Teaching Research On Unit Of “Chemical Substances And Its Change” Based On The Concept Of Change

Before the learning of the scientific concepts,students already have certain understanding of the concept and knowledge of the learning materials,which is called pre-concept.There are a lot of former concepts,the scientific former concept will help students learn,however,unscientific will play the role of inhibition in students' study.Through the understanding of students' pre-concept,teachers can change their teaching methods and teaching plans.A survey about the “Chemical Substances and its Changes” is carried out by the researcher.This part plays an essential role in students' whole course in their high school.The mastery of scientific concept has a great effect on students' study in the future.The research questions are as follows:(1)What is the pre-concept of "Chemical Substances and its Changes" in students' minds before they learn the new knowledge.(2)How to make effective teaching about the conceptual change.(3)To change students' pre-concept of "Chemical Substance and its Changes".The process of this study are as follows: Firstly literature research.The researches of the Pre-concepts,Conceptual Transformation and “Chemical Substance and Their Changes” are summarized.Finding that in the part of the study,the practicing researches are not that much.Secondly questionnaire investigation.Before formal learning on students' prior knowledge and experience to investigate analysis,sums up the reasons causing of the pre-concept of student.Finally the practical study.The researcher did an experiment on S Class with the teaching methods of cognitive conflict teaching strategy,analogical teaching strategies and concept map teaching strategy.Through the comparison of the normal class and the experimental class,then make corresponding conclusions.Through the above research can safely draw the conclusion that:The pre-concepts of the students' mind are influenced by many factors,and it is complex.The student's former concept is stubborn,it heads the focus and change constantly.The conceptual change teaching strategy teaching result is superior to traditional teaching,it is helpful for students to understand the concept.Concept of the effective ways to change teaching for analysis before course standard,teaching contents and students' concept,based on the concept of transformation strategy for teaching design.