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1、Unit 2 Saving the EarthTopic 2 All these problems are very serious.SectionBThe main activity is 1a. 本课重点活动是1a。. Teaching aims and demands 教学目标1. Learn some new words and phrases:sand, cut down, change into, prevent, prevent from, human being, although, law, turn off2. Learn some useful sentences: (1
2、) I couldnt see anything, and my face hurt while I was walking down the street just now. (2) Pass laws against water pollution. (3) Remember to turn the tap off when you leave.3. Continue to learn the indefinite pronoun and adverb.4. Learn to talk about pollution and its harm. Teaching aids 教具幻灯片/录音
3、机/图片. Five-finger Teaching Plan 五指教学方案Step 1 Review 第一步 复习(时间:5分钟)通过方格游戏，来复习不定代词和不定副词的用法。(让同桌两人做一个33的方格，将上节课Section A中2的10个不定代词(everyone和everybody任选其一)放入方格中。教师事先准备九道练习题，答案就是方格中的九个不定代词。教师将这些习题逐一呈现出来，同桌两人抢圈答案，谁抢到的多谁获胜。在此过程中，教师每呈现一题就要核对一次答案。)(供参考)(表格及习题如下：)noneothersomethingeveryone everybodynobodyanyt
4、hingeverywhereanybodyothers(1) None of us knows how to stop the bad behavior.(2) I knocked on the door but nobody answered.(3) Some of these books are better than others.(4) She was driving the car with one hand and wiping the window with the other.(5) Its a good car but I am looking for something f
5、aster.(6) You cant believe anything she says.(7) Therere 5 000 people living here and almost everyone/everybody has his/her own car.(8) Hes cleverer than anybody I know.(9) Ive looked everywhere but I cant find it.Step 2 Presentation 第二步 呈现(时间:15分钟)通过多媒体呈现1c中的图片，创造情景对话，呈现新单词和词组，学习1a。1. (呈现1c中的图片，学习新
6、词汇。)T:Look at these pictures then tell me your feelings. First look at Picture 2.T:(指着第二幅图。) Is the scenery beautiful?Ss:Yes.T:OK. Lets look at Picture 4. Is it beautiful?Ss:No.T:What has happened to the forest?Ss:It has gone.T:Yes. People have cut down too many trees.(板书并要求学生掌握。)cut downT:Please lo
7、ok at Picture 1. A lot of earth has been washed away. Why?Ss:Because people have cut down (教师引导学生回答。)T:Thats right. Trees can prevent the water from washing the earth away.(板书并要求学生掌握。) preventfrom=stopfromT:Lets look at Picture 3. Oh, my goodness! The forest has changed into desert.(板书并要求学生掌握短语chang
8、e into；理解desert。) change intodesertT:Please look at Picture 5. Whats the weather like?Ss:Its bad.T:Yes. The wind is blowing strongly with lots of sand. We call it sandstorm.(板书并要求学生掌握sand；了解sandstorm。)sandsandstormT:Is cutting down trees good or bad for us?Ss:Its bad.T:Yes. Its harmful not only to h
9、uman beings, but also to animals and plants.(板书并要求学生理解。) human beingT:So what can we do to protect the environment? Discuss in groups of four.(给学生两分钟，让他们讨论。)S1:Plant more trees.S2:Stop cutting down trees.S3:T:Good idea. Although we have done a lot to protect the environment, its still not enough. Le
10、ts work harder.(板书并要求学生掌握。) although2. (让学生小组讨论完成1c。)T: Do you know the relations between trees, human beings and sandstorms? Do you know how sandstorms come into being? Now please look at the pictures in 1c and number them. (核对答案。)3. (听1a录音回答问题。)T:Just now we talked about how sandstorms come into b
11、eing. Now listen to 1a, and answer the questions on the blackboard. (板书)(1) Whats the weather like today?(2) What should we do to protect the environment? (核对答案。)4. (让学生分成小组，读1a，提出不懂之处。小组内讨论，解决各自提出的问题；最后全班共同讨论，解决遗留问题。用此方式可以让学生充分参与到教学过程中来，进行自主探究学习，教师做补充讲解。) T: OK, please work in groups. Find and talk
12、 about the language points and difficult points, then Ill ask some students to give their answers to class. Step 3 Consolidation 第三步 巩固(时间:8分钟)教师放1a录音，学生表演朗读，完成1b。让学生明白树木在环境保护中的重要性，增强环保意识。1. (让学生跟读1a录音，并注意语音语调。)T:Now, please read after the tape. Pay attention to the pronunciation and intonation. 2.
13、(让学生三人一组表演这个对话，稍后检查活动成果。)T:Please work in groups of three. After a while, Ill ask several groups to act out this dialog. G1: G2: 3. (让学生看1b的图片，完成1b。)T:Lets look at the picture in 1b. Make notes of trees functions according to 1a by yourselves. (学生完成后，让学生一个接一个地把答案读出来。)T:Please read your notes one by
14、one. S1:Step 4 Practice 第四步 练习(时间:10分钟)教师展示一幅水被污染的图片，呈现2中的新词汇。让学生懂得怎样保护和节约水资源。1. T:Now we know that a lot of water can be saved by forests. Why should we save water?Ss:Because it is very important.T:Thats right. Without water, well die. So we should protect water.(展示一条被工厂污染的河的图片，引出2中的新词汇。)T:Look at
15、the picture. Can people drink the water in the river?Ss:No.T:Why?Ss:Because the water is too dirty.T:What causes it?Ss:Factories are pouring waste water into the river.T:Yes. What can we do to stop it?S1:Pull down the factories.S2:Write to the newspaper.S3:T:Yes. We can stop factories pouring waste water into rivers by cutting off their water supply. And we can also pass laws against it.(板书并要求学生掌握。) law T: What other ways of protecting and saving water
