Promote The Teaching Practice Research Of The Construction Of The Chemical Change Concept Of Junior High School Students

The view of chemical change is one of the core concepts of chemistry. During the junior high school,it has a unified and lasting migration value for teachers to promote students to form the correct view of chemical changes,deeply understand the material and its chemical changes in the nature. This not only helps students to master the most valuable knowledge of chemistry but also form a corresponding framework of thinking as a result of providing students a understanding direction of chemical awareness.Thesis analyzes the researching results of opinions or concepts from home and abroad. It is based on the concept-based curriculum and teaching theory proposed by H. Lynn Erickson, an American curriculum expert. According to the concept of construction-oriented teaching theory proposed and connotation of chemical changes based on secondary high school stage proposed by professor Wang Lei, from Beijing Normal University. This paper first defined the "subject concept", "chemical changes".Then combined The Standards of Courses, the paper puts forward the connotation of the view of chemical changes which should be formed by junior high school students,and presents the teaching designing models to promote the construction of view of chemistry changes among junior high school students. Each part of the models and the relationship between them are also carried out in a detailed description.In this paper, I selected two topics, "Combustion and Fire Extinguishing" and"Chemical Properties of Metal" in the Chemistry Textbook of Junior Middle School,selected four classes from S junior high school in Nanjing as the research objects, and the teaching practice of promoting the construction of chemistry change view of junior high school students is carried out.Research indicates:1, junior high school students should be constructed chemical changes, including? material is changing; ? changes are regular; ? changes in the law is cognitive;? chemical changes are available.2, in the teaching design, the first need to clarify how the teaching content reflects the concept of chemical change; then through the analysis of students to determine the concept of students and the concept of the relationship between the concept; the final clear teaching objectives.3, in the implementation of teaching links, the need for situational design,problem design, student activity design, student reflection design, to promote students to gradually form a chemical change.4,through the promotion of junior high school students to change the construction of the concept of teaching, can help students build and develop the concept of chemical change.