Research On The Improvement Of The Teaching Of Chemistry Particle Concept In The Rural Junior Middle School

The basic characteristic of chemistry is that microscopically investigate compose of materials and understand essence of materials change.After understand microscopic structure of material,we know the diversity and uniformity and we understand objectivity and complexity.Then,we can form basic concept of chemistry,especially for micro-concept.Micro-concept related contents are abstract and applicable and they has key impacts on entire study procedures of chemistry.So students may feel difficulty,especially students come from country.They may be no good at abstract logic.Their study motivation may be not high.They may not work hard for study.All of these things cause the first big differentiation.This paper studied on the basic contents of micro-concept in junior middle school. This paper analyzed the first and second textbooks of chemistry for junior middle school published by People’s Education Press in detail.This paper pointed out the specific feature of these textbooks by integrating the basic contents of micro-concept. According to questionnaire from students,this paper found the knowledge of students for micro-concept before they study it.This paper also found the solution and key for teaching.Besides,this paper interviewed teachers in different teaching experiences and collected their teaching approaches,strategies and confusions.According to the author’s teaching experiences,the author proposed teaching strategies to help students to study micro-concept: one is to understand the students cognitive level,do the convergence of old and new knowledge according to students’ cognitive rules;two is the analysis of overall grasp of the material,according to the arrangement characteristics of materials particle concept,planning teaching content;three is starting from the students’ daily life and experience,create a vivid learning environment,stimulate interest in learning;the four is to do chemical experiments,pay attention to students’ visual experience,to stimulate interest in learning;five is the use of a variety of teaching methods,make the knowledge visualization,visualization,cognitive breakthrough difficulty;six is the construction of knowledge the network diagram timely summarized review,by means of small tests to help students internalize knowledge,promote the construction of the micro view.Finally,this paper provided a reference for other teachers in the country according to the author’s theoretical knowledge and research experiences obtained during studies for the master degree and case studies of micro-concept used for teaching.