模块五第二单元welcome.doc

高二英语 “学 议 练 探” 学案 M5 U2Welcome to the unitTeaching aims:(1) Make students pay attention to the environment around realize the problems caused by human activity. (2) Encourage and help students to think of the solutions to solving the problems(3) Practice their speaking ability by discussing in groupsImportant points & difficult points:(1) Students are expected to express their own opinions on protecting the environment in English(2) How to encourage students to speak freely.Part 1 PreviewThinking before class(1) When we talk about the “environment”, what words will come to your mind?Suggested answer: harmonious/ peaceful/ destructive/ pollution/ disaster/ protection/ environmentalist(2) What kind of natural disasters do you know?Suggested answers: flood/ drought/ acid rain/ desertification/ tsunami/ volcanoPart 2 Study in classStep1 Brainstorming T: Tell the students what they will learn in this period and let them pay attention to the title of the unit. Ask them think about what will be discussed in this unit.(This can focus their attention on the theme of this unit. T can let them exchange their information with their desk mate. Any related answers are collected some on blackboard) T: (Very good!) Tell the students the earth is the only planet in the solar system which human beings can live on. And it is also the most beautiful one in the eight planets. Then let them think about the following questions: What is your picture of earth in your mind?(After this question T can let them watch a short video to help them go on with the next steps) What are the environmental problems in your living surroundings? Do you think a healthy environment is important four human beings? Why?(Let them use some words to describe the earth and relate the topic to their daily life.)Step 2 DiscussionT: Tell the students they will learn something more about the environmental problems and the causes of them. Then ask students to look at the pictures in the book. Ask them tell what they can see in these pictures. If they have any difficulties T can give them a hand. Later let them answer the question: Which ones are caused by nature and which ones are caused by man?(Rubbish, smoke, cutting, water pollution are caused by man and the others by nature.)Step 3 Further discussionT: Tell the students besides natural disasters, the earth is now facing other problems caused by people. Then ask them to look at the screen. The picture is about some ways in which people damage the environment. Let them think about the question below. Can you think of other ways in which people damage the environment?(air pollution, etc)(Let students share their information in pairs and show them on the screen. This may help them to realize some irresponsible human activity.) T: Tell the students the environmental problems are becoming more and more serious, especially the increasing rubbish, cutting trees, water pollution and air pollution. Later let them think about the following question: What are the causes and results of these environmental problems?(Meanwhile show them some relevant pictures which may give them a hand.) T: After the discussion, collect some key words in the following table and show it on the screen. In this way, the students can have a general idea of what they have talked about just now. this step also help students get ready for the last step. ProblemsCausesResultsRubbishpour waste, un-reused products,etc.dirty, ugly, dangerous, cause diseases, etc.Cutting treesmeet peoples needs, make woodenproducts, etc.lose water and soil, desertification, bad weather, etcWater Pollutionpour waste, throw rubbish, etcno enough drinking water, get people sick, etcAir pollutiongive off waste gas, burn coal and oil, etccause diseases and deaths, dirty, cause acid rain, etcT: After this let the students consider the question below. Ask them discuss it in groups of four. Remind them to make use of what they have learnt above. Any reasonable or related answers are acceptable. Encourage them express what are in their mind freely What can people do to solve these environmental problems? Suggested Answers:1) Throw waste in rubbish bins. Recycle as much as possible.2) Use less wood. Plant more new trees. Try to make desert areas become green land.3) Treat the waste water before pouring it into rivers. Clean the water in the rivers/lakes. Save water in our daily life.4) Make smoke harmless before it goes into the air. Limit the number of vehicles. Develop clean energy.(After checking the answers as a whole, show the suggested answers on screen and tell them these are only some the measures people can take to protect the environment.) Part 3 Practice in classFill in the blanksOur s_ are being polluted faster than ever and it seems that people cannot prevent it. Time is b_ us more people. And more people will bring us more industries, more cars, large cities, the growing use of man-made materials.What can explain and settle this p_? The fact is that pollution is caused by the desire for a m_ way of life. We make “increasing industrialization” our first a_. So we are often ready to offer everything: clear air, pure water, good food, our health and the f_ of our children. There is a constant flow of people from the countryside into c_, eager for the achievements of our modern s_. But as our technological achievements have grown in the l_ twenty years, pollution has become a s_ problem.Suggested answer: surroundings/ bringing/ problem/ modern/ aim/ future/ cities/ society/ last/ serious Part 4 Exploring after class Project: oral reportWhat can you do to reduce waste pollution and protect our environment?(Prepare the question and try to give an oral report in the next class.)Teaching reflection 4