Learning Progression Research On Ion Reaction Of High School Chemistry

This paper focuses on a core concept of high school chemistry--Ion reaction.Ion reaction is the core knowledge of high school chemistry,throughout the high school textbooks always,and is also a hot spot for college entrance examination over the years.In order to describe students ion reaction conditions,using the method of literature research method,model method,interview method and investigation method,summarized the previous research results of learing progressions,covered by combing the high school stage ion reaction,and it can be divided into four types and five levels,through the questionnaire,more than and 200 from the Shijiazhuang city high school three grade students on the level of understanding of the ion reaction test,the establishment of advanced core concept.Mainly do the following aspects of work.First,literature review and concept definition.Foreign literature review with time as the main line,in the past ten years of advanced literature briefly;domestic literature from learning the definition,theoretical foundation,composed of six elements,characteristics,mode,research trends of interpretation.After several of the core concepts involved in the study of ion reaction,the definition of learning.Based on the model,the characteristics and disciplines of chemistry thought under the idea of constructing "advanced ion reaction" model.Based on the model,the representative and core topic questionnaire was selected.The statistics of questionnaire data,try to describe ion reaction knowledge of high school students.The actual situation of students objectively and intuitively reflected,and the statistical results of the data to give a reasonable explanation.Finally,on the basis of the above conclusions,review the whole process of reflection.