仁愛英語九年級上冊U2T2SC的教學(xué)設(shè)計

1、Unit 2 Saving the EarthTopic 2 All these problems are very serious. Section CThe main activity is 1a. 本課重點活動是1a。. Teaching aims and demands 教學(xué)目標(biāo)1. Learn some new words and phrases:on earth, period, millions of, take away, rise, level, refer to2. Learn some useful sentences: (1) When it rains or when

2、 the wind blows, the earth is taken away. (2) The heat from the sun cant escape so the temperature is rising.3. Learn to talk about the harm of pollution:(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、. (3) 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.4. Develop the students sense of environmental protection. . Teaching aids 教具圖片/小黑板. Five-finger Teaching Plan 五指教

4、學(xué)方案Step 1 Review 第一步 復(fù)習(xí)(時間:4分鐘)通過檢查作業(yè)，引導(dǎo)學(xué)生開拓思維，提出保護(hù)環(huán)境和水資源的具體措施，復(fù)習(xí)不定代詞和副詞。為學(xué)習(xí)新詞匯作準(zhǔn)備。(檢查作業(yè)，并找學(xué)生匯報結(jié)果，引導(dǎo)學(xué)生如何保護(hù)水資源。)T:How do you protect our environment and save water?S1:Everyone should plant more trees.S2:We should do everything we can to save water.S3:Everybody should know the importance of forests.S4

5、:Pass laws against water pollution.S5:Collect and reuse waste water.Step 2 Presentation 第二步 呈現(xiàn)(時間:18分鐘)教師通過日常對話，借助1a中的圖片，創(chuàng)設(shè)情景，導(dǎo)入新課，呈現(xiàn)新的詞匯。1. (教師由日常對話，引出本課話題，呈現(xiàn)部分新詞匯。)T:Whats the weather like today?Ss: Its T:As we know, Beijing often has sandstorms in spring. What causes the bad weather?Ss:Cutting do

6、wn too many trees. (展示1a第二幅圖畫。)T:Yes. All over the world, people have cut down millions of trees. And trees become fewer and fewer.(板書并要求學(xué)生掌握。) millions ofT:Cutting down too many trees causes the bad weather. How can trees affect the weather?S1:They can keep water from running away. S2:They can stop

7、 S3:T:Yes. Trees can stop the wind and water from taking the earth away.(板書并要求學(xué)生掌握。)Take awayT:Anything else?Ss:(允許學(xué)生用漢語回答。)樹能吸收二氧化碳并釋放氧氣。T:Thats right. Trees can breathe in carbon dioxide and breathe out oxygen. (板書并要求學(xué)生理解。)carbon dioxide: CO2oxygen: O2T:Where does CO2 come from?S4:Animals breathin

8、g.S5:Burning oil. For example, cars and buses.T:Yes. They have polluted the air. Carbon dioxide in the air has increased a lot. This has formed a “blanket” around the earth.(展示1a第五幅圖。)Please look at the picture. (板書并要求學(xué)生理解。)blanketT:The heat from the sun cant escape, so the temperature is rising.(板書

9、并要求學(xué)生掌握rise；理解escape。) escaperiseT:This is called “the greenhouse effect”.(板書并要求學(xué)生理解。) the greenhouse effectT:Because of the greenhouse effect, what happens to the icebergs(冰川)?Ss:Some parts of them change into water.T:So it causes the level of the oceans to rise.(板書并要求學(xué)生掌握。) levelT:(展示1a第4幅圖。)Pleas

10、e look at this picture. Around the earth, theres a special kind of oxygen called “ozone”.(板書并要求學(xué)生理解。) ozone: O3T:But now air pollution is destroying it and that has made a very big hole in the ozone layer.(板書并要求學(xué)生理解。) ozone layerT:Too much harmful radiation from the sun passes through the hole and r

11、eaches the earth.(板書并要求學(xué)生理解。) radiation2. (讓學(xué)生快速閱讀1a，用所給的詞組填空。完成1a。) T: We humans have lived on earth for only 35 000 years, but during this period we have changed our planet a lot in many ways. Now read the passage and then choose a suitable title for each paragraph. (板書并要求學(xué)生掌握。)on earth, period(學(xué)生

12、完成后與教師核對答案。)3. (教師出示小黑板上的問題，讓學(xué)生再讀一遍課文后回答。)(1) Have we changed our planet in many ways?(2) Have people done good to the earth?(3) Why are more and more sorts of animals and plants disappearing?(4) Are many rivers and lakes dead now?(5) Is ozone important to the earth? Why?(6) Has carbon dioxide in th

13、e air increased a lot?(讓個別學(xué)生回答，完成小黑板上的問題。)Step 3 Consolidation 第三步 鞏固(時間:8分鐘)讓學(xué)生再次讀1a，完成1b，鞏固本課的語言點，培養(yǎng)學(xué)生的閱讀能力。1. (讓學(xué)生再次讀課文，完成1b。)T: Read the passage again. Finish 1b alone. (板書并讓學(xué)生猜測Mars和refer to的漢語意思。掌握refer to；了解Mars。) Marsrefer to(學(xué)生完成后，師生核對答案。)2. (放錄音，學(xué)生跟讀課文。)T: Now follow the tape to read the p

14、assage.3. (教師讓學(xué)生討論并找出新的或不懂的語言點，培養(yǎng)學(xué)生的自主學(xué)習(xí)能力。教師解釋學(xué)生仍有疑惑的知識點并板書。)4. (讓學(xué)生兩人一組討論，完成下面的表格。)T: How many kinds of pollution are mentioned in the passage? How do they affect our environment? According to 1a, finish the form on the blackboard. (板書)Kind of pollutionEffectStep 4 Practice 第四步 練習(xí)(時間:10分鐘)使學(xué)生了解各種污

15、染對地球環(huán)境的影響，培養(yǎng)他們的環(huán)保意識。1. (讓學(xué)生分組討論，看哪組最快說出O3，CO2和溫室效應(yīng)的含義及其對環(huán)境的影響，并以此寫一篇短文，完成2。) T: Please read the passage again, discuss the meanings of the following expressions in 2 in groups of 4, and then write down how they affect the environment.(學(xué)生討論后，與教師核對答案。)2. (根據(jù)給出的提示詞寫一篇小短文，可先口述。)T: Write a short passage

16、with the key words given.(板書關(guān)鍵詞。)(1)changein many ways(2)important, destroy, too much, harmful radiation, cause cancer(3)increase a lot, blanket, rise, change(4)serious, do somethingStep 5 Project 第五步 綜合探究活動(時間:5分鐘)讓學(xué)生討論各種危害地球的污染方式，并就有關(guān)污染寫一篇短文，培養(yǎng)學(xué)生綜合運用語言的能力，增強(qiáng)學(xué)生的環(huán)保意識。1. (到目前為止，污染危害地球的方式已基本介紹完畢，可以讓學(xué)生

17、做專題討論，以培養(yǎng)他們的綜合語言運用能力。在此過程中，鼓勵學(xué)生大膽發(fā)揮，做最大程度的拓展性討論。最后通過匯報，教師檢驗活動成果。)T: OK, until now, we have learned so many kinds of pollution. Now please work in groups and discuss them. After a moment, Ill ask some students to report it. 2. Homework:Write an article about the pollution. 板書設(shè)計：All these problems are very serious. Section Cmillions of When it rains