1、Unit 2 Topic 2 Section B程 婧  The main activity is 1a.Teaching aims and demands1. New words and phrases:sand, cut down, change into, prevent, prevent from, human being, although, law, turn off2. Useful sentences:  (1) trees can stop the wind from blowing the earth away.  (2) pass laws

2、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 :               tape  picturesTe

3、aching planStep 1 Review通過方格游戲，來復習不定代詞和不定副詞的用法。(讓同桌兩人做一個3×3的方格，將上節課section a中2的10個不定代詞(everyone和everybody任選其一)放入方格中。教師事先準備九道練習題，答案就是方格中的九個不定代詞。教師將這些習題逐一呈現出來，同桌兩人搶圈答案，誰搶到的多誰獲勝。在此過程中，教師每呈現一題核對一次答案。)(供參考)(表格及習題如下：) noneothersomethingeveryone everybodynobodyanythingeverywhereanybodyothers

4、(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) They are beautiful but i am looking for something useful.(6)You cant believ

5、e 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通過多媒體呈現1c中的圖片，創造情景對話，呈現新單詞和詞組，學習1a。1. (呈現1c中的圖片，學習新詞匯。)T:   Look at picture 2

6、in 1c.T:   (指著第二幅圖。)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.(板書并要求學生掌握。) cut downT:   Please look

7、at picture 1. A lot of earth has been washed away. why?Ss: Because people have cut down (教師引導學生回答。)T:   Thats right. Trees can prevent the water from washing the earth away.(板書并要求學生掌握。) preventfrom=stopfromT:  Lets look at picture 3. Oh, my goodness!The forest has changed in

8、to desert.(板書并要求學生掌握短語change into；理解desert。) change intodesertT:   Pease look at picture 5. Whats the weather like?Ss: Its bad.T:  I agree with you. The wind is blowing strongly with lots of sand. We call it sandstorm.(板書并要求學生掌握sand；了解sandstorm。) sandsandstormT: &#

9、160; Is cutting down trees good or bad for us?Ss: Its bad.T:   Very good.Its harmful not only to human beings, but also to animals and plants.(板書并要求學生理解。) human beingT:   So what can we do to protect the environment? Discuss in groups of four.(給學生兩分鐘，讓他們討論。)S1: Plant more tr

10、ees.S2: Stop cutting down trees.S3: T:   Good idea. Although we have done a lot to protect the environment, its not enough yet. lets work harder.(板書并要求學生掌握。) although2. (讓學生小組討論完成1c。)T: Do you know the relations between trees, human beings and sandstorms? Do you know how sandstorms co

11、me into being? Now please look at the pictures in 1c and number them.  (核對答案。)3. (聽1a錄音回答問題。)T:  Just now we talked about how sandstorms come into being. now listen to 1a, and answer the questions on the blackboard.(板書) (1) Whats the weather like today?(2) What should we do to pr

12、otect the environment?  (核對答案。)4. (讓學生分成小組，讀1a，提出不懂之處。小組內討論，解決各自提出的問題；最后全班共同討論，解決遺留問題。用此方式可以讓學生充分參與到教學過程中來，進行自主探究學習，教師做補充講解。)T: Ok, please work in groups. find and talk about the language points and difficult points, then Ill ask some students to give their answers to the class.Step 3 Cons

13、olidation教師放1a錄音，學生表演朗讀，完成1b。讓學生明白樹木在環境保護中的重要性，增強環保意識。1. (讓學生跟讀1a錄音，并注意語音語調。)T:    Now, please read after the tape. pay attention to the pronunciation and intonation.2. (讓學生三人一組表演這個對話，稍后檢查活動成果。)T:     Please work in groups of three. after a while, ill ask seve

14、ral groups to act out this dialog.S1: S2: 3. (讓學生看1b的圖片，完成1b。)S: Lets look at the picture in 1b. make notes of trees functions according to 1a by yourselves.(學生完成后，讓學生一個接一個地把答案讀出來。)T: Please read your notes one by one.S1: Step 4  Practice教師展示一幅水被污染的圖片，呈現2中的新詞匯。讓學生懂得怎樣保護和節約水資源。1.T: Now

15、 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.We cant live without water. so we should protect water.(展示一條被工廠污染的河的圖片，引出2中的新詞匯。)T: Look at the picture. Can people drink the water in the river?Ss:  

16、60; No.T: Why?Ss:    Because the water is too dirty.T: What causes it?Ss:     Factories are pouring waste water into the river.T: Good. What can we do to stop it?S1:      Pull down the factories.S2:   

17、0;  Write to the newspaper or the government.S3:       T:  Very good. We can stop factories pouring waste water into rivers by cutting off their water supply. And we can also pass laws against it.(板書并要求學生掌握。) law T: Do you know some other ways o

18、f protecting and saving water? For example, remember to turn the tap off when you leave. (板書turn off，要求學生掌握；板書tap，要求學生理解。) tapturn off      turn on2. T: Now, read 2 and discuss in groups of four.(小組代表報告，教師板書總結。)Step 5  Project綜合運用本課的語言項目，探討水資源保護的相關問題；課后寫一篇有關“保

19、護和節約水資源”的短文，進一步增強學生的環保意識。1. (讓學生討論如下問題，為寫作做準備。)T: Ok. we know water is very important to human beings. Now please talk about the following questions:(1) Why should we save water?(2) Whats the importance of water?(3) How should we save water?(討論完后匯報結果。教師將關鍵詞板書，以利于學生寫作。)2. Homework:(1) Find out more i

20、nformation about water.(2) Write a short passage with the title “protecting and saving water”.板書設計： all these problems are very serious.section bcut down                                 prevent from =stop from change into desert