教材分析
1、教學(xué)內(nèi)容
本單元的中心話題是“拯救地球”，具體涉及地球所面臨的問題。造成這些問題的原因和解決問題的辦法等。語言技能和語言知識(shí)都是圍繞拯救地球這一中心話題設(shè)計(jì)的。
“熱身”(Warming up)由兩部分組成。第一部分提供了六幅圖片，內(nèi)容涉及水污染、垃圾污染、空氣污染、過度砍伐、沙漠化和饑餓等幾個(gè)主題，讓學(xué)生直觀地感受地球所面臨的一些重大問題。第二部分設(shè)計(jì)了五個(gè)問題。前三個(gè)問題的目的是激活學(xué)生知識(shí)體系中關(guān)于目前世界上幾個(gè)比較突出的問題的相關(guān)知識(shí)。后兩個(gè)問題要求學(xué)生對(duì)本單元的學(xué)習(xí)做出預(yù)測(cè)。
“聽力”(Listening )部分提供了一段演說詞，談到了地球所面臨的問題。第一部分要求學(xué)生通過聽弄清說話者的觀點(diǎn)，并根據(jù)所聽內(nèi)容預(yù)測(cè)下文；第二部分要求學(xué)生列出說話人的觀點(diǎn)等，然后預(yù)測(cè)下文。
“口語”(Speaking)部分設(shè)計(jì)了一個(gè)主題情境，同時(shí)提供了五個(gè)角色，要求學(xué)生在小組討論的基礎(chǔ)上，提出解決問題的方法。整個(gè)活動(dòng)以說為主，同時(shí)涉及了聽、寫的技能。
“讀前”(Pre-reading)部分在告知學(xué)生文章的主旨之后，要求學(xué)生積極預(yù)測(cè)文章的導(dǎo)入、主體和結(jié)論三個(gè)部分的內(nèi)容。
“閱讀”(Reading)部分是一篇關(guān)于“地球峰會(huì)”的介紹性文章。文章介紹了2002年在南非首都約翰內(nèi)斯堡召開的“地球峰會(huì)”的基本情況，包括會(huì)議召開的背景、會(huì)議的主題以及與會(huì)者所討論的主要問題和提出的解決辦法等。
“讀后”(Post-reading)部分由四個(gè)問題構(gòu)成。
“語言學(xué)習(xí)”(Language study)包括詞匯和語法兩部分。
“綜合技能”(integrating skills)部分設(shè)計(jì)了聽、說、寫的活動(dòng)，以寫為主線。要求學(xué)生在聽的基礎(chǔ)上陳述觀點(diǎn)，寫提綱段落。
“學(xué)習(xí)建議”(Tips)部分介紹了如何準(zhǔn)備發(fā)言，幫助學(xué)生掌握發(fā)言的技巧。
“復(fù)習(xí)要點(diǎn)”(Checkpoint)部分扼要地總結(jié)了本單元的語法重點(diǎn)-----常見的倒裝結(jié)構(gòu)。
2、教學(xué)目標(biāo)
1）、語言知識(shí)
單詞：summarise, content, representative, access, violence, premier, stress,
equality, harmony, alternative等
詞組：take action, in harmony with…, put an end to.
語法：高中英語常見的倒裝句式
1. Conferences like the Earth Summit help people understand that there exist serious problems and that there is still time to take action.
