Junior Mechanics Teaching For Conceptual Change Strategy Research

Before students begin learning physics, they already have certain cognitive model which based on experience ,that is preconception, preconception is the precious treasure of students, valuable tools of explaining and understanding some phenomenon and the materials for their further study. If the preconception is true, it will be the foundation for students to get knowledge. But if it 's wrong, and do not be corrected in time, it will affect students to grasp the physical knowledge. Even, it will be the handicap for learning physics. Thus, all the teachers should pay attention to the switch of conception.Firstly, I tested on nearly 300 students of grade two and grade three in junior middle school. And examined the universal preconception on mechanics among junior middle school students of our areas. Then I drew the research achievement of people of former times. Under the direction of construction and be enlightened by the idea of stochastic teaching, I put forward the idea of switching conception, create conditions for variety switches of conception: inspire their cognitive desire by making students explain some physical phenomenon and conflicting matters. Aim at the origin of the false preconception, I used many ways to switch the conception ,such as experiments, analogy and so on. I adopt practical task in different situations to switch further. I use the corporation in study, discussion and communion to advance the switch of conception. Develop the understanding by self-examination. Make sure the durability of the switch. Adjust the element inside: during the switch, we must create an initiative atmosphere in the class. Besides, we should also pay attention to the unintelligent element, especially the emotion. And I compared experimental class with contrast class , proved that my idea has distinct effect both in helping students establish correct physical conception and in keeping scientific conception.