Design And Implementation Of Chemistry Teaching Case In Middle School Based On Oleoresin

With the increasing concern of global ecological environment,energy utilization and other sustainability issues,"carbon peak" and "carbon neutral" have been incorporated into the development goals of various countries.The current chemistry curriculum should also respond to the direction and development needs of society.Chemistry teachers should pay more attention to "close to life" and "close to social reality" when carrying out chemistry teaching practice.Rosin,turpentine and rosin are common substances in our daily life.Their collection or extraction,processing and application have far-reaching educational value and are inextricably linked with organic chemistry.In this paper,we carried out a preliminary exploration on the introduction of rosin into middle school chemistry curriculum.On the basis of systematic literature research,this study first used the self-made questionnaire to analyze the learning situation of some freshmen of Leifeng school in Wangcheng District of Changsha City,and realized the feasibility of design and implementation of middle school chemistry teaching case based on rosin.Secondly,based on the survey results and referring to the provisions and Implementation Suggestions of the curriculum standards,four teaching cases of "understanding organic compounds","protecting pine forest resources","collection and application of pine resin" and "distillation experiment of pine resin" were compiled for senior one,and teaching practice was carried out in the chemical community class.Thirdly,we use the self-designed questionnaire to understand the practical effect of the teaching cases in grade one,and reflect and adjust the teaching.Then in the chemistry teaching practice of grade one,combined with the two sections of olefin and carboxylic acid derivatives in PEP high school chemistry selective compulsory 3 textbook and the relevant provisions of the curriculum standards,two teaching cases of olefin and turpentine and carboxylic acid and rosin were designed by using the properties and application of rosin.In the research and practice,it is found that most of the freshmen are interested in the compounds in life.They are enthusiastic about learning the knowledge beyond the chemistry textbook and learning chemistry more deeply,and have a certain foundation of knowledge and ability development.It is an attempt of educational value to design the teaching case of middle school chemistry course based on oleoresin,and the feedback from the students of chemistry community class is positive and positive.It is suggested that chemistry teachers should pay attention to the development of chemical resources in daily life;Pay attention to students’ initiative in chemistry class;Focus on the reflection and continuous improvement of teaching cases.