A Practical Study On The Construction Of Students' Microscopic View In Middle School Chemistry Teaching

The particle concept centered on molecular atoms is an important part of chemistry,which is also the most basic part of the basic chemical concepts.Observing the material world from a microscopic perspective is an important thinking way of chemical Learning,which should be grasped.Focusing on the study of middle school chemistry and the future development of students,junior middle school students in grade 3 are guided to understand substances and their changing laws from a microscopic perspective,and the construction of the microscopic view has become an important goal in junior chemistry teaching.This thesis has summarized the main contents of chemical concept of particles in junior middle school.Find the way in which micro-concept is reflected and the specific location in textbooks by linking the fundamental meaning of micro-concept under the premise of exploring chemistry textbooks for middle school.Through student-oriented surveys,the foothold and key point in teaching has been found by grasping whether the students have the prototype of micro-concept before they come into contact with this subject.Through conversations with teachers of various teaching ages,the methods,countermeasures and the various problems in the teaching of micro-concept were acquired.According to my own teaching inquiry and the practice of micro-concept in teaching,the related strategies to help students to form the correct micro-concept has been proposed: firstly,grasping the cognitive status of the student's microscopic view,the link between the old and new knowledge based on the actual situation of the student should be completed;secondly,exploring of the overall grasp of the material,teaching should be planned according to the layout of material's particle concept;thirdly,vivid learning environment to inspire students' interests should be created staring from student's daily life;Fourthly,the combination of theoretical teaching and experimentation emphasizes students' sensory experiences and mobilizes students' enthusiasm;Fifthly,multiple teaching strategies should be designed to make the abstract theory more concrete and intuitive;sixthly,building a knowledge system and reviewing them regularly.Students can better understand knowledge and then form a micro-concept through quizzes.Finally,the paper has designed teaching cases about micro-concept based on the author's theoretical study,literature analysis and teaching practice in the process of pursuing graduate education,hoping to help junior chemistry teaching.