2. Not until we know more will we be able to improve the situation.
3. Among the speakers was China’s then Premier Zhu Rongji, who stressed the need for equality and fairness in the world.
4. A better understanding of the environment is necessary, as is the willingness to act.
5. Only by changing the way we live can we save the earth.
6. Has I known that air conditioners cause so much pollution, I would never have bought one.
7. Without international cooperation, developing countries cannot prosper, nor will sustainable development be possible.
2）、語言技能
聽：聽懂一段關(guān)于地球所面臨的問題的演說詞，抓住說話人的觀點(diǎn)，預(yù)測(cè)下文。
說：能用恰當(dāng)?shù)恼Z言陳述自己的看法和觀點(diǎn)。
讀：scanning, skimming, careful reading, generalization, inference等微閱讀技能。
寫： 能運(yùn)用 It’s +adj. +…\ I suggest that…\ I would advise…\ I recommend that…等結(jié)構(gòu)清楚而富有邏輯地表達(dá)自己的觀點(diǎn)。
3）、情感態(tài)度 學(xué)生能在習(xí)得英語語言知識(shí)，體驗(yàn)用英語交流的成功和喜悅的同時(shí)進(jìn)一步了解地球所面臨的問題，樹立起捍衛(wèi)地球的責(zé)任感和使命感。
二、教學(xué)重點(diǎn)和難點(diǎn)
重點(diǎn)：1、課文中出現(xiàn)的重要的詞和詞組：
2、各種常見的倒裝句式和結(jié)構(gòu)。
3、運(yùn)用I suggest that…\ I would advise…\ I recommend that…等結(jié)構(gòu)寫出表述觀點(diǎn)的段落。
難點(diǎn)：1. 能用流暢得體的英語陳述觀點(diǎn)。
2.. 學(xué)會(huì)用英語簡(jiǎn)明扼要地列提綱，有邏輯性地寫作文。
教學(xué)設(shè)計(jì)
Period I Warming up and listening
Teaching Aims:
Train the students’ listening ability.
Help the students to know something about the pollution.
Teaching Procedures:
Step1.warming up
Task1. Looking at two groups of comparing pictures with questions:
What can you see in the pictures?
What is the biggest problem facing the earth? Why do you think so?
Task2. Group discussion:
What can we do to solve the problem?
(Purpose: 引發(fā)學(xué)生對(duì)污染的感性認(rèn)知，為聽力材料的引出作好鋪墊)
Step2. Pre-listening
Task3. Talking about the picture in the book and trying to guess what the speaker is talking about.
(Purpose:訓(xùn)練學(xué)生對(duì)文章的猜測(cè)能力)
Step3. Listening (part1)
Task4. Spot dictation
1. Today we are celebrating Earth Day. Earth Day is a day for ______ and ____. Today people in countries all over the world get together to discuss ____ ____ and ___ ____, and to _____ ____ to improve the current situation. Earth Day is a ____ for us to learn about the world and _____ our behavior.
2. The earth is already becoming a _____ _____, but there is still ____ to do something about the _____. If we want to have ____ ____in the future, we must learn to____ ____ ____ _____our water. We must ____ _____our water. We must learn to ____ ____in our daily life.
(Purpose:降低聽力材料的難度的同時(shí)提高學(xué)生捕捉信息的能力)
Task 5 Listening to the tape to get the correct answers to the following questions:
Why is she giving this speech?
What does she think the most serious problem is?
What do you think she will say next?
(Purpose:檢測(cè)學(xué)生對(duì)聽力材料的理解和把握程度，使學(xué)生的聽力能力得到培養(yǎng))
Step4. Listening (part2)
Task 6 Multiple choices
What’s the usage of most of the fresh water?
A. for drinking B. for washing C. for farming
2. The best way to solve the problem is ________.
A. to use the developed knowledge and technology
B. to use our traditional method
C. to find our own special way
Task7. Listening to the tape and outlining the speaker’s arguments.
Argument 1: We should ___________________________
We must _____________________________
We must _____________________________
If we _______, we____________________.
Argument 2: ____________________________________
Problem:______________________________
Solutions:_____________________________
Period 2 Speaking
Teaching Aims:
Improve the students’ speaking ability by talking about our school environment.
Learn and master some useful expressions for supporting an opinion.
Teaching Procedures:
Step1. Leading in
Task 1 Show the students a group of pictures about every corner of a clean campus, asking the questions below.
Imagine if you study in such a nice school, what’s your feeling?
Compare it with our school, can you find the differences between them?
