Research On The Combination Of Qualitative And Quantitative Methods In Chemical Visualization Experiment Teaching In Middle School

With the official promulgation of Chemistry Curriculum Standards for Senior High School(2017 Edition),the "literatuity-based" teaching concept has attracted the attention of chemistry education researchers and workers,and the realization of this concept depends on the creation of real problem situations and the development of chemical inquiry experiments,so as to promote the transformation of teachers’education methods and students’ learning methods.Through literature review,investigation and analysis,the author chooses to combine qualitative experiment and quantitative experiment,that is,to carry out teaching cases and practice of high school chemistry visualization experiment by setting experimental exploration activities(including miniature experiment and digital experiment)in the form of question chain with the help of modern instruments and equipment,so that students can change their learning methods in experimental exploration.Feel the great significance of the development of science and technology to the development of chemistry,and at the same time provide a new perspective for front-line teachers to carry out experimental teaching.By summarizing the current research background,domestic and foreign research process and research results of the visual experimental teaching combining qualitative and quantitative methods,this study establishes the research content and direction of this paper.At the same time,questionnaire was set up to investigate the current situation of high school chemistry experiment teaching in senior one of the practice school.Based on the above preparation work,the author carried out research on the visual experiment teaching of high school from both theoretical and practical perspectives by combining qualitative and quantitative methods.On the theoretical research,the author puts forward the design principle,case development idea,case content and teaching application strategy of qualitative and quantitative visualization experiment.In the practical research,the author selected two teaching topics,Chemical Reaction and Heat Energy and Factors Affecting the Rate of Chemical Reaction in the high school chemistry teaching edition,as teaching cases and wrote the teaching design.Meanwhile,the parallel class No.1(14)and No.1(15)in Y Middle School of Handan City were selected as experimental class and control class respectively for teaching practice.Through the analysis of students’ scores and classroom observation,the corresponding conclusions are drawn.In order to ensure the scientificity,authenticity and practicability of teaching practice,the author conducted a survey on senior one students in different schools in Nanchang and Handan,and analyzed the survey results and reasons,providing data support for the research and development of qualitative and quantitative visual experimental cases.The study found that the performance of the students in the experimental class was significantly improved compared with that of the students in the front,and it became more and more obvious with the increase of practice times.In addition,students in the experimental class are more interested in learning chemistry than those in the control class,and have stronger subjective initiative,teamwork consciousness and ability to solve practical problems,which indicates that the visual experimental teaching combining qualitative and quantitative methods plays a positive role in improving students’ academic performance and core chemistry literacy.