三、教學過程 Activity 1：Reviewing the homework tasks 本活動旨在落實課時目標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. 【設計意圖】此活動是熱身環(huán)節(jié)，作為第一課時作業(yè)的展示，學生需要整合運用簡圖、語言、內(nèi)容與結(jié)構(gòu)進行簡單復述。作業(yè)1用展示各組最佳簡圖的方式，綜合訓練學生通過聽說讀看“畫”多輪活動，復現(xiàn)目標詞匯，熟悉使用英文表達溫室效應的原理，強化對全球變暖原因的深度理解。作業(yè)2用寫詞條的方式，綜合呈現(xiàn)各組對產(chǎn)生大量溫室氣體的使用化石燃料原因的搜集與整理，是對課文內(nèi)容的有效補充，并為后續(xù)活動3這一環(huán)節(jié)找出針對性的解決措施做好鋪墊。