The Investigation And Research On Redox Reaction Modeling Ability Of High School Students

“Chemistry curriculum standard for senior high school(2017 Edition,Revised in 2020)”proposes to cultivate the students' core literacy of chemistry disciplines.Competence in discipline of chemistry is the core component of subject core literacy.Chemical modeling ability is the foundation to promote the development of core literacy of "model cognition".Redox reaction is a core concept in high school chemistry.It provides a new perspective for students to understand materials and reactions,which is of great significance to develop chemical thinking.The knowledge of redox reaction is various and complex.Modeling can help students to systematize the content and master relevant knowledge.Therefore,the investigation on redox reaction modeling ability of students can guide teachers to carry out targeted design teaching,improve students' chemistry modeling ability and core literacy of chemistry discipline.This research uses the methods of literature research,text analysis and questionnaire survey,selects 193 students from Shunde Experimental middle school to study the follow questions:What are components of chemical modeling ability? How does the redox reaction modeling ability develop in high school students? What are the current development statuses of the redox reaction modeling ability of high school students? How to promote the development of the redox reaction modeling ability of high school students?The conclusions are as follows:(1)The redox reaction modeling ability of high school students includes: the ability to select model,the ability to express model,the ability to construct model,the ability to apply model.Based on the understanding perspective of “macroscopic–isolated–qualitative;macroscopic–associated–qualitative;microcosmic–associated–qualitative;microcosmic–associated–quantitative”,we divide each component into different levels and constructs a theoretical framework of redox reaction modeling ability.This research designs a good questionnaire about the redox reaction modeling ability of high school students.(2)The results of the survey are as follows: the development of the redox reaction modeling ability of high school students show an upward trend with the growth of grades.The modeling ability of high Grade one students is at level 2 and high Grade two students reach level 3.The score of high Grade two students is significantly higher than that of high Grade one students.The development of high Grade one and high Grade two students in different ability dimensions is not balanced,but on the whole,it shows a trend of increasing with the increase of grade.The redox reaction modeling ability of high school students is positively related to students' academic performance,the ability of the experimental class is better than that of the ordinary class,and the students are better than that of the art class.The modeling ability of boys is higher than that of girls.(3)The suggestions to cultivate redox reaction modeling ability of high school students: use chemistry history teaching to help students form a scientific mental model;use exercises to improve the ability to express model;assign modeling tasks to improve he ability to construct model;use real problems to stimulate the ability to apply model;pay more attention to modeling teaching to cultivate redox reaction modeling ability of high school students.There are three innovations.The first one,this research fills the gap of chemical modeling in redox reaction.The second is that this research designs a good questionnaire about the redox reaction modeling ability of high school students.The third is that this research analyzes the current situation and causes of the redox reaction modeling ability of high school student,and puts forward some teaching suggestions.