Research On Key Issues In The Teaching Of Physics Concepts And Laws In The Second Year Of Junior High School

This research is based on the junior high school physics research group of the "Practical Research on Key Issues in Primary and Secondary Schools" project,which extracts the key issues of junior high school physics teaching,and further studies on the solution of the second physics concept and the key problems of regular teaching.And formed corresponding teaching cases to provide teachers with ideas and methods.In the first part,following the "top-down" research philosophy,combines the key concepts of physics concepts and regular teaching with the specific teaching content of the second physics.By studying the second physics textbooks of Shanghai Education Publishing House,visiting the old teachers,and interpreting the six key issues of the second physics concept and regular teaching,we compiled the second-level knowledge that matches the key concepts of physical concepts and regular teaching.The key teaching problems are combined with the physical concepts and physical laws of the entire second year of school.The research results are presented in the form of tables,helping teachers in need to understand the key teaching problems that need to be solved in the course content,and mastering the content of the second year of the whole school year.Category and corresponding problem classification.In the second part,based on the requirements of relevant teaching theories and curriculum standards,based on the preliminary theory,the solution strategies for teaching key problems are embodied in the second and second grades,and corresponding teaching cases are formed in the practice process.The solution strategies and related cases are as follows:(1)Key questions about the teaching of heterogeneous thinking: Accurately grasp the students' heterogeneous thinking and create effective classroom situations,which can enable students to experience cognitive conflicts,effectively form concepts or establish laws.The corresponding teaching case is “force and reaction”.(2)Key questions about the definition of the ratio definition method: creating problem situations,guiding students to “line” from“points”,finding patterns from images,and forming a concept of ratio definition,which can promote students to understand the essence of concepts.The corresponding teaching case is “speed”.(3)Key issues in the teaching of analogy: the flexible use of known physical concepts,physical laws,and physical phenomena for analogy teaching not only enables students to acquire new physical concepts and laws,but also helps students form a knowledge system.The corresponding teaching case is“speed”.(4)Key questions about the teaching of the experimental method: changing some of the demonstration experiments into student experiments,and changing some indoor experiments to outdoor activities classes,can more effectively enable students to experience the establishment of physical laws,and then master the physical laws.The corresponding teaching case is "Exploring the characteristics of plane mirror imaging."(5)Key questions about the integration of physics history: Effectively integrating physics history into the classroom can help students master scientific methods and experience the good qualities of physicists.At the same time,allowing students to access the history of physics outside the classroom can improve their lifelong learning literacy.The corresponding teaching case is “ The Story and Enlightenment”.(6)Key questions about the teaching of review class: In the review class,show the“structured”board,encourage students to use the“symbol”to draw the knowledge structure diagram,and set up the experiment comparison class,which can cultivate students' awareness and methods of building knowledge independently.ability.The corresponding teaching case is “Review of the “Sound” unit”.In the third part,during the substitute period,the theory of teaching key issues was studied.Through the comparative analysis of the pre-test and post-test scores of the experimental group and the control group,it is found that the teacher is committed to solving the key teaching problems in the actual teaching,which can improve the students' understanding and mastery of knowledge to a certain extent,and helps improve students' overall grades.From another point of view,solving the key problems of teaching in practical teaching is helpful to teachers' own growth.The research results of this topic reflect the related research on key issues of physics teaching in the form of tables and cases,and can present the specific teaching process and problem-solving ideas through teaching cases,and provide a high-quality development for the junior high school physics teachers to deeply understand the relevant theories of teaching key issues.Teaching,providing practical and specific carriers,provides some reference and resources for the case teaching of junior middle school physics,can help the physics teachers in need to understand the practice mode,improve their teaching content and ability of analyzing the situation,and improve the teaching design and teaching implementation.ability.