The Fabrication And Application Research Of The PBL Teaching Mode Based On Evidential Reasoning In Chemistry

Nowadays,more and more attention has been paid to the main body position of students in classes in the field of education,and it is the requirement of the state and society to constantly improve practical ability of problem solving,self-learning and life-long learning ability of the students.PBL(Problem-Based Learning)teaching mode has gradually attracted wide attention and application which aims at improving practical ability of students.The evidential reasoning literacy which was proposed by the National Curriculum Standards(2017 edition)belongs to the cognitive category of the core literacy of chemistry,which reflects the thinking method of chemistry.This study reviews and summarizes the previous research on PBL teaching mode and evidential reasoning literacy by literature research method.In order to understand its development trend,the study analyzes high-frequency keywords which extracted from statistics by using Bicomb bibliographic analysis software,and draws research hotspots which related to PBL teaching mode.Guided by constructivism,humanism and information processing theory,PBL teaching mode based on evidential reasoning is constructed and corresponding strategic guidance is put forward.Instructional design based on this model is carried out for theoretical knowledge,factual knowledge and skill knowledge of chemistry.In the one or two parallel classes,a practical study was carried out.The study analyzes the process of teaching implementation by questionnaire,interview method,and the results were analyzed by SPSS22 data analysis software.The research results show that the PBL teaching mode based on evidential reasoning can promote students' evidential reasoning ability,self-learning ability,group cooperation ability and problem-solving ability,and has a significant effect on improving the core literacy of students in chemistry.It is good for students to understand,master,extract and use knowledges.However,this mode is still in the preliminary stage,and needs further study in the development of PBL teaching materials,teaching design and classroom regulation.In general,the PBL teaching mode based on evidential reasoning provides a useful and effective teaching mode to teachers,and also promotes the transformation of teaching methods and learning methods.