Practice Research Of High School Chemistry Experiment Teaching Based On "Concept Of Green Chemistry"

Seeking green development is an indispensable pursuit in the 21st century.Green chemistry is a development element related to the effective use of raw materials,waste management and human health,safety and environment.Green chemistry education provides an opportunity to integrate the concept of green development into school practice.In view of the requirements of the national green development and the need to implement the experimental teaching of chemistry,this research designs and practices high school experimental instructional cases according to the theory of green chemistry,in order to cultivate students' green chemical thinking and behavior.Through the literature research means to analyze the domestic and foreign document,master the research status and development trend of the development of green chemistry,clarify the research direction and significance of this subject,and take Tao Xingzhi's life education concept and Maslow's hierarchy of needs theory as the guiding ideology.And using the questionnaire survey,we know that senior high school students have less green chemistry knowledge and weak green thinking as a whole;From the interview,it is concluded that teachers hold supportive attitudes towards teaching in the background of green chemistry in middle schools,although it is difficult to pass the experimental teaching practice.Therefore,this study selects three traditional experiments that are easy to produce toxic substances in the textbook of people's Education Edition for optimization,improves the experimental integration of "preparation and property test of chlorine",designs the experimental miniaturization of "preparation and property test of sulfur dioxide" and carries out the experimental sealing treatment of "reaction of copper with high and low concentrations of nitric acid";Then the instructional cases are implemented in the two class samples of the internship school.Before and after the teaching practice,the test paper of this study is formulated according to the basic level of students.When the difficulty of the test questions is equal,the students in two classes are tested respectively;Using SPSS 26 to analyze the data,it shows that the students' green chemistry thinking is improved as a whole after practice;After that,according to the students' attitude towards green chemistry experiment teaching,self-assessment of their performance in green chemistry experiment classroom and the change of self-assessment after teaching practice,we learned that the students gave high satisfaction to green chemistry experiment classroom.It is found that the experimental instructional cases based on green chemistry theory can improve the interest of chemistry classroom,be more easily accepted by students,which can stimulate students' interest in chemistry learning and improve students' enthusiasm to participate in the classroom;Emphasizing green chemistry in experimental teaching classroom is also helpful to the development of students' environmental consciousness and behavior,and lays a foundation for students to establish a positive attitude towards life and future scientific development.