1　设计思想研究性学习是培养学生在教师指导下 ,从自身的学习生活、自然界中选取研究专题 ,以探究的方式主动地获取知识、应用知识、解决问题的学习方式。研究性学习结合课堂教学开展是一种有效的方式 .本课的设计把学生看作是信息加工的主体、强调学习者的认知主体作用 ,同时 1 Design Ideas Research-based learning is to cultivate students under the guidance of their teachers, and to select research topics from their own learning and living and nature, and to actively acquire knowledge, apply knowledge, and solve problems in a way that explores. Research-based learning combined with classroom teaching is an effective way. The design of this lesson treats students as the main body of information processing, emphasizing the role of learners’ cognition, and at the same time