Junior High School Students About The "Acid" Before The Concept Of The Concept Of Exploration And Research Into Strategy

Numerous studies have demonstrated that make a systematic study on the chemical knowledge, most of the students in the mind have before the related concepts. In junior middle school chemistry teaching, more and more profound experience through class teaching make students understand the importance of chemical concepts correctly, if you don’t understand a student before the concept of teaching will lead to the students blindly and not in what you’ve got the cognitive basis of knowledge construction, unable to form a scientific system of chemical knowledge., therefore, to probe the student that exist in the mind before the relevant concepts, analyze its characteristics and causes, and on the basis of the implementation of the concept of effective transformation strategy study is very important.This study in junior high school students about the probe of the former concept of "acid" and concept transformation strategy as the research content, research mainly divided into the following five parts:The first part:the combined with the present status of the teaching, put forward the research background, the significance of interpretation, this topic, the research ideas and research methods.The second part:through the literature, the analysis of the current research situation of domestic and foreign students pre-concept, as well as the pre-concept and "concept transformation" definition.The third part:through the questionnaire and interview method, for a junior high school grade nine students, to probe the student concerned pre-concept of "acid", and analyzes the characteristics of pre-concept and the main reasons.The fourth part:the analysis of the students about "acid", on the basis of pre-concept in experimental classes to carry out the teaching concept transformation strategy, carry out routine teaching in that in comparative classes. Through the questionnaire and the analysis of experimental class and that in comparative classes investigation, survey concept transformation strategy of teaching effect.The fifth part:on the basis of above research, the research conclusions, some Suggestions on the teaching.The study of this paper is to probe into the students about pre-concept of "acid", on the basis of using the following concept transformation strategy:(1) the cognitive conflict strategy; (2) experiments to explore strategies; (3) cooperative learning strategy; (4) multimedia technology; (5) the application of concept map. Using the appropriate transformation of the concept of strategy, can better promote students’ former concept transformation.