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Section C The main activity is1a. 本课重点活动是1a。
Ⅰ. Teaching aims and demands 教学目标 1. Learn some new words and phrases:
on earth, period, millions of, take away, rise, level, refer to
2. Learn some useful sentences:
(1) When it rains or when the wind blows, the earth is taken away.
(2) The heat from the sun can’t escape so thetemperature 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) 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.
Ⅱ. Teaching aids 教具 图片/小黑板
Ⅲ. Five-finger Teaching Plan 五指教学方案 Step 1 Review 第一步 复习(时间:4分钟) 通过检查作业，引导学生开拓思维，提出保护环境和水资源的具体措施，复习不定代词和副词。为学习新词汇作准备。
(检查作业，并找学生汇报结果，引导学生如何保护水资源。)
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: Pass laws against water pollution.
S5:Collect andreuse waste water.
…
Step 2 Presentation 第二步 呈现(时间:18分钟) 教师通过日常对话，借助1a中的图片，创设情景，导入新课，呈现新的词汇。
1. (教师由日常对话，引出本课话题，呈现部分新词汇。)
T: What’s the weather like today?
Ss: It’s …
T: As we know,Beijingoften has sandstorms in spring. What causes the bad weather?
Ss: Cutting down too many trees.
(展示1a第二幅图画。)
T: Yes. All over the world, people have cut down millions of trees. And trees become fewer and fewer.
(板书并要求学生掌握。)
T: 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 …
S3: …
T: Yes. Trees can stop the wind and water from taking the earth away.
(板书并要求学生掌握。)
T: Anything else?
Ss: (允许学生用汉语回答。)树能吸收二氧化碳并释放氧气。
T: That’s right. Trees can breathe in carbon dioxide and breathe out oxygen.
(板书并要求学生理解。)
carbon dioxide: CO2
oxygen: O2
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T: Where does CO2 come from?
S4: Animals’breathing.
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第五幅图。)Please look at the picture.
(板书并要求学生理解。)
T: The heat from the sun can’t escape, so the temperature is rising.
(板书并要求学生掌握rise；理解escape。)
T: This is called “the greenhouse effect”.
(板书并要求学生理解。)
T: 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.
(板书并要求学生掌握。)
T: (展示1a第4幅图。)Please look at this picture. Around the earth, there’s a special kind of oxygen called “ozone”.
(板书并要求学生理解。)
T: But now air pollution is destroying it and that has made a very big hole in the ozone layer.
(板书并要求学生理解。)
T: Too much harmful radiation from the sun passes through the hole and reaches the earth.
(板书并要求学生理解。)
2. (让学生快速阅读1a，用所给的词组填空。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.
(板书并要求学生掌握。)
(学生完成后与教师核对答案。)
3. (教师出示小黑板上的问题，让学生再读一遍课文后回答。)
(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 the air increased a lot?
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(让个别学生回答，完成小黑板上的问题。)
Step 3 Consolidation 第三步 巩固(时间:8分钟) 让学生再次读1a，完成1b，巩固本课的语言点，培养学生的阅读能力。
1. (让学生再次读课文，完成1b。)
T: Read the passage again. Finish 1b alone.
(板书并让学生猜测Mars和refer to的汉语意思。掌握refer to；了解Mars。)
(学生完成后，师生核对答案。)
2. (放录音，学生跟读课文。)
T: Now follow the tape to read the passage.
3. (教师让学生讨论并找出新的或不懂的语言点，培养学生的自主学习能力。教师解释学生仍有疑惑的知识点并板书。)
4. (让学生两人一组讨论，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 to1a, finish the form on the blackboard.
(板书)
Step 4 Practice 第四步 练习(时间:10分钟) 使学生了解各种污染对地球环境的影响，培养他们的环保意识。
1. (让学生分组讨论，看哪组最快说出O3，CO2和温室效应的含义及其对环境的影响，并以此写一篇短文，完成2。)
T: Please read the passage again, discuss the meanings of the following expressions in2 ingroups of 4, and then write down how they affect the environment.
(学生讨论后，与教师核对答案。)
2. (根据给出的提示词写一篇小短文，可先口述。)
T: Write a short passage with the key words given.
(板书关键词。)
(1)change…in many ways
(2)important, destroy, too much, harmful radiation, cause cancer
(3)increase a lot, blanket, rise, change
(4)serious, do something
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Step 5 Project 第五步 综合探究活动(时间:5分钟) 让学生讨论各种危害地球的污染方式，并就有关污染写一篇短文，培养学生综合运用语言的能力，增强学生的环保意识。
1. (到目前为止，污染危害地球的方式已基本介绍完毕，可以让学生做专题讨论，以培养他们的综合语言运用能力。在此过程中，鼓励学生大胆发挥，做最大程度的拓展性讨论。最后通过汇报，教师检验活动成果。)
T: OK, until now, we have learned so many kinds of pollution. Now please work in groups and discuss them. After a moment, I’ll ask some students to report it.
2. Homework:
Write an article about the pollution.
板书设计：
All these problems are very serious. Section C millions of … When it rains or when the wind blows, the earth is taken away.
take away As a result, many rivers and lakes are now dead.
refer to The heat from the sun can’t escape so the temperature is rising.
It causes the level of the oceans to rise and the climate of the earth to change.
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Section D The main activities are1a和4. 本课重点活动是1a和4。
Ⅰ. Teaching aims and demands 教学目标 1. Learn a new phrase:
take up
2. Learn some useful sentences:
(1) This harms the environment …
(2) At the same time, dealing with …
(3) Of all the garbage, about 35 percent can be recycled while the rest can’t.
(4) How shall we deal with it?
3. Review the indefinite pronoun and adverb:
(1) None of us likes pollution.
(2) Don’t spit anywhere in public.
