Teaching Practice Research On Promoting The Understanding Of Junior Middle School Chemistry Subject Based On 3D Concept

In the course of classroom teaching reform,we always pay attention to promoting students' understanding of discipline understanding,the formation of discipline understanding is helpful for students to grasp subject knowledge,forming the subject thought,and acquiring discipline competence.3D learning(disciplinary core concepts,crosscutting concepts,and science and engineering practices)is proposed by the United States to promote understanding of science disciplines.These three dimensions include key competencies and qualities that promote student understanding,Conducive to students paying attention to a small but important core concept.The crosscutting concepts is to break through the boundaries of disciplines and to construct,deepen and apply the core knowledge and crosscutting concepts in science and engineering practice activities to promote the occurrence of meaningful learning and the establishment of a scientific worldview.Through the study and correlativity of chemistry course contents in 3D and compulsory education course standard((2011),this study defines the 3D learning mode suitable for our country's educational present situation,selects a secondary school in tianjin to integrate the 3D study into the actual teaching,then selects the contents involved in the subject of 3D,whether the students understand the subject through the 3D study.The results show that:many places in the course standard are related to the 3D learning concept,which shows that the study of 3D is closely related to chemistry teaching in junior high school,and provides important theoretical basis for the empirical study and practical teaching of chemistry teaching.The results show that the students of the experimental class better grasp the subject knowledge through the core concept,form the subject thought through the crosscutting concepts,and train the discipline ability through the scientific practice.