Exploration And Practice On The Improvement Of Chemistry Experiment In Senior High School

In the new curriculum reform,chemical experiment teaching is more and more close to life,paying attention to inquiry,and using an increasing number of advanced teaching methods.Chemical experiments have been significantly increased in the new textbooks,such as the elective module of experimental chemistry.In this module,more experimental exploration design is added,and some more advanced chemical experiments and chemical teaching technologies are introduced,which makes the status of chemical experiments in teaching more prominent.The improved experimental teaching will be more inclined to teachers as the roles of auxiliary teaching,students as the main body,teachers are responsible for guiding students to design experiments through team cooperation and other ways,and independently complete the follow-up observation,analysis,discussion and other processes.In this way,it can not only improve the ability of students in doing various experiments,but also strengthen the memory and understanding of knowledge points.It can also stimulate students' interests in learning and lay a good foundation for future study.Most of the exploratory experimental designs in the textbook are reasonable,but there are still some deficiencies in some experiments,for example,the experimental design is not environmental protection,such as the lack of environmental protection in the experimental design,there is not strict control of variables(the lack of strict control of variables),or the feasibility is not strong enough or the lack of strong feasibility,time-consuming,low success rate or expensive drugs.Since there are shortcomings,we can continue to explore and find more reasonable experimental designs and experimental teaching methods.And in teaching,students' independent "inquiry" experiments are often based on verification.There are many demonstration experiments in textbooks,and many teachers still prefer to demonstrate experiments.The teaching process is usually as follows: teachers explain knowledge points first,then do demonstration experiments and guide students to observe and record the experimental phenomena carefully.After the experimental operation is completed,teachers and students analyze the experiment together At the end of the class,students are often asked to repeat the important and difficult points and matters needing attention in the experiment.With the partial teaching,students may be able to master knowledge in a short time,but to a certain extent,it hinders the improvement of students' comprehensive ability.In the case that the teacher has already taught the relevant knowledge points and has done the demonstration experiment,the teacher has prepared the experimental supplies in advance,and the students do the experiment again in the laboratory.This experimental teaching mode can help students to be familiar with the basic experimental operations,deepen the memory of the experimental process and related knowledge points,but it is not very good for the cultivation of students' ability.At the same time,students are easy to develop the bad habit of not thinking,not exploring,not questioning and not practicing.These are the problems reflected in the experimental teaching.This paper mainly through consulting a large number of literatures to determine the topic and draw up several experiments which are needed to be improved in the textbook.After the experimental exploration,combined with the literature review,the case study is analyzed.After the completion of the experimental teaching method and the improvement of teaching methods,then according to the feedback of students to further improve the teaching design.Through investigation and analysis,it is found that there are some problems in some experimental teaching in senior high school chemistry human education press.Then,according to the principle of experimental improvement,some experiments in the textbook are improved.Through case analysis and questionnaire survey,the effect of improvement is tested.According to the innovative education concept and constructivism learning concept,the existing problems in chemistry experimental teaching are put forward The corresponding improvement countermeasures are put forward.This paper is divided into five parts:The first part: Question raising.This paper analyzes the characteristics of the college entrance examination experiment module,combined with the contents emphasized in the new textbook curriculum standard,reflecting the general problem of students' lack of comprehensive experimental literacy.Through the investigation and analysis of high school chemistry experimental teaching materials,and the investigation of the current situation of experimental teaching in local and adjacent cities,it is concluded that the experimental teaching in high school chemistry new curriculum has become more and more close to life,paid attention to exploration,and used more and more advanced teaching methods.At the same time,the position and function of experiments in chemistry teaching were expounded.The second part: The significance and research methods of this paper.Aiming at the first part of the question,this paper summarizes the importance of exploratory experimental teaching,and expounds the research significance of improving experiments and implementing exploratory experimental teaching from many aspects,which is conducive to improving teaching materials,improving students' innovation ability,and students' interests in learning chemistry.The research of this topic adopts a variety of research methods,consulting a large number of literatures,carrying out experimental exploration,combining with the literatures,the research case is analyzed,and after class teaching,the teaching design is further improved according to the feedback of students.The third part: Several theoretical basis and basic concept support.This paper analyzes the concept of the new curriculum standard,cognitive theory,scientific inquiry training objectives and ability elements,analyzes several not rigorous experiments in the current high school chemistry textbooks,and puts forward his own ideas from the aspects of device,drug and teaching technology improvement.The fourth part: Experimental improvement cases.Through the experimental exploration,the experiment is improved reasonably,and then the improved results are applied to the actual teaching.Through the questionnaire and the case study of the students after class,this paper analyzes the five questions put forward by the students.At the same time,some interesting experiments in life are introduced.The fifth part: summarize the research results of this paper,and look forward to the future direction of chemical experiment teaching.