Research On Teaching Practice Of Chemical Theoretical Knowledge Based On "Concept Construction"

Along with the technological developing,the trend of science education reform gradually tends to improve students' conceptual literacy.The purpose of this topic is to solve the current situation that most chemistry teachers in China only require students to master the core knowledge for the class goal,but have nothing to do with the five core accomplishment goals required by the new curriculum standard.Theoretical knowledge runs through middle school chemistry.The establishment of scientific concepts and the improvement of scientific practice skills of senior high school students cannot do without memorizing theoretical knowledge.In order to solve the existing problems,this research proposed a teaching strategy based on concept construction,and selected modules of theoretical knowledge of chemistry for design and practice.This paper expounds the application of chemical concept and concept construction in chemistry teaching,implements the infiltration of chemical basic concept in chemistry class,and promotes the establishment of students' scientific concept.Thus,it plays a vital role in teaching chemistry concepts to promote students' in-depth learning of chemical knowledge and improve students' thinking ability.This paper first analyzes the domestic and foreign famous scholars about the concept of constructing theory of related research,which found that famous British educator Erickson put forward the concept of curriculum teaching theory can give us some reference,but the starting point of the theory applied in the field of integrated curriculum,for subject-based curriculum in our country still needs further research and application.In China,Professor Wang Lei put forward the teaching mode based on concept construction,which mainly explains how to analyze and discuss the middle school chemistry textbook based on concept,but it still needs some practical reference for the implementation of concept construction in specific classroom teaching.Therefore,on the basis of educational theory,this paper designs a questionnaire about the basic concept of chemistry for the prediction of the first grade freshmen.According to the report of test paper that the most students are short of chemistry concept,the paper puts forward specific teaching strategies and design ideas for the teaching practice of concept construction.Choose chemistry theoretical knowledge required the quantity of a substance and ionic reaction in two classes for the study of the teaching content from two sides of the teaching design and concepts reflect design case,to Yu Yang district of Yulin city by the two classes of grade one middle schools teaching practice,the two classes of teaching practice is to develop students' particles,experiment,chemical changes,social values,Then a chapter test of the basic concepts of chemistry was designed to quantitatively analyze the teaching practice of the two classes.The studies indicates that the students have much imperfections in the understanding the concepts of chemistry.Especially in the implementation of scientific thinking,particle view and conservation view.The concept teaching of chemistry can be well resolved the teaching problems.It can not only promote students' in-depth understanding of the core knowledge of chemistry,but also promote students' scientific literacy and the construction of core concepts,which makes the chemistry teaching become regular.