Research On Improvement Of Physical Optics Demonstration Experiment In Junior High School

Physics is an experiment-based science.At the end of November 2019,the Ministry of Education issued the "Opinions on Strengthening and Improving Experimental Teaching in Primary and Secondary Schools".The "Opinions" pointed out that experimental teaching is an important part of the national curriculum plan and curriculum standards.Teaching content is an important way to cultivate innovative talents.Demonstration experiments are an important part of physics experiment teaching.In recent years,research on experimental teaching has received more and more attention.At present,the research on experimental teaching is mostly based on current research and improvement strategies,and there are few researches on the improvement of experimental teaching aids.Existing researches on experimental teaching aids are mostly based on the improvement of one or several experimental teaching aids,and there is a lack of systematic improvement research.This research focuses on the improvement and innovation of demonstration experiments,and systematically analyzes the demonstration experiments of the optics part of the eighth grade of junior high school physics published by the People's Education Edition,mainly focusing on the improvement and innovation of experimental teaching aids.This paper analyzes the existing problems of current experimental teaching research in our country by consulting a large number of documents,and establishes the main research content and research methods of this research.First,through student questionnaires and teacher interviews,the current situation of Toutunhe District junior high school physics demonstration experiment teaching is investigated,and the experiment is demonstrated.The current teaching situation is summarized as follows:(1)The laboratory equipment is basically complete;(2)The role of the demonstration experiment is affirmed by teachers and students;(3)The opening rate of demonstration experiment projects is not high due to the outdated experimental equipment and the experimental phenomenon is not obvious;(4)The lack of innovation in the development of teaching aids for demonstration experiments;(5)The problem of low visibility of optical module experimental phenomena is obvious.From the survey results,it can be seen that there are many problems in the current demonstration experiment teaching,and it is of great practical significance to improve the demonstration experiment.Secondly,combined with the existing theoretical basis,summarized the principles and steps for the improvement of the demonstration experiment teaching aids.There are five principles for the demonstration experiment improvement,which are:(1)scientific principle;(2)feasibility principle;(3)lifeliness principle;(4)visibility principle;(5)Heuristic principle.The improvement steps of the demonstration experiment are divided into four steps,namely:(1)Analysis of teaching materials and existing improvement plans;(2)Design improvement plans;(3)Making teaching aids;(4)Summary and evaluation.Finally,based on the principles of the improvement of the demonstration experiment teaching aids and following the steps of the experiment improvement,combined with the survey results,the part of the demonstration experiment of the junior high school physics optics module was improved and innovative research,and the characteristics of the flat mirror imaging,which were more problematic,were explored in the interview.The three experiments of light refraction and projector have been improved,combined with the analysis of textbooks and actual teaching needs,three new experiments have been designed for a total of several images,where are the fish,and the water lens.It is hoped that this research will provide some references for the improvement of front-line physics demonstration experiments and the compilation of new teaching materials for compulsory education.