A Comparative Study Of PCK Between Pre Service Chemistry Teachers And Experienced Chemistry Teachers

Modern education is based on the era of knowledge economy and aims at cultivating students’ core quality.Teachers are the key personnel in the implementation of education.As the main force of China’s basic education in the future,pre service teachers’ education level and teaching quality determine the development level of China’s education to a great extent.Teachers can transform academic knowledge into teaching knowledge by using disciplinary content knowledge(PCK),which also reflects teachers’ professional knowledge and ability.Research on Teachers’ PCK can help pre service teachers find their own shortcomings,grow rapidly,be competent for school teaching,and realize teachers’professional development.In this study,the first compulsory volume of high school chemistry PEP "ion reaction"(the first class)as the carrier,after sorting out the foreign PCK evaluation literature,the evaluation scale suitable for this study was selected and adapted,and finally the PCK analysis scale and scoring standard were obtained.In order to explore the differences of PCK between expert teachers and pre service teachers in the same middle school in Wuhan,the video recording and transcribing coding were carried out.It is hoped that pre service teachers and front-line teachers can get inspiration from it,so as to improve their professional knowledge and ability.The results show that:(1)teachers’ science teaching orientation affects teaching practice;(2)pre service teachers’ lack of knowledge about students’ understanding;(3)teachers’ science curriculum knowledge needs to be continuously expanded and systematized;(4)expert teachers’ teaching strategies are more appropriate.The innovations of this study are as follows(1)In the domestic research,the research on PCK of chemistry teachers is mostly focused on the front-line teachers.This study expands the research object to the pre service teachers,pays attention to the differences between the pre service teachers’ PCK level and the expert teachers’ PCK,and helps the pre service teachers to grow rapidly.(2)Compared with the survey based measurement,this study uses gauge analysis.In order to deeply analyze the PCK of the two teachers,in the process of data analysis,we first code the key nodes in the classroom transcripts according to the established coding rules,and focus on the important content for more detailed and in-depth analysis.