachers,the learning obstacles of students under the course “Ion balance in aqueous solution” were understood.Then,through the interpretation of the curriculum standard and the analysis of the content of teaching materials,the teaching strategy of this review course were determined.Finally,the relative review course based on the concept of change and the idea of balance was designed.The fourth part is the empirical research.Before the research,the accomplishment level division standard and evaluation index of "change concept and balance thought" were determined,and the test of “Ion balance in aqueous solution”course was formulated according to the literature research and the interpretation of the curriculum standard literacy level.In the empirical study,two parallel classes in C City were selected for teaching implementation.The experimental group was taught according to the accomplishment oriented teaching cases,and the control group was taught according to the traditional way.After the implementation,the two groups of students were evaluated and analyzed.The fifth part is the summary and reflection of this paper.The research showed that the teaching case of the review course “Ion balance in aqueous solution” based on accomplishment orientation could attract more attention from students,and at the same time the level of changing concept and balancing ideological accomplishment for students has also been improved.