Research On Visualization Teaching To Promote The Cultivation Of Students’ View Of Particles In Chemistry Teaching

The new chemistry curriculum reform aims to develop students’ core chemistry literacy and advocates the cultivation of basic concepts of chemistry,which provides a basis and support for the teaching of concept construction.The particle concept is one of the basic concepts of chemistry,which is the basis for students to form a macro-micro combination of thinking,and also an important way for students to learn chemistry.However,the traditional chemistry teaching does not pay enough attention to the cultivation of particle concepts,and the invisibility of the microscopic world is the difficulty of particle concept training.In the context of education informatization,visualization has become an important way of learning,and the author uses visualization strategies and methods to conduct teaching design and implementation research on the cultivation of students’ particle concepts,hoping to provide teaching reference for middle school chemistry teachers.Based on the review of the existing research of "visual teaching" and "particle view",this paper proposes the visual teaching design ideas and strategies to promote the cultivation of particle concept,as well as specific visualization methods.The contents of "Ionization Ion Reaction of Electrolyte" and "Redox Reaction" were selected as teaching cases,and the visual teaching design ideas,strategies and methods proposed to promote the cultivation of particle concept were used to carry out teaching design and conduct teaching practice and effect research.Practical results show that the proposed teaching design ideas and strategies are conducive to promoting the cultivation of students’ particle concepts.The thesis consists of seven parts,the main contents are:The first part explains the reasons for the topic.In the second part,we reviewed the research on visual teaching and particle conception.The third part,the purpose and method of research.Part Ⅳ,Theoretical Basis of Research.Based on the existing research,the conceptual definition of visual teaching and particle concept is carried out,and the dual coding theory and the "tower of experience" theory are taken as the theoretical basis of this research.A detailed analysis of the particulate view in secondary school chemistry and the visual teaching resources in the textbook was carried out.In the fifth part,the visual teaching design ideas and strategies to promote the cultivation of particle concepts are proposed.Instructional design ideas include teaching content analysis with particle concept as the core,learning situation analysis,determination of teaching objectives,and design of visual teaching processes.The visual teaching process can comprehensively use a variety of visualization methods to create problem situations,reveal chemical principles,present cognitive ideas,and summarize chemical concepts.Specific visual teaching methods include mock-ups;analog images;digital experiments;and graphical techniques.The sixth part is to promote the visual teaching practice of particle concept cultivation.According to the proposed teaching design ideas and strategies,the selected content is analyzed in detail,the teaching process is designed,and the experimental class is selected for implementation.The teaching effect was tested with self-compiled test papers,the experimental results were statistically analyzed with SPSS software,and students were interviewed after teaching.The seventh part summarizes the research conclusions and puts forward the research questions and prospects.