Application Research Of Online And Offline Blended Teaching In The "post-epidemic Era" In The Third Round Of Senior High School Review

The Covid-19 from early 2020 changed the previous model of face-to-face classroom instruction,which suddenly left students and teachers with the relatively new online teaching model of television or webcasting as a passive option.The hard conditions needed for online teaching have long been in place since the twenty-first century.However,influenced by the general environment,most schools across the country rarely used the Internet for live teaching before the epidemic.While there are many advantages to online teaching platforms that break through time and space constraints,the online teaching implemented during the epidemic also revealed many problems.As the epidemic was brought under control,schools across the country began to resume traditional offline teaching.Although online classes cannot replace offline teaching,with the development of modern information technology,but many schools will have the inevitable trend to combine information technology and classroom.The chemistry review class in Senior Three is different from the new chemistry class in Senior One and Senior Two,because teachers need to form a systematic knowledge network of students' existing knowledge.Most teachers feel that there are the following problems in chemistry review in Senior Three: students need to review a lot of content,and classroom teaching time is tight;Students' review efficiency is not high,and they often learn the back and forget the front;Most of the contents of the review are what students have learned,which leads to problems such as students having little interest in learning.In view of these problems,we need to find a suitable teaching method to improve the teaching effect of chemistry review class in Senior Three.For the application of online and offline mixed teaching in the process of senior chemistry round review,this thesis combines the author's personal experience and focuses on the following aspects.The first part mainly elaborates the research background.By reviewing a large amount of literature on mixed teaching research at home and abroad,this paper analyzes the current state of research,clarifies the purpose and significance of this study,and sorts out the research ideas and main research methods.The second part discusses learning theories such as humanism,nearest developmental zone,constructivism,multiple intelligences,cognitive load and other learning theories as well as clarifies the concepts related to mixed teaching.The third part clarifies the main design ideas and design process of mixed instruction by reviewing the literature.In the fourth part,through communicating with chemistry teachers of Senior Three in different schools in this area,we can simply understand the review status of Senior Three and teachers' understanding of mixed teaching.This part combines the third part's mixed teaching design principles and teaching process,and the mixed teaching design process suitable for the first round of chemistry review in Senior Three was sorted out,and the topic "Redox Reaction" was selected for mixed teaching practice.By comparing students' scores,conducting questionnaires and interviews with students in experimental classes,this paper attempts to understand the advantages and problems of mixed teaching in the actual teaching process.Combining the results of teachers' interviews,teaching practice and students' interviews,this study mixed some teaching suggestions from the aspects of students,teachers and schools.The fifth part first outlines the main findings of this study,then reflects on the shortcomings of this study,and finally discusses the development of information technology.This paper argues that the combination of information technology and offline classroom will be an inevitable trend,but mixed teaching has high requirements for teachers' comprehensive ability,so the allocation of students' learning time and the selection of teaching contents are problems that need to be solved.How to give full play to the advantages of online and offline teaching in the future and improve the efficiency of actual classroom teaching are all issues that need to be considered and for which we have miles to go.