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1、1Unit5 The power of natureIII教材分析本单元以 the power of nature 为话题，旨在通过本单元教学使学生了解火山爆发，地震，台风，洪水，海啸等自然现象，认识到自然的伟大力量，并会用所学词汇描述在经历自然灾害时的感受，思考人类应对自然灾害的态度和方法，提高自我保护意识。Warming up 通过对火山爆发示意图的探讨激活学生了解与本单元话题相关的背景知识，而后通过讨论人类应对自然灾害的措施引发学生对本单元话题的思考，激发学生的求知欲，为随后进行的听说读写打下基础。Pre-reading 通过回答问题测试自己是否适合作火山学家，让学生了解这一陌生职业，为
2、阅读做好准备。Reading 部分一味火山学家以第一人称的形式讲述了自己的工作及第一次目睹火山爆发时的情景和心情，描写了人与自然的斗争与和谐相处的乐趣，使学生认识到火山是美丽的，但同时极具破坏力，而火山学家的工作可以减少由火山引发的损失。Comprehending 设计了两种题型：第一题要求学生在阅读后发表对火山学家这一职业的看法；第二题检测学生对文章细节的理解。Learning about language 分为词汇和语法两部分。词汇部分着重从词的意义用法和表达方面对学生学习词汇给予指导；语法部分学习-ing 形式在句子中作状语表原因，时间及结果。Using language 以语言实践为目
3、的，包括四个部分的内容。Listening 三位火山学家讲述了他们各自最惊险的一次经历。学生在练习听力的同时学会描述害怕和紧张的词汇。Speaking 是 listening 的延续。要求学生讲述自己类似的经历，同时在运用中巩固单词。Reading 介绍了旅游胜地 the lake of heaven， 培养学生快速获取信息的能力。Reading 与 writing 属于同一话题，要求根据所给信息写一篇介绍 hot springs 的作文。Sunning up 部分要求学生就火山，火山学家，天池，本单元词语，-ing 形式2和表达情感的日常交际用语等方面进行自我评价，判定呢感学习情况。 lea
4、rning tip 部分介绍单词记忆方法：利用构词法或话题分类记忆单词；利用图表，图片等记忆单词；随身携带生词本；多说多写。IV分课时教案( 多媒体教学 )The first period Warming up and pre-reading1. Warming upIn order to talk about what volcanoes are and how they are formed, students need to learn some new words: lava erupt/eruption crater active/dormant/extinct volcanoes
5、1) Show some pictures of disasters .Ask student to name disasters as much as they know.Sample answer: cyclone typhoon Hurricane tornado snowstorm landslide Volcano tsunami earthquake flood hailstorm sandstorm2) Ask them What they feel when they see the power of nature showing in the pictures:Have yo
6、u ever experienced one ?Share you experience and feelings ? (were you frightened and how frightened were you?)Some expressions tips: scared to death, frightened , worried, unforgettable , unbelievable3) Have you ever seen a volcano ?Ask Ss to complete exercise 1 in groups. Then check their answers o
7、rally as a whole class.Ask students to help you make a list of words connected with volcanoesDiscuss with students where in the world active and extinct volcanoes occur.2. pre-reading 31) Can you tell me who will climb into a live volcano in order to take the temperature of the boiling rock inside ?
8、volcanologistsdo they take up a crazy job?2) get the students to answer the six questions in pre-reading to find out whether they will enjoy working as a volcanologist.Students could do this activity as a survey by asking others in their class these questions Or they could do it individually. 3) aft
9、er they have completed the task, survey the class to find out how many might enjoy the work of a volcanologist.The second period Reading and comprehending1.First readingSkinning & skimming1)Ask students to read through the passage quickly to get a main idea ofthe whole passage. Give them a limited t
10、ime to read the whole passagein order to encourage them to practice reading for general ideas and to discourage them from reading word by wordmain idea: This passage is a first-person account of a volcanologists experiences. The volcanologist described his exciting job and wrote down his first sight
11、 of an eruption.What does a volcanologist do ?( answer in the text )Then let students do the multiple-choices (见课件)2)Set Exercise 1 in “comprehending” either as a group or whole-class activity. Explain to students that the purpose of questions like these is to help them develop skills of evaluating
12、a text. 2.Second reading (intensive reading)Before reading, glance through Exercise 2 on Page35.Choose some to ask them and check their answers:41). Why is a volcanologists job important ?Volcanologists study volcanoes so that they can warn people when the volcanois going to erupt and so save many l
13、ives.2). Why is the lava that flows on Mount Kilauea more dangerous than the actual eruption ?The lava flows down the mountain and can cover up or burn villages in its path. the rocks that erupt from the volcano usually dont damage anything because no one lives the crater.3). Why was it difficult fo
14、r the writer to walk towards the edge of the crater ?The author was wearing special protective clothing that made it difficultto walk.4). What does the writer find impressive about volcanoes even after studying them for 20 years ?The author is impressed by the beauty of the eruption and also by its
15、potential to cause great destruction.3.Third reading (Read again to find more details) 1).what made the author realize that an eruption occurred ?answer: my bed began shakinga strange soundmy bedroom became as bright as dayan absolutely fantastic sightred hot lava was containing hundreds of metres i
16、nto the air 2).what did the scientists do after the eruption ?answer: put on white protective suits, helmets, big bootsdropped as closed as possible to the craterslowly make our way to the edge of the craterlooked down into the red boiling centerHomework5Spend some time researching one disaster. You can use books, magazines, newspapers or the Internet. Collect pictures and diagram and look for information about: what causes this kind of disa
