人教版高中英语选修六Unit Four Global warming

Unit 4 Global warming教学目标1) Learn some knowledge about the greenhouse effect and global warming.2) Know the contents of the text well by talking about this topic and reading.3) Discuss the problem of global warming and express your own opinions学情分析There are two meanings of the term "greenhouse effect". There is a "natural" greenhouse effect that keeps the Earth's climate warm and habitable(suitable for people to live in). Without it, scientists estimate that the average temperature on Earth would be colder by about 30 degrees Celsius (54 degrees Fahrenheit), far too cold to sustain(维持) our current ecosystem. In other words，the normal greenhouse effect is a natural process which is to some degree beneficial to us.重点难点Master the main idea of the first five paragraphs by talking about the topic.教学过程活动1 【讲授】Unit 4Teaching procedures:Step I. GreetingsGreet the whole class as usual.Step II. Lead-inLead to the topic by showing an article to the students and let students know about two types of greenhouse effect ("natural" greenhouse effect and “man-made” greenhouse effect) and their exact meanings.Step III. Analyze two graphs to learn the main idea of the first five paragraphs.From the first graph, we can see that during the 20th century the temperature of the earth rose about one degree Fahrenheit. All scientists agree with the view that the increase in the earth’s temperature is due to the burning of fossil fuels like coal, natural gas and oil to produce energy.More such burning means more carbon dioxide added to the atmosphere.We can see clearly that the levels of carbon dioxide have increased greatly over the past decades.Higher levels of carbon dioxide means sharper increase of the temperature. The phenomenon is called global warming.There has been a debate towards global warming over the pastyears. Opinions about it vary from person to person.Step IV. Read the whole passage to review the main idea of the first five paragraphs and know the two different opinions. Dr. FosterCarbon dioxide has caused the global temperature to ________. An increase of five degrees would be a ____________ and could be very ________.Possible results: __________________(海平面上升)___________________(洪灾)___________________(恶劣的风暴)___________________(干旱)__________________(饥荒)__________________(疾病的传播)___________________________(物种的消失)George Hambley:Any warming will be ______ with few bad ______________________. More carbon dioxide is a _________ thing, which makes crops __________ more and will encourage _____________________.Step V. Discuss the statement: We should take immediate action about global warming.Requirement: Write down your reasons and possible measures on your learning sheetStep VI. Presentation.Ask some students to read their reasons and possible reasons loudly to the whole class.Step VII. Assignment.Make up a complete composition in groups. The passage should include your point of view, your reasons and your measures.精美句子1、善思则能“从无字句处读书”。

人教版高中英语选修6《Unit4Globalwarming》教案人教版高中英语选修6《Unit 4 Global warming》教案【一】教学准备教学目标Teaching Aims:In this class Ss will be able to① practice skimming and scanning for information needed like what are the two concerns and what are Earth Care’s suggestions.② Master the phrases such as: put up with, so long as, and so on, make a difference, have no effect on … , by making sentences or by using them into the post er.③ become aware of the s erious effects of global warming and the importance of saving energy to be environmentally friendly.④ Summarize the points according to their understanding.⑤ work together to design a poster by using the suggestions in the article.教学重难点Teaching Difficulties:Students may find it hard to add more suggestions about how to save energy in our daily life and to summarize the points according to those suggestions. Students may not know clear what is a poster and how to design an attractive and persuasive poster in short time.教学过程Teaching Procedure:Step1. Lead-in (individual & collective work)1. Teacher begins the class by asking: Have you ever seen themovie The Day After Tomorrow? and then let students enjoy a short movie clip with the following two questions:① What kinds of disasters have you seen in the film?② Can you guess how they came about (happen)?2. introduce the topic: global warming. And then have a further question:①What other disaster will be caused by global warming?【Designing Purpose】To arouse students’ interest by watching the movie clip and educe the topic, that is global warming. And then by showing a lot of pictures, make students know and understand the terrible effects of global warming, thus making preparations for promoting environmental protection.Step2. While Reading (Individual work)Skimming: Go through the first letter to f ind:① who is the writer?② what are his two concerns?Scanning: Read the second letter and answer the following questions:① Does Earth Care agree with Ouy ang Guang’s opinion that individuals can have no effect?② what are Earth Care’s suggestions?③ Can we carry those suggestions out? Why?