《选修6 Unit 4 Global warming 全单元教案.docx》由会员分享，可在线阅读，更多相关《选修6 Unit 4 Global warming 全单元教案.docx（30页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、Unit 4 Global warmingI.单元教学目标技能目标Skill GoalsA Talk about global warming, pollution and the importance of protecting the earthA Practise expressing agreement, disagreement, blame and complaintHow to use “it” for emphasis in a sentenceA Write an essay on environmental problemsII.目标语言功 能 句 式Expressing
2、agreement, disagreement, blame and complaintYes, I agree with you.Yes, I think so.I believe that youve got it right.I dont think so.I dont think thats right.Fm afraid you are wrong.Im sorry to bring this up, but.Im sorry to have to say this, but.They shouldnt have done it.They are to blame.Why dont
3、you do something about it?Perhaps they should / ought to do .词汇1 .四会词汇compare, graph, phenomenon, fuel, quantity, per, data, catastrophe, climate, consequence, state, range, glance, widespread, decrease, steady, steadily, average, existence, outer, electrical, motor, can (n.), microwave, nuclear, di
4、sagreement, title2 .认读词汇renewable, greenhouse, Fahrenheit, Sophie, Armstrong, Janice, Foster, methane, Charles Keeling, measurement, Celsius, famine, destruction,Step III While-readingGet the students to read the passage fast and meanwhile help the students form a good habit of reading.T: What do yo
5、u think will be talked about at the sight of the title THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?” Now please skim the passage to obtain a general idea of the whole passage. While reading, pay attention to the writing skills and if possible, divide the whole passage into several parts and summ
6、arize the main idea for each part.After a few minutes.T: How many parts can this text be divided into?T: Any different ideas? OK. Now lets finish the form on the screen.Show the form on the screen and let the students complete the form.Main ideas of each partWriting techniquesStep IV ComprehendingLe
7、t the students read the passage again to find out the answers to the questions in Exercises 1 and 2.T: Now lets listen to the tape. While listening, pay more attention to specific information. Then read the whole passage by yourselves. Try to find out the answers to questions in Exercises 1 and 2. Y
8、ou may work in groups.Step V DebateGet the students to debate over the statement: We should do nothing about global warming. Let them work in groups of six to prepare it.T: Now you are going to have a debate: We should do nothing about global warming. Please follow these instructions.Put the followi
9、ng instructions on the screen. Get into groups of six. Decide which three in your group are going to agree with the statement (Group A) and which three are going to disagree with the statement (Group B). Group A discuss why they agree with the statement; Group B discuss why they disagree. Group A an
10、d B get together. Tell each other the reasons why agree or disagree with the statement.T: We dont have time to do it in class. Please finish it after class. Try to collect as much information as possible on the Internet and share it with the others in class. Next class ril get some groups to act out
11、 your debates.Step VI Homework1. Read the passage again and review the new words and expressions.2. Prepare the debate in groups.3. Preview Using Language WHAT CAN WE DO ABOUT GLOBAL WARMING?The Third Period Extensive ReadingTeaching goals 教学目标1. Target language 目 标语言a.重点词汇和短语pollution, electrical,
12、motor, can (n.), microwave, disagreement, title, make a difference, put up with, leave an electrical appliance on, so long as, and so onb.重点句式P30Together, individuals can make a difference.It takes a lot of energy to make things from new materials.Remember - your contribution counts.2. Ability goals
13、 能力目标Get the students to realize what individuals can do about global warming.3. Learning ability goals 学能目标Learn what to do in daily life to reduce the carbon dioxide content in the air.Teaching important points 教学重点Enable the students to know what to do in daily life to reduce the carbon dioxide c
14、ontent in the air.Teaching difficult points 教学难点Enable the students to learn how to make a poster.Teaching methods 教学方法Listening, skimming and group work.Teaching aids教具准备A recorder and a computer.Teaching procedures & ways 教学过程与方式Step I RevisionCheck the students9 homework to see whether they have
15、mastered what they learnt last class.Check their group work - debate.T: Have you finished your homework - prepare a debate in groups?Ss: Yes.T: Which groups would like to come to the front and act out your debates? Choose one as your representative.Ask a representative in each group to state their g
16、roups opinion.A sample debate: (A二Group A; B=Group B)A: We think people should do something about global warming. Because it could have many negative effects on the earth. With temperature increasing, the polar ice caps eventually would melt, causing sea levels to rise by several meters. Coastal and