(Purpose:培養(yǎng)學(xué)生積極用英語思考和看圖說話的能力)
Step 2. Discussion
Task 2. Get the students to discuss the question in pairs:
How does the differences happen? List the causes.
(Purpose:承上啟下，為問題的提出和解決作好知識(shí)儲(chǔ)備)
Step 3 Speaking
Task 3. Discuss in groups, using the given expressions.
We must make sure that….
It’s clear that….
I believe that we must….
I’m all for….
If nothing is done…., then…..
I can’t imagine that….
It would be better if we….
Is there a better way to …?
Sure / Certainly / Absolutely.
What can we do to make our school a new look?
(Purpose:培養(yǎng)學(xué)生圍繞中心話題用英語進(jìn)行思考和討論的能力，提高說的技能)
Step4. Outlining
Task 4. Make an outline of a passage titled “Beautify our school”.
Introduction___________________________________________________
Body_________________________________________________________
_________________________________________________________
_________________________________________________________
Conclusion____________________________________________________
(Purpose:鞏固和總結(jié)討論的成果，是說的延伸和落實(shí))
Period 3&4 Reading
Teaching Aims:
Improve the students’ reading ability.
Learn some useful words and expressions.
Learn something about the Earth Summit to help the students know the importance of protecting our earth.
Teaching Procedures:
Step1. Warming up
Task1. Looking at some pictures and discussing
Are you familiar with these places? Where are they?
Since the earth is being seriously polluted, what can we do to protect the environment?
(Purpose:引出話題)
Task2. Discussing and predicting.
If you are asked to write an article about the Earth Summit and some of the major problems facing the world, try to work in pairs and write down what you think each part of your text will be about.
Introduction___________________________________________________
Body_________________________________________________________
_________________________________________________________
_________________________________________________________
Conclusion_____________________________________________________
(Purpose:開發(fā)學(xué)生的思維，引導(dǎo)學(xué)生對(duì)文章作出預(yù)測(cè))
Step2. Fast reading
Task3. Read the text as fast as possible, and try to find the answers to the following questions.
What are the “big three”?
Which of the issues discussed at the Earth Summit do you think is the most important?
Why?
(Purpose:培養(yǎng)學(xué)生速讀的技能，使其初步掌握文章大意)
Step3. Intensive reading
Task4. Read the text as carefully as possible, and try to answer the questions below.
When and where was the first Earth Summit held? What does “sustainable development” mean?
What are the big three killers? How many deaths do they cause separately?
What does global development really mean?
Is the Earth Summit only about problems?
What can we do to save the earth?
(Purpose:幫助學(xué)生進(jìn)一步深入地理解文章的細(xì)節(jié)，培養(yǎng)其微閱讀技能)
Step4. Consolidation
Task5. Outline the text, and compare it with yours made at the beginning of the class.
Introduction___________________________________________________
Body_________________________________________________________
_________________________________________________________
_________________________________________________________
Conclusion_____________________________________________________
(Purpose:從總體上把握和總結(jié)文章)
Step5. Discussion
Task 6. Discuss in groups of six and then report.
Are conferences like the Earth Summit important and meaningful?
Why or Why not?
(Purpose:深化主題，激發(fā)學(xué)生樹立起“捍衛(wèi)地球，人人有責(zé)”的使命感；同時(shí)培養(yǎng)學(xué)生相互間的合作精神)
一點(diǎn)困惑：
在21世紀(jì)的今天，英語成為一種國(guó)際語言變得越來越重要，人人都想學(xué)好英語，但怎樣才能學(xué)好英語呢？作為一名英語教師，面對(duì)課堂上眾多程度參差不齊的學(xué)生，千篇一律地使用同一種教材和教法授課，要使課堂活躍生動(dòng)，要讓學(xué)生全面提高四種技能，又要把學(xué)生培養(yǎng)成考場(chǎng)里的佼佼者，該怎樣找到這三者的結(jié)合點(diǎn)？