初中科学教材中有大量的“阅读”、“小资料”、“思考与讨论”、“视窗”和“科学技术社会”内容,形式生动活泼,涉及的知识面十分广泛,但是许多知识点只是点到为止,在科学的课堂教学中如何适当地展开,就要合理地兼顾提高课堂效益和培养学生的 There are a lot of “junior high school science textbooks,” “reading”, “little information”, “thinking and discussion”, “window” and “science and technology society” content, form lively, involved knowledge However, many knowledge points are just a few words, so how to expand properly in science classroom teaching should take reasonable consideration to improve classroom efficiency and students’