Study On The Teaching Of “metathesis Reactions” In Junior Chemistry

About the material, in order to know the basic characteristics of chemical change, understand the reaction phenomena and the nature of the contact. But of chemical reaction, change and abstract the chemical symbol of microscopic particles, the microscopic world involves not deep grade students, if can not macroscopic, microscopic and symbolic step by step three levels linked to know discipline knowledge, that students’ cognitive difficulties, the students cannot independent construction of chemical knowledge in the later study. Based on this, the author thinks that the teachers in the teaching, conscious, according to the steps and phases of trains the student to form the micro thinking mode, in a planned way of improve students “macro-micro-symbol” dimensional characterization thinking ability. On an intuitive to express the micro content of teaching, teachers can use teaching software simulation functions of macro phenomenon with micro animation to display, in order to help students to understand, and to gain insight, along with the students can participate in activities to mobilize students’ enthusiasm and interest in learning, to improve the efficiency of the classroom.This study focuses on "Metathesis Reactions" teaching present situation, the preliminary analysis main factors hindering the development of the students’ thinking in the teaching process. According to their own teaching experience, put forward in the process of deep excavation materials, adopting teaching strategies in stages, courseware can be combined with the phenomenon of macro and micro scene, helped by a gradual improve the level of students’ microscopic study, finally achieve to cultivate students "macro- micro- operator" triple characterization of the purpose of the mode of thinking.This study will discuss from the following six parts:The first part: Put forward the research background, purpose and significance, the reason, the first interview of several teachers and students the results of the questionnaire survey and analysis of Metathesis Reactions in the teaching of part teaching contents of the status quo and the students efficiently accept the cause of the relevant knowledge, and analyze the existing problems in the teachers’ teaching measures, combining literature research Angle and height is determined, the preliminary get students in learning, to the understanding of the standards required for Metathesis Reactions is put forward based on the information technology of Metathesis Reactions teaching significance.The second part: The theoretical basis and implementation plan, in combination with related literature on “macro-micro-symbol” dimensional characterization thinking ability, the analysis of the existing the level of student status, as well as improvement measures, and analyze Metathesis Reactions when teaching should adopt the teaching means and methods of interpretation teaching the meaning and importance of the content in stages.The third part: According to the students’ cognitive development and junior students should know micro level analysis, combined with the specific teaching content, interpretation of the Metathesis Reactions specific stages in the process of teaching and its teaching ideas, and demonstrate the teaching courseware used by each stage.The fourth part: Presents Metathesis Reactions content related to teaching design, the lack of teaching design and problem of teaching process should be paid attention to.The fifth part: analysis study results of Metathesis Reactions, including the student content knowledge in a pretest, and first-line teachers gave micro animation courseware system evaluation.The sixth part: Review and prospects of the research conclusions, comprehensive system of evaluation. This part introduces the limitations, the success, prospects of the study. Then it makes the research plan and methods on the future. Keywords Metathesis Reactions...