Research And Practice Of Problem-Oriented Hybrid Teaching Of Chemistry In High School

In recent years,covid-19 went rival in the world many times.Teaching in the high school has to adopt virtual + at-school mode to ensure students’ learning continued.Nevertheless,the efficiency and effect of the mode is not ideal.Teachers thus have to explore new teaching modes based on their subjects to ensure high teaching quality in the face of new challenges.Education is based on science,while teaching is a kind of art.Scientific and artistic teaching is done based on teaching theories and subject characteristics,also requires to learn lessons from practices and reflection.This thesis first adopted literature research on plenty of papers on chemistry education in high school,and identified constructivism theory,situational learning theory and cooperative learning theory as basic guidelines for the teaching plan.Through literature review,the thesis summarized the origin,development and core value of the concept of problem-based learning(PBL).Considering experiment features of chemistry and the target of chemistry lessons in the high school,PBL mode could be used in the whole teaching plan across phases.Then the author designed and used different teaching cased to explore possible problems in this mode.After that,survey and interview were conducted to evaluate the effect of teaching.Finally,the author summarized principles and methods of making a PBL-based teaching plan.Implementing PBL mode and achieving sound effects require three column elements,that is,problem design,and the position of the teacher and the student.Problem design is key to the PBL mode and the lesson design.The problem should be designed with a target and logic,and could be open to answers.In the PBL mode,the teacher is to design and cooperate,while the student is to cooperate and learn independently.Here cooperation refers to that between the teacher and students,and among students,to explore answers for an open-end problem via internet connection.The teaching process of the PBL mode is as following:The major subject of this thesis is to explore how to apply the PBL mode to different teaching contents of the high school,and realize online learning interaction between the computer and the people,and among people via internet.The PLB-based mixed teaching for high school chemistry is integrated,targeted,and problem-based.It treats students as the subject and the teacher as the guide,and uses four methods,that is,online preliminary learning,offline in-depth learning,offline internalized learning and online extended learning.The teaching plan discussed in this thesis is not merely a combination of online and offline learning,but an active integration of teaching and learning,as well as computers and mankind through “problems”.Problems are the core of teaching,and the teacher and students are connected via internet without time and space restrictions.The results showed that PBL mode can eliminate major obstacles of virtual learning,and help students to develop capabilities of analyzing and solving problems,to achieve the final target of talent development.