【Designing Purpose】To help the students grasp the main information of the two letters by skimming and scanning. While stud ents get the answer to question1, ask them to find the supporting sentence : Together, individuals can make a difference. We do not have to put up with pollution. Guess the meanings of the two italicized phrases according to the surroundings and their understanding.Step3. Post reading (Pair work)1. Discussion: Make students discuss whether they can find more ways or suggestions about reducing carbon dioxide and saving energy in our daily life.Suggested ways:1) Use less hot water 7)Change a light bulb 8)Try car sharing2) Take a shower instead of a bath3) Buy fresh food instead of frozen4) Buy things that are actually in season5) Eat less high fat food like KFC and Macdonald6) Clean filters(过滤器) on your air conditioner.【Designing Purpose】To cultivate students to work in pairs and learn to summarize an opinion and share the knowledge of saving energy in daily life. To practice the ability of understanding the meaning of new words and expressions to remove the obstacles in reading.Step4. learn what is a poster (collective work)Know what is a poster by giving a simple sample and try to get the structure.【Designing Purpose】To know clearly a poster should have a heading, contents and an eye-catching slogan, which will make it easy for students to design an acceptable poster.Step5. Prepare the poster (individual & group work)1. Decide our content s:①Choose and decide five most important suggestions. (individual work)②Write them down on your paper and try to make them persuasive by using imperativesentences. (individual work)③Compare your list with your group members and decide five for your poster. (groupwork)2. Slogan and heading: showing sample posters to help them decide a heading and a slogan for your poster.【Designing Purpose】This is the most important part of this writing task. Students will be able to summarize and compose sentences by choosing and organizing what they want to say, thus improving their writing ability and the process of output based on what they have learned in reading part. And by learning some sample posters to help them decide their own heading and slogan.Step6. produce &show time (group work)With the heading, slogan and ways, students will not find it difficult to make a poster. What theyShould pay attention is how to illustrate their poster and make it more attractive. And then choose several pairs to represent their posters.【Designing Purpose】Making the poster will improve their cognitive capability of the importance of environmental protection and at the same time they can enjoy a sense of achievement in show time. And they make believe that individuals can really make a difference.课后习题Homework：Put their poster up around the school to make more students know about energy saving and global warming. Write a short passage to tell others how to solve the problem of global warming based on the suggestions you have collected and send it in your QQ zone or blog.板书板书设计：tsunami/ flood/More suggestions: make full use of paper/ use both sides of paperreuse waterlimit the time of using private carssend emails instead of cardsuse less hot wateralways take a shopping bag with youdrive a bicycle but not e-bicycle人教版高中英语选修6《Unit 4 Global warming》教案【二】教学准备教学目标Teaching goals 教学目标1. Target language 目标语言a. 重点词汇和短语energy, light (v.), heat (v.), renewable, non-renewable, fuel, blame, run outb. 交际用语Expressing agreement and disagreementYes, I agree with you.Yes, I think so.I believe that you’ve got it right.I don’t think so.I d on’t think that’s right.I’m afraid you are wrong.2. Ability goals 能力目标Enable the students to talk about different sources of energy and express their own ideas.3. Learning ability goals 学能目标Help the students learn how to give their ideas about the use of energy.教学重难点Teaching important points 教学重点Enable the students to express agreement and disagreement.Teaching difficult points 教学难点Enable the students to learn how to express agreement and disagreement.教学过程Step ⅠRevisionT: Good morning, everyone.Ss: Good morning, teacher.T: Sit down, please. Before class, I’ll check your homework first. Mary, would you read your homework to us?Check the students’ homework and have a discussion with the students about the mistakes Mary made. Let the students have a clear understanding about the mistakes and then correct them.Step ⅡWarming upT: As we all know, we depen d on energy to do many things in our daily life. Some people even say we could do nothing without energy. Can you tell me what we use energy for?Sa: Energy lights our cities.Sb: Energy heats our buildings.Sc: Energy entertains us. With the help of electricity, people have got a lot of fun from watching TV, playing computers and so on.Sd: There are many other electrical appliances that make our life more convenient and comfortable such as washing machines, microwaves, air conditioners and so on.Se: Today energy also helps people realize many so-called dreams in the past. For example, people can “fly” from one place to another by plane which runs on energy.Sf: It’s true. In fact, not only planes but also cars, ships and trains run on energy.T: Well done. All that you’ve just said is right. So it seems that energy plays a very important role in the modern world. Then where does all the energy come from? Open your books and turn to page 