17、 low-lying cities would be submerged. Some scientists predict severe storms, droughts, famines, the spread of diseases and the destruction of species. Dont you think these are terrible? So dont hesitate to take action to reduce the carbon dioxide content in the air. Only in this way will we be able
18、to save the earth and save ourselves.B: We dont think so. Some scientists9 concerns about global warming are just speculation. I want to remind everyone to pay attention to what Group A has just said.You said a lot of “could” and “would，which obviously indicates that you are not sure about the bad e
19、ffects you just mentioned. In our opinion, global warming will be mild with few bad environmental consequences. Whats more, more carbon dioxide is actually a positive thing. It will make plants grow faster; crops will produce more; it will make a greater range of animals, all of which will make life
20、 for humans better. So theres no need for us to reduce the carbon dioxide.A: It is true that no one knows exactly what the effects of global warming will be. But dont you think it will be too late for us to take action after the bad effects come out? Hope for the best and prepare for the worst.B: .S
21、tep II Lead-inT: Group A did a good job and showed us the importance of reducing the amount of carbon dioxide in the air. But what shall we do in our daily life?Sa: Save energy. For example, if we are not using the lights, the TV, the computer and so on, turn them off.Sb: Cars use a lot of energy, s
22、o wed better walk or ride a bike.Sc: Buy things made from recycled materials because it takes a lot of energy to make things from new materials.T: Right. Youve done a good job. Next open your books and turn to page 30. Today well read two letters and learn what we can do about global warming.Step II
23、I Listening and ReadingGet the students to read the two letters and then fill in the table on page 30.T: Skim the letters and find who the writers are and what their purpose of writing the letters is.Sd: The first letter is written by a student who is asking for suggestions for his project 一 global
24、warming.Se: The second letter is written by an editor of Earth Care magazine. He offers the student some suggestions on what to do about global warming.T: Good answers. Now scan the letter and list Earth Cares suggestions and then in groups, discuss whether you think you can carry out each suggestio
25、n. Give reasons foryour answers.Sample answers:Earth Cares suggestionsCan you carry it out?ReasonsIf you are not using electrical appliances, turn them off.If youre cold, put on more clothes instead of turning up the heat.Motor vehicles use a lot of energy, so walk or ride a bike if you can.Recycle
26、cans, bottles, plastics and newspapers and buy things made from recycled materials.Get your parents or friends to buy products that are made to save energy.Plant more trees.Talk with your family and friends about global warming and tell them what youve learned.Step IV Making a posterHelp the student
27、s learn how to make a poster. The teacher may collect some posters or pictures about the environment and show them to the students in class.T: Now in groups of five, make a poster for your school that tells the students various ways they can reduce the amount of carbon dioxide in the air. Remember t
28、he following: give your poster a large heading, use imperative sentences to list the ways we can reduce the amount of carbon dioxide in the air. Whats more, try every possible way to make your poster impressive, which is the purpose of a poster. If time is limited, you can finish it after class.Step
29、 V HomeworkFinish the poster.The Fourth Period Language StudyTeaching goals 教学目标1. Target language 目标语言a.重点词汇和短语glance, widespread, decrease, steady, average, existence, outer, on the whole b.重点句式It is human activity that has caused this global warming. P29.it is the burning of more and more fossil
30、fuels that is resulting in this increase in carbon dioxide. P262. Ability goals 能力目标Learn about “it used for emphasis.3. Learning ability goals 学能目标Help the students learn how to use new words and expressions of this unit and how to use it” fbr emphasis.Teaching important points 教学重点The structure of
31、 “It is . thatTeaching difficult points 教学难点Teach the students how to master the use of it” fbr emphasis.Teaching methods 教学方法Explanation and practice.Teaching aids教具准备A computer.Teaching procedures & ways 教学过程与方式Step I RevisionT: Good morning, everyone.Ss: Good morning, sir / madam.T: First ril che
32、ck your homework. Have you finished the poster?Ss: Yes.T: Well, which group would like to show us yours?Get several groups to show their posters.A sample poster:What Can We Do about Carbon Dioxide?Carbon dioxide is one of the main causes of global warming which will bring the earth catastrophe. Here
