Research On The Investigation And Experiment Expansion Of High School Chemistry Experiment Teaching

Chemistry is a science based on experiment,and experiment is a powerful tool to promote the development of chemical science.In order to improve classroom efficiency and develop quality education,the reform of chemical experiment teaching is deepening,and the function of experiment teaching is becoming more and more important.The present situation of chemical experiment teaching in senior high school in Zhangjiakou city is investigated.The results of the investigation show that the current situation of chemical experiment teaching in middle school is not optimistic,and there are many deficiencies in chemistry teaching.In this thesis,the factors affecting experimental teaching are analyzed,the research topic of investigation and expansion of chemical experiment teaching in senior high school is put forward and the design ideas of chemical experiment innovation,integration of chemical experiment and practice activities are illustrated with practical cases.The results of this study provide a reference for teachers' experimental teaching.Specifically reflected in the following aspects:The first,This paper reviews the current situation of chemical experiment teaching in middle schools at home and abroad and analyzes the reform of experimental teaching.The second,In order to understand teachers' and students' cognition of experiment function and their attitude towards experiment teaching reform,the current situation chemical experiment teaching in senior high schools in Zhangjiakou area is investigated.The third,According to the investigation results,the design scheme of experimental innovation and chemical practice is put forward: the experimental innovation effectively improves some experiments in the teaching materials,which were not obvious phenomenon,low success rate,heavy pollution,long time consuming and abstract principle.the fountain experimental device,the anti reverse suction device,and the gap generator device are improved by using the principle of pressure difference made by the air cylinder.Improved oxygen absorption corrosion device for iron.The elimination reaction device of bromoethane is improved by magnetic stirrer.This thesis expounds the design idea of experimental innovation with practical cases,simplifies the experimental principle,visualizes the experimental process,improves the experimental effect,and helps students deeply understand the experimental principle.Sulfur dioxide practical activities are used to design chemical practice.Chemical experiments and practical activities are integrated to solve difficult chemical problems and break through teaching difficulties.At the same time,starting from the practical problems,it could find out the chemical practice plan,combine the chemical teaching with the society,and fully implement the chemical core literacy.Besides,it provides reference for teachers' practice teaching.The last,This thesis expounds the research content,and puts forward the shortcomings of this research,hoping to arouse the attention of chemical educators to the experimental teaching.And it could actively explore and expand the experiment,optimize the experimental design.It gives full play to the teaching function of the experiment.It pays attention to the cultivation of students' experimental inquiry ability and innovation ability.It improves the students' chemical literacy.