25. Look at the pictures on this page. They may help you find out the answers.After a while.T: Who’d like to tell us your answers?Sg: Wind power.Sh: Coal power.T: Right. Is there any difference between them?Si: Yes. Wind will never run out while coal is a limited source.T: It’s true. As we know, an energy source is renewable when supplies of it never run out while some supplies， such as coal, will definitely run out one day. Energy of this kind is called non-renewable sources. Please think of as many sources as you can and decide which energy sources on your list are renewable and which are non-renewable.If necessary, give some words related to the pictures which might be difficult for the students such as oil refinery, hydroelectric power and so on.The teacher should also collect as much information about different sources of energy as possible and show it to the students in class through a computer. In this way, the students will become more interested in this topic and their knowledge on this aspect will be enlarged.Sample answers:Step Ⅲ Listening and DiscussingT: Fromwhat we’ve just talked about, it is clear that energy does a lot of good to us.But every coin has two sides. Is there any negative effect of using energy?Sa: Yes.People use too much energy which is resulting in an increase in carbon dioxide.That is how the global warming comes about.Sb: Andmeanwhile it pollutes the environment.T: It’strue. Many people have realized the problem. N ext we’ll do some listeningpractice on this topic. Let’s see what other people think of this issue.Thestudents are asked to read the questions quickly to find out the listeningpoints first. Then listen to the tape twice and give the correct answers.T: No wplease turn to page 31. Let’s do listening. Before you listen to the tape,please read fast the statements in Exercise 1 to find out the listening points.Pay much attention to the key points while listening.Play thetape for the first time. Help the students get a general understanding aboutthe dialogue. The students listen and try to finish Exercise 1. Play the tapeagain, train the students’ ability to spot specific information and understandthe implication in the dialogue. The students listen and finish Exercise 2.Severalminutes later.T：Have you finished the exercises?Ss: Yes.T: OK,let’s check your answers.Explainsome difficult points if necessary.T: Nowread what Professor Chen and Li Bin say. Work in groups. Discuss who you agreewith and give reasons. Use some of the phrases listed in Exercise 2 or anyothers you know.课后习题Homework1. Review the new words and expressions you learned in this class.2. Preview Reading.。

Unit 4 Global warming学情分析According to the level of students from common class, Learn about the information about the Global Warming and the importance of it in order to know how to protect the earth. 1教学目标1. Understand the passage as a whole and get some detailed information.重点难点【Important points】Understand the passage as a whole and get some detailed information.【Difficult points】Deal with the difficult sentences and how to write a composition .Learn about the information about the Global Warming and the importance of it in order to know how to protect the earth. 4教学过程Step 1.Lead – inAsk students to do the Duty Report and watch a short movie abut Global Warming.Step 2.Previewing case.Ⅰ.Revise the words and Expressions.2.Play a game: word competition.Step 3. Exploring Case :Extensive Reading :Read the passage and find the sentences structure of difficult sentences.Task 1 Fast reading :Ask some questions.1. Who are the writers and what is the purpose of writing the letters?2. What problem does OuyangGuang have?Task 2 Skimming: Try to correct the sentence .1.Ou yang Guang thinks that individuals can make a difference to improve environmental problems at first.2.Many things we do every day may result in the growth of the green house gas.ing things that was made from recycled materials will save a lot of money. Task Task 3 Scanning : Retelling :Fill in the blanks.What can we do about global warming?Ou yang Guang is doing a project on 1______of his school about global warming. He thinks individuals can have little ___ on environmental problems. Individuals can 4____ __ __and we don’t have to put up with ___5_ .They shoulddo something as follows :◆ 1 leave an_______ _____ on so long as you are using it ,if not ___ it __.◆ 2.Put on more clothes instead of turning up the _____.◆ 3. Walk or __________ instead of taking motor vehicles.◆ 4.______ cans, bottles, plastics and newspapers.◆ 5. Buy things made from _______ __________.◆ 6.Buy products that are economical with _______.◆ 7. __________ in your garden or your school yard.◆ 8.Talk with your family and friends about _____________. Task 4: Read the passage and analyze the sentences structure of difficult sentences.Step 4. practice :retell the main points of extensive reading. Step 5: Discussing and WritingWrite a persuasive poster on fighting against the global warming.Step 6. Summary .Step 7.Homework :1.Retell the main points of Extensive reading and recite the three sentences.2.Self-study: learn the language points on Ex 62-64 to do the following exercise about language points on previewing case.精美句子1、善思则能“从无字句处读书”。