高中英语人教版 (2019)选择性必修 第三册Unit 3 Environmental Protection教学设计及反思

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2019新人教高中英语选择性必修三Unit 3 Environmental ProtectionReading and Thinking公开课教案Teaching aims:1.Enable students to know about climate change and summarise the main idea of each paragraph.2.Guide students to learn about the“greenhouse effect” and create a diagram describing how it works.3.Help students to analyse the consequences of climate change and enhance the awareness of environmental protection.4.Voice your personal opinions about how to deal with climate change.Teaching key points:   Figure out the main idea of the text and the topic of each paragraph.   Analyse the consequences of climate change and enhance the awareness of environmental protection.Teaching difficult points:   Learn about the “greenhouse effect” and create a diagram describing how it works.   Voice their personal opinions about how to deal with climate change.Teaching procedures:StepⅠDiscuss the Opening PageView the Opening Page of this unit and answer the questions below.1.Where do you think this photo was taken?2.What does this photo make you think of?Suggested answers:1.I think this photo was taken in either the Arctic or Antarctica,as those places have large ice sheets like this.2.This photo makes me think of the earth is becoming warmer—global warming,which causes great damage.StepⅡPre-reading Predict what aspects about climate change will be talked about in the text.Before your reading,list details in the first two columns.Fill in the last column after reading.Climate change—global warmingWhat I Know (K)What I Want to Know(W)What I Have Learnt (L)    Look at the title “Climate Change Requires the World’s Attention”,the graphs and the pictures Page 26,answer the following questions.1.Where would you most likely find this text?2.What is the graph about?What information can you get from it?3.Guess what might happen to the polar bear in the photo?How did it die?4.What do you think will be talked about in the text?Suggested answers:Climate change—global warmingWhat I Know (K)What I Want to Know(W)What I Have Learnt (L)global warming;carbon dioxide;sea level rises;Polar animals are losing home;water resource shortage;coastal cities could be flooded...I want to know how the greenhouse effect works,and more measures we should take to prevent global warming.“natural” greenhouse effect;“man-made”greenhouse effect;make policies;reduce“carbon footprint”1.In a science magazine.2.The graph is about the global surface temperature during 1920-2016 base period.The temperature of the global surface rose about 1.2℃ from 1920 to 2016.The Earth is becoming warmer and warmer.3.The polar bear lying on the ground is dead.It is “skin and bones”.Maybe it has starved to death because of food shortage caused by climate change.4.The text will talk about the reasons and impacts of global climate change,and what we humans should do.StepⅢ　While-reading Activity 1　Reading for the main idea and the structureSkim the text and match the main idea of each paragraph.Paragraph 1　A.The reasons causing the increase in temperature.Paragraph 2  B.Introduce the present situation about climate change.Paragraph 3 C.A real case showed the great impact the increase in temperature had on Earth’s ecology.Paragraph 4 D.What should we human do about global warming.Paragraph 5 E.The serious consequences of global warming.Suggested answers:Paragraph 1:BParagraph 2:CParagraph 3:AParagraph 4:EParagraph 5:DActivity 2　Reading for details Suppose you were Li Ming.You are invited to attend the World Economic and Environmental Conferences.And you will be interviewed by a journalist.Please answer his questions with what you learn from this text.Read Paragraph 1 & Paragraph 2 carefully and answer the questions.1.What happened to the Earth?Can you list some evidence of it?2.What happened to the polar bear in the photo?How did it die?Why did the writer write about it?Suggested answers:1.The global climate has changed.The Earth is getting warmer and warmer.A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change in the global climate.2.The polar bear in the photo died of starvation.Low sea-ice levels caused by climate change made the bear couldn’t hunt seals as before.It had to travel greater distances in order to find food.The writer wrote about it because it showed one of the effects of rising temperatures due to climate change.The seriousness of global warming is better illustrated by a real case.Activity 3　Read Paragraph 3 carefully and create a diagram describing how the greenhouse effect works.1.What caused the increase in the global average surface temperature?2.Create a diagram describing how the greenhouse effect works.3.What are the consequences of high greenhouse gas emissions?Suggested answers:1.It is the “greenhouse effect”,including the “natural” and the “man-made” greenhouse effect.2.The diagram describing how the greenhouse effect works.3.High greenhouse gas emissions lead to more heat energy being trapped in the atmosphere and rising temperature.Activity 4　Read Paragraph 4 carefully and finish the mind map.What are the results of the rise in temperature?Suggested answers:Activity 5　 What we should do about global warmingGovernments:1. _________________________2. _________________________Individuals:1. _________________________2.___________________________Suggested answers:Governments:Make policies;Take appropriate actions and measures to reduce greenhouse gas emissions.Individuals:Reduce our “carbon footprint” by restricting the amount of carbon dioxide our lifestyles produce.Seize every opportunity to educate everyone about global warming.StepⅣ Post-reading—Critical and Creative ThinkingDiscuss these questions in groups.1.Who do you think should take responsibility for dealing with climate change?(individuals,large business companies or governments)2.“We individuals can also reduce our ‘carbon footprint’ by restricting the amount of carbon dioxide our lifestyles produce”.What can we do to live a low-carbon lifestyle?Suggested answers:1.For example:Every individual can make a big difference.I firmly believe that each individual citizen cannot sit back and say it is someone else ’s responsibility to protect environment.We must play our roles in the society.2.The answers vary.StepⅤ Homework1.Finish what you have learned in the last column of KWL chart.2.Earth Day is on April 22nd every year.In order to raise public awareness of existing environmental problems and mobilize people to participate in the environmental movement,the city will hold a speech contest this weekend with the theme of “Green life,save our home”. As a representative of your school,you will take part in the contest.Please prepare your speech.Suggested answers:1.I have learnt many useful words and expressions to discuss climate change.Learn about what the “natural” greenhouse effect and the “man-made” greenhouse effect are.What can we do to deal with global warming.2.Ladies and gentlemen,I am honoured to stand here to share with you on such an important subject as climate change.Yes,it is global warming.Let me give you two phenomena.Here is the first one.More and more people are used to using air conditioning but how many people have ever thought whether this new hobby will bring side-effects or not?Maybe just few people.In fact,the side-effect is apparent.The gases exhausted from air conditioning contain a lot of methane which could cause global warming.By the way,air conditioning will waste a lot of electricity.The second one is about the increasing number of cars.According to the statistics,in the 21st century,there are 7 millions cars in the world,a large number of exhaust gases has seriously influenced us,such as:cough,throat inflammation.These two phenomena are just a few parts of reasons which change our environment badly.There are many other reasons. In the nearly 100 years,the global average temperature experienced fluctuations twice.Generally,it is the trend that the global climate is becoming warmer and warmer.In 1980s,the global temperature rose apparently.According to Chinese scientists,the average temperature in China has risen by 1 degree centigrade in the last 5 decades.It is higher than the reported global average.We are seeing more frequent bouts of extreme weather.In many parts of the country,environmental damage and climate change are realities for us.In my opinion,it is high time for us to take action.In order to save the earth,we should try to do things below:no air conditioning,use recycled paper,abandon meat food,don’t use plastic bags,take a bus.It is little drops of life.As long as everyone takes action,it will be a powerful strength to rescue our planet.All countries are supposed to take the legislative initiative as soon as possible.Only in this way can the global warming be put under control.