33、 are a few ways that individuals can follow to reduce its content in the air. Turn the electrical appliances off if you are not using them. Put on more clothes if you are cold instead of turning up the heat. Walk or ride a bike instead of using motor vehicles if you can. Recycle cans, bottles, plast
34、ics and newspapers; buy things made from recycled materials. Buy products that are made to save energy such as fridges and microwaves. Plant trees in your garden or school yard.Together, individuals make a difference. Its time for us to do something about carbon dioxide. Talk with your friends or fa
35、mily about global warming. Lets work together and care the planet we are living in.Step II Discovering words and expressionsT: Now please open your books and turn to page 28. Lets do some exercises.Step III Discovering useful structuresT: Next lets turn back to page 29. Well learn a useful structure
36、. Now compare these two sentences below.Show the following two sentences on the screen.Human activity has caused this global warming.It is human activity that has caused this global warming.T: Who can translate them into Chinese?Sa: I think they are the same. They both mean 人类行为引发了 全球变暖”.Sb: I dont
37、think so. They are a little bit different. The latter one should be “弓I 发全 球变暖的正是人类行为”. In the second sentence, uhuman activity v is emphasized. T: Quite right. This is the structure we are going to learn today.Present the structure on the screen and give some explanation.由it引导的强调句结构：It is (was) +被强
38、调部分+ that (who) +句子其他部分 注意：此结构强调的成分仅限于主语，宾语和状语。 如：原句： My father did the experiment in the lab yesterday evening.强调主语：It was my father who did the experiment in the lab yesterday evening. 强调宾语：It was the experiment that my father did in the lab yesterday evening. 强调时间： It was yesterday evening that m
39、y father did the experiment in the lab. 强调地点： It was in the lab that my father did the experiment yesterday evening. 又如：It was in that city that we met for the first time.It was not until he told me that I knew the truth.典型例题分析：1) It was last night I saw the film Star Wars.A. who B. whenC. that D. w
40、hich答案C.强调句的结构是：It + be +强调部分+ that (who) +主谓句。强调句 的连词只有两个，that和whoo当强调的部分是人，且为句子的主语时，才用 who,其余用thato2) It is ten years Miss Green returned to Canada.A. that B. whenC. since D. as答案C.考点是连词用法。本题易误选为A.其实本句不是强调句。若是，去掉It bethat还应是一个完整的句子。而本句去 掉It is that,只剩下 ten years Miss Green returned to Canada 不成句。因
41、此本 句不是强调句。It is +时间+ since 其中is二has been.T: In the article there are two sentences in which “it” is used fbr emphasis. Can you find them?Sc: Yes. One is “It was a scientist called Charles Keeling who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997.” The
42、 other is “It is the burning of more and more fossil fuels that is resulting in this increase in carbon dioxide.”T: Good. Next lets do some practice about this structure. Turn to page 29, Exercise 2. Please rewrite each sentence with “It is . that . to give more emphasis to the underlined part.Sampl
43、e answers:1. It is greenhouse gases that have warmed the earth by trapping heat energy in the atmosphere.2. It is the greenhouse effect that gives the earths surface the average temperature of 15.3. It is fossil fuels that much of the energy used to light and heat our homes comes from.4. It is the U
44、nited States of America that the biggest producer of greenhouse gases is.5. It is for centuries that carbon dioxide stays in the atmosphere while other greenhouse gases stay in the atmosphere only for a day or less.6. It is their very existence that low-lying countries feel is in danger from rising
45、sea levels.7. It is human activities that many scientists believe that have caused the earths temperature to rise.8. It is future climate changes and their effects on our environment that scientists want to find out about.9. It is by several meters that the level of the sea could rise because of glo
46、bal warming in the years ahead.10. It is outer space that might provide us with new energy sources in the future.Step IV Using structuresGet the students to do more exercises about the use of “it for emphasis.T: Please turn to page 64. Read the instructions of the two exercises and then finish them.
47、Sample answers to Exercise 2:(1) It was four Australian children who started it in 1996 when they organized the first childrens environmental conference.(2) It is at this conference that we decide which projects we want to work on in the following year.(3) It was through one of these projects about
48、five years ago that I first became involved in Millennium Kids.Step VI HomeworkMake four sentences with “it” for emphasis.The Fifth Period DrillsTeaching goals 教学目标1. Target language 目标语言a.重点词汇和短语environmental problem, plastic bags, reuse, litter, rubbish items, Clean Up Day, bring upb.重点句式P63Im sorry to bring this up, but.Im sorry to have to say this, b