(3) Everyone should care for wild animals and plant more trees.
(4) We should do everything we can to protect the environment.
4. Talk about the harm of rubbish.
5. Go on developing the students’ sense of environmental protection.
Ⅱ. Teaching aids 教具 图片/录音机/小黑板
Ⅲ. Five-finger Teaching Plan 五指教学方案 Step 1 Review 第一步 复习(时间:5分钟) 师生对话，复习Section C的内容，为学习新词汇作准备。
1. (复习讨论Section C的综合探究活动，教师作总结。)
2. (教师通过复习上一课的内容为学习新词汇做准备。)
T: After learning Section C, we have known that many kinds of pollution affect our environment. How do factories affect our environment?
S1: They / Factories have polluted the land and the water.
S2: Factories make some rivers and lakes dead now.
S3: …
T: Very good. How do cars and buses affect our environment?
S4: They have polluted the air.
S5: They have caused noise pollution.
S6: …
T: How does cutting down too many trees affect our environment?
S7: Some forests have changed into deserts.
S8: More and more different sorts of animals and plants are disappearing.
S9: When it rains or when the wind blows, the earth is taken away.
Step 2 Presentation 第二步 呈现(时间:16分钟) 呈现1a，完成1b。培养学生的听说技能。
1. (教师展示有关垃圾的图片，导入1a，呈现新词汇。)
T: OK. Now let’s talk about another serious problem.
(教师展示1a中的图片。)
T: What’s in the picture?
Ss: Waste./Rubbish.
T: How do people deal with the waste?
Ss: Put it into the land.
T: So the waste takes up a lot of land and it does great harm to our environment.
(板书并要求学生掌握。)
T: In fact, some of the rubbish can be recycled.
(板书并要求学生理解。)
T: Every day, we produce lots of rubbish. Please listen to the tape and fill in the blanks in1a. Let’s learn about what trouble the waste brings us.
(学生听录音，完成1a。师生共同核对答案。)
2. (让学生再读1a，回答小黑板上的问题。)
T: Please read1aagain and find out the answers to the questions on the small blackboard.
(出示小黑板。)
(1) How much waste is put into the land inBritain?
(2) Is it easy to find new land to put rubbish in?
(3) Can all of the rubbish be recycled?
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(核对答案。)
3. (让学生依据1a完成1b。)
T: Well done! Now let’s read1aagain and underline the sentences with the same meanings as the ones in 1b, then finish 1b.
(核对答案。)
Step 3 Consolidation 第三步 巩固(时间:8分钟) 教师和学生一起归纳短文中的语言点，然后让学生据此写一个如何处理垃圾的小短文。培养学生综合运用语言的能力。
1. (让学生跟读1a录音，并注意语音语调。)
T: Please read the passage after the tape, and pay attention to the pronunciation and intonation.
2. (教师和学生一起归纳短文中的语言点并板书。)
T: Let’s look at the important points in1atogether.
3. (让学生讨论平时是如何处理垃圾的，并写一个与此内容有关的小短文，完成后展示成果。)
T: Please discuss this problem: How shall we deal with the garbage?
(板书并要求学生理解。)
How shall we deal with the garbage?
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Example:
We produce garbage every day. Some people often throw it in the river or put it into the land … …
Step 4 Practice 第四步 练习(时间:10分钟) 以练习的形式复习不定代词和不定副词的用法，以及本话题的功能用语。完成2a，2b和3。
1. (复习不定代词/副词。)
T: We know, pollution is a serious problem. What should we do to protect the environment?
Here are some sentences about protecting the environment. Please complete them with the
words in the box.
no one, nobody, none, everyone, everything, something, anything, everywhere
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1. _____ should plant more trees.
2. We shouldn’t throw litter ______.
3. We can’t do ______ to harm our environment.
4. ______ of us likes water pollution.
5. They want to make ______ clean.
6. ______ can smoke here.
7. We should do ______ to protect our environment.
8. _____ likes air pollution.
(教师与学生核对答案，让学生齐读以上句子，复习巩固不定代词/副词的用法。)
2. (教师放录音，学生跟读2a中的句子。)
T: Listen to the tape and repeat it. Please pay attention to the indefinite pronoun and adverb.
3. (教师放录音，让学生跟读2b中的句子，找出这些句中的语言点并造句。)
T: Let’s listen to the tape and repeat it.
(学生读2b中的句子。)
T: Now, please make sentences with the language points in 2b.
Examples:
S1: Trees can stop the water from running away.
S2: We have come to realize that water is important to us.
…
4. (听3录音，完成3。)
Step 5 Project 第五步 综合探究活动(时间:6分钟) 把学生分为四组，让各组分别充当水，树，土地，空气，用英语叙述各自的优点及所面临的问题和自己的愿望。每组讨论后，做成海报。让学生意识到环境保护的重要性。
1. (把学生分成四组，即水小组，树小组，土小组和空气小组。)
T: Let’s do an activity in groups. Each group should have six students.
Group 1, you are Water Group.
Group 2, you are Tree Group.
Group 3, you are Soil Group.
Group 4, you are Air Group.
2. (让学生讨论自己小组的优点，面临的问题和愿望，然后在全班做个报告。完成4。)
T: Each group should discuss your own usefulness and the problems that you face and your wishes, then please give a report like the example in 4.
(学生讨论完毕后，师生一起分享活动成果——报告。)
3. Homework:
(根据活动的成果制作海报。)
T: Please make your posters with your results, and share it with your classmates.
板书设计：
All these problems are very serious. Section D take up This harms the environment …
At the same time, dealing with…
不定代词/副词 Of all the garbage, about 35 percent can be recycled while the rest can’t.
How shall we deal with it?
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发表于 2013-9-16 17:26:40
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on’t spit anywhere in public.