Teaching Design And Practical Research On The Permeating Of "Green Chemistry" Concept In Middle School Chemistry Teaching

Green chemistry is the design of chemical products and processes that can reduce or eliminate the use and production of hazardous substances.It is a discipline that reduces or eliminates pollution at the source.The proposal of green chemistry meets the needs of sustainable development in the future,and meets the needs of green development proposed by General Secretary Xi Jinping.Therefore,it is very important to implement green chemistry teaching in middle school chemistry teaching.Green chemistry teaching is a kind of bilateral teaching and learning activity that penetrates the concept of green chemistry teaching into middle school chemistry teaching.By investigating and analyzing the penetration status of the concept of "green chemistry" in chemistry teaching in middle schools,it is found that due to the lack of penetration methods,some teachers rarely develop and apply teaching activities that penetrate the concept of "green chemistry" in actual teaching.Therefore,the teaching strategies of permeating ideas in theoretical teaching and experimental teaching of middle school chemistry are proposed.At the same time,in order to verify the effectiveness of the proposed strategies,three specific teaching schemes that integrated the concept of "green chemistry" into teaching are designed,then the author carries out teaching practice and testing.The effect of practice has reached the expectation.The teaching purpose of improving students' green chemistry awareness and forming green chemistry thinking has achieved.This paper mainly contains the following five parts:Part 1:Introduction.The necessity of implementing green chemistry education is discussed,the significance of permeating the concept of "green chemistry" into middle school chemistry teaching is stated,and the research purpose,content,ideas and research methods of this thesis is clarified.Part ?:Definition of related concepts and research review.It mainly expounds the research situation of green chemistry education at home and abroad.The concept of green chemistry is defined,and the relevant theoretical basis for the research of this paper is introduced.Part ?:Investigation and analysis of the current status of the concept of "green chemistry"penetrating into middle school chemistry teaching.Through the design and implementation of questionnaires for student and teachers,and interviews with teachers,it is obtained that teachers are currently restricted by time and experimental conditions and have fewer teaching activities to penetrate the concept of "green chemistry" in middle school chemistry teaching.Part ?:The teaching strategies of permeating the concept of "green chemistry" in middle school chemistry teaching.According to the analysis of the reasons for the above current status,the teaching strategies of permeating the concept of "green chemistry" from the aspects of chemistry theory and experiment are proposed.In theoretical teaching,it is necessary to fully excavate the content of the textbook to find penetration points and adopt exercises that penetrate the concept of "green chemistry"and other forms;In the experiment,we should strengthen the penetration from the experimental process,introduce the combination of conventional teaching and virtual simulation experiment,and design and use micro experiments to achieve the penetration of the "green chemistry" concept in teaching.Part ?:Teaching case design and practical implementation permeating the concept of "green chemistry".Aiming at the two parts of theoretical teaching and experimental teaching,the "extraction"taken as an example(theoretical teaching),the "properties of chlorine" combined with virtual simulation experiments,and the "sulfur and its compounds" combined with micro experiments(experimental teaching)are selected,designed and practiced.In practice,the teaching case design is modified through the teacher evaluation,student evaluation and self-evaluation.And after many teachings,through interviews with students,the author obtains the effect evaluation of practice implementation.Part ?:Research conclusions and prospects of the thesis.Through research and practice,it is concluded that the concept of "green chemistry" penetration in middle school chemistry teaching is feasible and effective,which helps to cultivate students' green chemistry awareness and form green chemistry thinking.Some strategies proposed by the thesis to penetrate the concept of "green chemistry"in teaching have practical value and can provide teachers with teaching reference.In addition,the paper also prospects the research and development.