Research And Instructional Design About Demonstration Experiments In Middle School Chemistry Textbook Published By People's Education Press

After the education reform,experimental teaching has gradually become the core of chemistry teaching.Since Subject Central Theory,Teacher-centered Theory,the exam-oriented education and other factors,experiment teaching is difficult to give full play to and carry out the function.The experiment teaching is still the weakest link of high school chemistry teaching.There are many problems which cannot be ignored in the process of implementing.As the most common and most widely used means of experimental teaching,demonstration experiment has an irreplaceable role in the chemistry teaching.The improvement and optimization of the demonstration experiment become the best way to develop experimental teaching of teaching value.This paper carries out the research by interviewing,reading literature,and experimenting.After reviewing the literature about middle school chemistry experiment teaching,secondary school chemical experiment improvement,innovation of middle school chemistry experiment,inducing and summarizing the chemistry experiment method of improvement and innovation.And communicating with high school chemistry teachers and students,understand the middle school chemical experiment teaching present situation,combining with the teaching actual demand,the statistical analysis of the current experiment in the teaching material,to discover the shortage of current teaching material experiment part may be in the experimental teaching,explore the scientific,under the premise of the feasibility,safety,and optimization,to enhance the experimental study of sex and interactive,making experiments,green life and fun,let students experience the experiments to explore the basic process,experience the fun of experiments to explore,to cultivate students innovative thinking and innovation ability,improve students' experimental skills and experimental design capabilities.This paper is divided into four parts: the first part briefly describes the research situation of chemical experiment teaching;The second part is the core concept definition and demonstration experiment principle and way in this paper,the improved;In the third part,I am doing my research according to guidance from first-line teachers and previous research results.Improving the experiment device of the reaction about Cu and nitric acid,preparing NO and NO2 in penicillin bottle;Exploring the influencing factors of the preparation about Fe(OH)2 precipitate and Fe(OH)3 gel.Optimizing the selection of solvent concentration,temperature and additive in the experimental process,enhanced the effect;Simulating the formation and harm of acid rain according to the changes of plant growth condition,let students feel the influence of acid rain on plant growth.At the same time,all improvement and optimization results will be established in the experimental demonstration experiment teaching;The fourth part is the summary and reflection about this research.