新人教版高中英语选修3Unit 3 Environmental Protection教案（内容型）

三、教学过程 Activity 1：Reviewing the homework tasks 本活动旨在落实课时目标1。 Students work in groups to pick out the best diagram and the most frequently mentioned reasons. Then exchange and share ideas. 1. Group presentation: A diagram describing how the greenhouse effect works. Each group picks out the best diagram of its group. One member sticks it on the blackboard and gives a short explanation of how the greenhouse effect works. 2. Group presentation: Why do people burn fossil fuels? Each group picks out 3 most frequently mentioned reasons. Divide the reasons into different categories. 【设计意图】此活动是热身环节，作为第一课时作业的展示，学生需要整合运用简图、语言、内容与结构进行简单复述。作业1用展示各组最佳简图的方式，综合训练学生通过听说读看“画”多轮活动，复现目标词汇，熟悉使用英文表达温室效应的原理，强化对全球变暖原因的深度理解。作业2用写词条的方式，综合呈现各组对产生大量温室气体的使用化石燃料原因的搜集与整理，是对课文内容的有效补充，并为后续活动3这一环节找出针对性的解决措施做好铺垫。