Research On The Construction And Practice Of Redox Reaction Thinking Model From The Perspective Of Chemical Core Literacy

At this stage,the goal of subject education in China has changed from simple knowledge transmission to cultivating students’ core competencies,and the teaching that attaches importance to core competencies is conducive to students internalizing subject expertise into ability,optimizing learning processes and methods,and establishing correct values.In the high school chemistry review stage,emphasis on knowledge transfer is often excessive and the cultivation of core literacy in chemistry subjects is neglected.Redox reaction,as the basic principle and core concept of high school chemistry,runs through the whole process of high school chemistry.Although the explanation of redox reactions in the textbook lists some typical redox reactions,introduces the concept of redox reactions,and establishes a related conceptual system,the overall difficulty is low,the chemical applications and examples involved are relatively small,and students lack understanding and meaningful learning.The topics related to redox reactions appear in the college entrance examination propositions oriented by the core literacy of chemistry disciplines,and the situation is novel,unfamiliar and comprehensive,but students lack the ability to read effective information from the situation.It is difficult to establish the connection between macro and micro.They cannot understand redox reaction from the perspective of change concept and balance,and it is difficult to mobilize existing cognition to explain the principle,predict the phenomenon and analyze and solve the problem.Therefore,it is particularly important to carry out the teaching of redox reaction thinking model construction from the perspective of chemical core literacy.This paper uses literature analysis,questionnaire survey,practical research and other research methods to deeply analyze the construction process of the redox reaction thinking model,and on this basis,propose effective teaching strategies.Firstly,through reading and analyzing a large number of literature,the relevant concepts of mental models are expounded.The construction path of mental models,the mental models related to redox reactions and the learning barriers of redox reactions are summarized.The research topics are determined,which provides direction for the targeted development of mental models and the formation of teaching strategies.This paper elaborates Piaget’s cognitive structure theory,Brunner’s cognitive discovery theory,and constructivist theory,laying a theoretical foundation for the subsequent proposal of redox reaction thinking models and teaching strategies for forming corresponding thinking models.Secondly,it expounds the five core chemical literacy carried by redox reactions in detail,explores students’ learning barriers in redox reactions,and sorts out students’ different levels of learning redox reactions based on advanced learning.Through the questionnaire survey,collect and organize relevant data,analyze the learning situation of redox reaction of the experimental group and the control group,and put forward the "forced weak" model,"analytical model of complex redox reaction" and " analytical models for redox reactions in real situations ".Then,aiming at developing students’ core literacy of chemistry and establishing a redox reaction thinking model,teaching strategies that match different thinking models are proposed and applied to teaching practice.Finally,at the end of the teaching practice,a questionnaire was designed again to conduct a survey,and the students’ answers in the control group and the experimental group were analyzed and compared.In the teaching of redox reaction,the use of the teaching method of thinking model construction,including the "forced weak" model,"analytical model of complex redox reaction" and "analytical model of redox reaction in real situations",can effectively improve the core literacy of students in chemistry and achieve advanced learning of redox reactions.Limited by the lack of theoretical level and limited modeling ability,this research still has many shortcomings.The thinking model of redox reaction should also be continuously refined and optimized in teaching practice to form mature teaching strategies,so as to give full play to the teaching charm of thinking model construction and realize the all-round development of chemistry core literacy!...