Research On The Effect Of"electrochemistry" Teaching Design Based On Triple Representation On Senior High School Students' View Of Chemical Particles

The concept of particles centered on molecular atoms is not only an important part of the basic concept of chemistry,but also the most basic part of the basic concept of chemistry.The ability to understand the material world from a microcosmic point of view is one of the abilities that students should master in chemistry.To analyze the essence of chemical reaction is the embodiment of micro representation in triple representation,and the teaching of triple characterization is the teaching mode which can best reflect the characteristics of chemistry.Therefore,this study focuses on the close relationship between particle view and triple representation.According to the knowledge of electrochemistry,the teaching design of triple representation is used to guide the students to understand the matter and its changing law from the microcosmic point of view,and to cultivate the students' micro-particle view.This research selects the first section "original battery" and the third section "electrolytic cell" in the fourth chapter "Electrochemistry Foundation" as the teaching content,and analyzes its concentrated embodiment in these two sections of teaching content in combination with the meaning of the micro-particle view,which is the first section of "the original battery" and "electrolytic cell" in the fourth chapter "Electrochemistry Foundation".Based on this,a pre-test questionnaire and a post-test questionnaire were designed.By analyzing the pre-test data,it was found that there was no significant difference between the experimental class and the control class in their particle views(including particle composition view,particle gap view,particle motion view and particle action view)before learning this chapter.On the basis of analyzing the relationship between the two sections and the triple representation teaching,the author designs and implements the teaching design based on the triple representation theory.By analyzing the data of the post-test questionnaire,we can see that there are significant differences between the experimental class and the control class on the whole,and there is no significant difference in the "particle composition view" and the "particle gap view" between the experimental class and the control class.There are significant differences between "particle motion view" and "particle action view".The results show that:(1)after the teaching of triple representation,students in the experimental class have a higher understanding of the "particle view" than that in the control class,and there is a significant difference between the two groups.(2)the students' ability to understand the "particle motion view" and "particle action view" in the experimental class was higher than that in the control class,and there was a significant difference.