Teaching Design And Practice Research Of High School Chemistry Five-Line Teaching Mode Under The Concept Of Green Chemistry

The new era puts forward higher requirements for the environment and chemical production,and the national and curriculum standards attach great importance to the concept of green chemistry,and it is very important to implement the concept of green chemistry in middle school teaching through research and analysis at home and abroad,but through investigation and analysis,the school does not integrate the concept of green chemistry with chemistry teaching well.Therefore,through questionnaire surveys,interviews,case practices,etc.,this study determined the teaching of infiltrating the concept of green chemistry through the five-line teaching mode,that is,the five lines of life line,history line,inquiry line,knowledge line and application line run through the teaching link,and combined with the specific situation of students,three suitable teaching contents were designed to carry out teaching practice and verification.The practical effect has reached the expected goal,and the goal of improving students’ awareness of green chemistry and forming the concept of green chemistry has been achieved.This study consists of four parts:The first part,Introduction.This part mainly includes the research background,research status at home and abroad,research purpose and significance.The second part is the definition,theoretical basis and scheme design of related concepts.This paper mainly expounds the concepts of green chemistry concept and five-line teaching mode,and uses the theoretical foundations of pragmatism,humanism and constructivism as the support to design the scheme of this study.The third part is the investigation and analysis of the current situation of green chemistry education in practical high schools and teaching practice.The survey and analysis mainly included students’attitude and understanding of the concept of green chemistry and the five-line teaching mode,the degree of involvement of green chemistry education and the five-line teaching mode in the teaching process of teachers,and students’ thinking about green chemistry in daily life.The teaching practice is divided into two parts:theoretical teaching and experimental teaching,in "metal corrosion and protection",through the exploration of oxygen absorption corrosion and hydrogen evolution corrosion to understand the essence of metal corrosion,and through students’ independent design of metal protection scheme,learn the application of electrolytic cells and galvanic cells,and cultivate students’ awareness of resource conservation;In "Optimization of Chemical Reaction Conditions.Industrial Ammonia Synthesis",roleplaying methods are used to carry out industrial ammonia synthesis activities,in which students independently consider resource conservation and the treatment of waste gas,waste liquid,waste,etc.,to help students establish a green chemistry concept system;The micro-production experiment of chlorine gas in the "scientific use of chlorine-containing disinfectants" not only reduces the amount of chlorine used and the amount of harmful gas chlorine,but also avoids the harm to the environment through alkali recovery.In practice,the teaching plan is constantly modified and improved through self,student and teacher evaluation,and after multiple teachings,the effect of teaching implementation is obtained by conducting paper and pencil tests on students in two parallel classes:the two selected classes have comparable chemistry scores,of which the experimental class uses the five-line teaching mode for teaching,the control class is regular teaching,and the paper and pen test is carried out after the end of practice,after data analysis,the average score of the experimental class is 63.17,and the average score of the control class is 58.16,which has a significant improvement,indicating that this study is feasible.The fourth part is the conclusion and prospect of the implementation of green chemistry concept teaching in high school chemistry.The analysis proves that the five-line teaching mode is feasible for the teaching of green chemistry concepts,which is helpful to cultivate students’ green chemistry concepts and provide teaching reference for chemistry teachers to carry out green chemistry concepts,but there are still shortcomings,and it is necessary to continue to verify the practice.It also looks forward to ways to penetrate the concept of green chemistry,such as carrying out thematic activities,thematic teaching,setting up material libraries,and implementing large-unit teaching.