An Empirical Study On The Use Of POE To Promote The Conceptual Understanding Of Ion Reaction In High School Students

The concept of chemistry is established in the process of the development of che mical science,and it is a generalized and abstract thinking form of chemical phenome na and chemical facts,which can reflect the laws of chemical motion and essential attr ibutes of similar things.The concept of chemistry is the foundation of the knowledge system of chemistry subject,and ion reaction is the core content of high school chemi stry.It is an important carrier for students to construct chemical concepts such as parti cle view,element view,change view and so on.However,due to the abstract concepts involved in the content of ion reaction,the lack of relevant life experience of students,and the weak abstract thinking ability of senior one students,students are easy to feel difficult and boring when learning "ion reaction",which will produce more different ideas;teachers also have certain difficulties in Teaching,"ion reaction" content is abstract and complex,so teachers should choose effective strategies for teaching.Based on POE strategy,this case designs the course of ion reaction review,visualizes the micro ion change by digital experiment,in order to change students' different ideas,promote students' understanding of the concept,and provide reference for teachers to carry out ion reaction teaching in the future.In this study,first of all,the existing research on the understanding of ion reaction concept and the teaching design of ion reaction is combed,and the previous research on the teaching of ion reaction is summarized.The unique advantages of POE Teaching strategies are analyzed.In theory,Poe strategies can promote the concept understanding of students.After analyzing students' different conception of "ion reaction" and the key and difficult points of "ion reaction",a series of digital experiments were developed and designed as the carrier of POE Teaching strategy.Questionnaire measurement and case interview were used to explore the situation of students' concept understanding,and the following conclusions were drawn:(1)The intervention of POE can promote students' understanding of concepts.(2)Thedevelopment of digital experiment is conducive to the implementation of POE strategy.(3)Establish teaching resource package,and use digital information technology to enrich and improve course resources.Based on the conclusion of the study,it is suggested that teachers should apply POE Teaching Strategy to other content teaching,with students as the main part of the class,and integrate all kinds of digital sensors or other advanced technical resources with chemistry concept teaching in depth.The innovation of this study is to summarize students' different ideas of "ion reaction",apply POE strategy to concept teaching,develop and design digital experiment,as the carrier of POE Teaching strategy,to promote students' concept understanding.