| 1. | Firstly , teachers should diagnose the students " chemical pre - scientific conceptions . secondly , in order to elicit cognitive conflicts teachers could set up problem context . thirdly , students restructure own understanding
要求教师要重视学生已有的的科学概念，选择合适的教学策略，详尽阐述和说明化学概念，发展学生的个人认识，从而达到对化学概念的真正理解。 |
