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1、Section C . Material analysis 本课是第二单元第二话题的第三课时，主活动是 1a 和 3。通过阅读 1a，进一步学习各种污染对地球造成的危害和造成这些污染 的原因，培养学生通过图片预测文章大意的能力，其中出现了很多关于环境的专业术语，需要学生了解。1b 是训练学生运用不同的 阅读策略完成不同的任务，如：通过观察 1a 中的图片匹配相应的标题，再阅读文章，给每段话选择标题；另外，继续训练学生通过 语境，找出单词指代的内容；最后在理解课文的前提下，归纳文章的大意。1c 培养学生通过精读文章，学会用简单的词句做笔记， 再通过 1c 表格中的内容简要复述文章大意。2 是培养
2、学生的资源策略。要求学生合理地运用网络资源查找与环境危害相关的信息， 然后进行小组讨论，并要求学生做好笔记，为任务 3 做准备。3 要求学生运用这些信息，在 1c 和 2 的基础之上进行写作练习，教师 应强调衔接词在作文中的重要性。由于课堂上不方便完成 2，因此，可将 2 和 3 安排为课后作业。通过读写的结合训练，引导学生关 注全球环境的现状，意识到环境保护的重要性，树立正确的环保观念。 .Teaching aims 1.Knowledge aims： 掌握本课的重点词汇和短语，初步感知定语从句。 进一步学习各种污染对地球造成的危害和造成这些污染的原因。 2.Skill aims: 能读懂有
3、关环境问题的文章。 能根据不同的阅读目的，运用简单的阅读策略获取信息。 能正确运用网络资源获取需要的信息。 能用英语书面的形式表达环境问题的成因及危害。 3.Emotional aims: (optional) 通过学习，了解环境现状，帮助学生树立绿色环保意识。 4.Culture awareness: (optional) 了解各种环境问题，如臭氧空洞，温室效应等，意识到环境问题的严峻形势。 . The key points and difficult points 1. Key points: Words and phrases: hole, form, rise, oxygen, ozo
4、ne layer, radiation, directly, carbon dioxide, blanket, escape, the greenhouse effect, refer during this period, take away, pass through Sentences: (1) Forests have become deserts, so more and more sorts of animals and plants are disappearing. (2) As a result, many rivers and lakes are now dead. (3)
5、 Too much harmful radiation from the sun passes through the hole and reaches the earth directly. (4) It causes the level of the oceans to rise and the climate of the earth to change. (5) When it rains or when the wind blows, the earth is taken away. (6) The heat from the sun cant escape, so the temp
6、erature is rising. Grammar: indefinite pronoun and adverb 2. Difficult points： 理解有关环境方面的专业术语。 能读懂与环境问题相关的科普类文章。 能运用所学知识，写出谈论环境现状的文章。 . Learning strategies 能在阅读不同体裁的材料时，运用不同的阅读策略获取信息。 善于利用插图预测科普类文章的内容。 能合理运用网络资源，拓展写作思路和开拓视野。 恰当使用连接词，使自己的作文流畅，有逻辑层次。 . Teaching aids 与环境相关的图片；单词卡片（如 O2/ oxygen; ozone la
7、yer; radiation 等） ；录音机；国际臭氧层保护日宣传动画片等。 . Teaching procedures Stage (time period) Interaction patterns Teacher activityStudent activityRemarks 1 Getting students ready for learning and revision （2 mins） Class activity Check the Ss homework: Let the Ss give a report about their own bad habits and how
8、to make the campus better. T: Hi, everyone. Last class, we have talked something about the school environment. Some of us may have some bad habits, and these habits can affect our campus. What can you do to make our campus look better? Please share your opinions with us. S1: I often forget to turn o
9、ff the lights when I leave the classroom. I think it doesnt matter if the lights are on for a little while. And I often waste some paper after I only use a small part of it. I like to use new paper. But now I realize these habits are really bad ones, so I hope every one of us can save energy from no
10、w on. T: Very good. If you can give more suggestions, it will be better. Next one. S2: I always make loud noise between Give a report about your own bad habits and how to make the campus look better. S1: I often forget to turn off the lights when I leave the classroom. I think it doesnt matter if th
11、e lights are on for a little while. And I often waste some paper after I use only a small part of it. I like to use new paper. I hope every one of us can save energy from now on. S2: I always make loud noise 用报告的形式让学生在课 堂上反思自己平时的言行， 有助于学生更好提升自己， 培养“爱护环境从我做起， 从小事做起”的意识。 classes. It disturbs others. I
12、 often throw rubbish around in a corner if there is nobody. But from now on, I will remember to get rid of the bad habits. If everyone can follow the school rules, our campus will become more beautiful. S3: T: Great. between classes. It disturbs others. I often throw rubbish around in a corner if th
13、ere is nobody. But from now on, I will remember to get rid of the bad habits. If everyone can follow the school rules, our campus will become more beautiful. S3: 2 Lead-in (3 mins) Class activity Play the cartoon video about protecting the ozone layer. Let the Ss watch and discuss what they have lea
14、rnt from it. Take some notes if necessary. T: Here is a video about protecting the ozone layer. Lets watch it carefully. Then I will ask you something about it. . T: Now Lets figure out something about ozone layer. Is ozone layer important or unimportant? Watch the video and discuss what they have l
15、earnt from it. Take some notes. 通过播放视频，让学生了 解每年的 9 月 16 日是国 际臭氧层保护日，关注臭 氧层的现状。 该宣传片是卡通版，不是 枯燥的科教片，能够很好 地吸引学生的注意力。如 果条件不允许，教师可以 从课外书籍上选读一些与 环境相关的文章。 Ss: Its very important T: Can the ozone layer protect us? Ss: Yes. T: What happened to it now? Ss: There is a big hole in the ozone layer. T: Yes. Whats
16、 the effect of it? Ss: Its harmful to all the living things, especially to humans for it does harm to our eyes and skin. Ss: Its very important Ss: Yes. Ss: There is a big hole in the ozone layer. Ss: Its harmful to all the living things, especially to humans for it does harm to our eyes and skin. 3 Pre-reading (5 mins) Class activity Step 1: Show two pictures of ozone layer and more carbon dioxide. Introduce them to the Ss briefly to teach the new words. T: Right
