1、教学目标：1.能听、说、读、写本课的核心词汇：air, everywhere , alive, smoke,factory, smoke, dirty, clean, plant2.能熟练掌握核心句型： It keeps them high in the sky.3.读懂描述空气污染的对话。重点难点：1.能在语境中正确使用本单元的核心词汇。2.能用句型It keeps them high in the sky.描述空气的作用。教学用具：录音机、自制课件、照片等教学过程：StepWarm up and revision（热身与复习）1.Greetings.2.Guessing game.Step
2、 Presentation and practice （自主探究）1.生词关T: Please write the meanings on your paperair_ smoke _ factory _ dirty_ clean _alive _ everywhere_ important _2.Learn the new words.T: Lets listen and say the new words.Ss: read these words after teacher.3.Work in groups to read the new words. Recite the new wor
3、ds, and then recite in groups。4.Watch the screen and learn to say the sentences.5.Ask pupils to talk about the famous cities of the world in groups .Sept Learn the story （文本学习）T: Heres a riddle. Its very long one. Please listen carefully and guess what it is. What is it?Ss: Air.T: Yes, What do you t
4、hink of air?S1: Air has no colour.S2: Air has no smell and taste.S3: T: Yes. We cant see it,but we can feel it. Air is important toall living things.T: Can you talk about air? Work in groups .Ss: talk each other.Tasks the pupils to answer the questions on Page 69.Step Consolidation（拓展延伸）Think and say: 模仿课文，介绍一样。教学反思：大部分学生能掌握本课的核心词汇和核心句型，小组讨论，谈一谈对空气的认识，学生积极踊跃，大胆表达，教学效果较好。
