Unit 13　We're trying to save the earth!
Language Goal
【语言目标】
Talk about pollution and environmental protection
Knowledge Goals
【知识目标】
Key Words
litter，bottom，fisherman，coal，ugly，advantage，cost，wooden，plastic，cruel，harmful，industry，law，scientific，afford，recycle，gate，bottle，president，work，metal
Key Phrases
be harmful to，at the top of，the food chain，take part in，turn off，pay for，take action，throw away，put sth. to good use，pull down，bring back
Key Sentences
1.We are trying to save the earth.
2．The river used to be so clean.
3．The air is badly polluted.
4．To cut down air pollution，we should take the bus or subway instead of driving.
5．No scientific studies have shown that shark fins are good for health.
6．You should take your own bags when you go shopping.
Key Grammar
Review present progressive tense，used to，passive voice，present perfect tense and modal verbs.
Ability Goals
【能力目标】
1.Learn the words，phrases and structures to talk about environmental pollution and protection.Use the grammar and structures correctly.
Moral Goals
【情感目标】
1.With the help of this unit's study，students pay more attention to environmental protection.Learn how important to keep the balance of nature.
Teaching Time
【课时】
Five periods
Period 1
Section A(1a－2d)
Period 2
Section A(3a－4c)
Period 3
Section B(1a－1e)
Period 4
Section B(2a－2e)
Period 5
Section B(3a－3b) & Self Check
本单元围绕环境保护的话题，并用主题图片表现噪音污染、空气污染、水污染等内容，目的是为了让学生对环境的破坏有一个直观的认识，从而激发学生强烈的社会责任感和对未来发展的思考。Section A的重点是让学生掌握与环境污染和环境保护相关的词汇和句型，同时引导学生关爱动物、保护环境。教学难点是让学生学会正确使用连词和结合生活实际讲述如何保护环境。Section B在Section A所学的基础上，进一步谈论如何保护环境。教学重点是让学生了解环境保护的方式，并落实到积极的行动当中，同时还有阅读策略和写作技巧的训练。教学难点是让学生在阅读2a文章之后，根据所给词根出衍生出的不同词汇，并理解前缀和后缀的不同用法。

The First Period—Section A(1a－2d)
Teaching Important Points　【教学重点】
　Key words & phrases：
　litter，bottom，fisherman，coal，ugly，advantage，cost，wooden，plastic
noise pollution，air pollution，water pollution，be full of，play a part in，turn…into，cut down air pollution
　Key sentences：
　1.Even the bottom of the river was full of rubbish.
　2.It used to be so clean.
　3.Everyone in this town should play a part in cleaning it up.
　4.The air is badly polluted because there are more cars on the road these days.
　5.The air has become really polluted around here.
　6.We're trying to save the earth.
　Key structure：
　should＋do；used to＋do；have/has＋done；be＋done；be＋doing
e．g.Everyone should help to clean up the river.
The air has become really polluted.
I used to be able to see stars in the sky.
The air is badly polluted.
Teaching Difficult Points　【教学难点】
be about to　★Practice the structures to talk about pollution and environmental protection.
Teaching Aids　【教学工具】
　A tape recorder，CAI or multimedia courseware.
Teaching Steps　【教学过程】
★Step 1　Leading in　【新课导入】
1．Greeting
2．Discussion and review
Discuss with the students，like this：
T：What kinds of pollution are there these days?
S：…
T：What causes the pollution?
S：…
3．Review the words and expressions about the topic.
★Step 2　Cooperative inquiry　【合作探究】
1．Finish the task in 1a
①Show pictures or play videos about pollution and talk about the pollution.
②Read these phrases in 1a.Look at the pictures in 1a and say what they see in the pictures.Write down the words and add more words.
③Ask students to say out their words in each kind of pollution.
2．Finish the task in 1b
①Read the instructions.Get the students to read the contents in the chart and think of what they will fill in the blanks.
②Play the recording for the first time.Students listen and fill in the words.
③Play the recording a second time.Ask them to check the answers.Then ask the questions.Students answer with full sentences.
④Ask more questions to help students learn more details.Then play the recording for the students to role－pay the conversation.
3．Finish the task in 1c
①Show the key words of the conversation.Ask students to retell the contents in the chart.Like this：
What：dirty；bottom，rubbish；fish
Why：littering，putting waste
How：write to，close down；help to clean up
②Read aloud the model dialogue in 1c.Then in pairs，do the oral practice with more words.

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