高一英語(yǔ)下冊(cè)Unit 19教案

《高一英語(yǔ)下冊(cè)Unit 19教案》由會(huì)員分享，可在線閱讀，更多相關(guān)《高一英語(yǔ)下冊(cè)Unit 19教案（30頁(yè)珍藏版）》請(qǐng)?jiān)谘b配圖網(wǎng)上搜索。

1、3eud教育網(wǎng) 百萬(wàn)教學(xué)資源，完全免費(fèi)，無(wú)須注冊(cè)，天天更新！ Unit 19　Modern agriculture Ⅰ.Teaching Goals: 1.Talk about modern agriculture and the effects it has on people's life. 2.Practise giving advice and making decisions. 3.Use “It” for emphasis. 4.Read statistical graphs. 5.Write a plan for a vegetable garden. Ⅱ.T

2、eaching Time: Five periods Ⅲ.Background Information: 1.An American Small Farm Last year,at harvest time,we visited the Steenhoek farm,which is 2 200 mu,or 340 acres.Typical family farms are run entirely by family members,with every member playing a vital part in the operation.Both of these famil

3、ies are descendants of Dutch immigrants who settled here over a century ago. The Steenhoek farm supports 3 generations.The family of Mr.and Mrs.Steenhoek includes three children and 2 grandchildren.As we will see,this family is an excellent example of hardworking,experienced farmers who stay on the

4、 land not purely because of profit,but because they are living a life-style that satisfies them.Sixty percent of the Steenhoek's acres are devoted to pasture land,on which they raise 120 beef cattle.The rest of the land is used for growing corn. Fifteen years ago,the American farm economy was boomi

5、ng.Farmers could specialize,raising one crop,or one type of animal.Today,with an uncertain farm economy,such an idea is considered foolhardy,and diversifying is one way that farmers can lesson their risk of loss.For example,if weather affects the size of a crop,the sale of the livestock will make up

6、 the difference.If the animals are plagued by disease,at least there is grain to take to market. Kendall Steenhoek,Simon's eldest son,divides his time between running this machine shop and farming zoo acres of corn.He attended a community college in Iowa for two years to study diesel mechanics.Then

7、 he opened this repair shop for farm machinery.Kendall also plants and harvests over 30 000 bushels of corn each year,but it is the income from the repair shop that has enabled him to stay within the farming community.The heavy equipment used on the farms today is in constant need of maintenance,and

8、 requires precision tooling for repairs.By far,the most impressive and certainly the most costly piece of farm equipment used on a small farm is a harvesting machine called a combine,which can cost up to $100 000. This type of machinery is what makes the American farm so efficient.With a combine,on

9、e man and his family can harvest an entire crop of a 500 acre farm in two weeks.The value of the combine is that it performs several functions.As it moves through a field of corn,this sophisticated machine cuts the stalk,plucks the ear,discards the stalk,shucks the corn kernels off the ear and depos

10、ites the kernels in a storage bin in the back.Then,a spinning device in the rear of the combine shreds the husks and shafts and scatters them across the field,to serve as mulch,cutting down on the possibility of soil erosion from winter rains.The machine is even more amazing when you think that it h

11、as been in use on American farms for only one generation. 2.Genes Every living cell contains genes.They are too small to be seen in a microscope,but they are vitally important.Each set of genes in the body contains all the instructions needed to make a human being.Some genes determine hair color.S

12、ome determine the shape of a nose.Some genes help determine your height and even your weight. Genes are made of a chemical called DNA—the letters stand for deoxyribonucleicacid(脫氧核糖核酸).In the early 1950's,two scientists,Francis Crick and James Watson,figured out how the parts of DNA fit together.On

13、ce scientists understood this structure,it became possible to take pieces of DNA apart and put them together in new ways.New kinds of genes could be made in this manner. Scientists have studied the genes of many plants and animals.They have worked out which genes affect the color of a tomato and th

14、e stickness of its skin.Working out which genes determine which features is called genetic mapping,scientists have begun the Human Genome Project,an ambitious effort to map all the genes in the human body. Some genes may be effective.For example,something might be wrong with the gene that makes blo

15、od clot(凝聚).An individual born with this defective gene could suffer serious hemorrhages(出血)or even bleed to death because his or her blood fails to clot.If scientists ever learn how to map all the genes in our bodies,they could determine whether or not an unborn child has any defective genes.They m

16、ight even discover how to treat these genes before the child is born. The First Period Teaching Aims: 1.Improve the students' speaking ability by practising giving advice and making decisions. 2.Enable the students to master the expressions of giving advice and making decisions. 3.Get the stude

17、nts to learn more about agriculture. Teaching Important Points: 1.How to express oneself,using what is learned or given. 2.How to advise sb.to do something and how to make decisions. Teaching Difficult Points: 1.The usage of some expressions. 2.How to improve the students' listening ability.

18、Teaching Methods: 1.Listening some materials to improve the students' listening ability. 2.Discussion to let the students express themselves freely. 3.Group work or pair work to give every student a chance to express themselves. Teaching Aids: 1.a tape recorder 2.a projector and some slides 3

19、.a computer Teaching Procedures: step Ⅰ.Greetings and Revision T:Good morning,everyone. Ss:Good morning,teacher. T:Sit down,please.In this class,I'll check your homework first,Wang Ping,read your homework to us,… (The teacher checks the students' homework and have a discussion with the student

20、s about the mistake Wang Ping made.Let the students have a clear understanding and correct it.) step Ⅱ.Preparation for listening and speaking T:Today,we're going to learn a new unit,Unit 19,Modern Agriculture(Teacher writes the following on the blackboard:Unit 19 Modern agriculture,the First Perio

21、d).First,let's learn the new words of this period.Look at the screen: New words: produce n.產(chǎn)量、產(chǎn)物、農(nóng)產(chǎn)品 effect n.結(jié)果、影響、作用 dike n.堤壩；排水溝 drought n.干旱 leader n.領(lǐng)導(dǎo)者　 lead v.領(lǐng)導(dǎo)、帶領(lǐng) cane n.細(xì)長(zhǎng)的莖、藤條 sugar-cane n.甘蔗 tobacco n.(煙草)制品；抽煙 local adj.地方的、當(dāng)?shù)氐? (Teacher asks one student to read the new word

22、s,then corrects the mistakes the student made.) Step Ⅲ.Warming up T:Please turn to Page 32.Let's do Warming up.(Teacher shows the graphs on Page 32 on the screen.)Look at the two graphs and discuss the questions on Page 32.You can do it in pairs or groups.In a few minutes,I'll ask some students to

23、 talk about them.(Students begin to discuss the questions.And teacher goes and joins them.A few minutes later,teacher says the following.) T:Are you ready?Who can give us a talk about the first topic?SA,how are people's eating habbits changing over the years? SA:From the first graph,we can see tha

24、t the eating habits of the people in our country have changed greatly.Before 1949,they had not enough to eat and often went hungry.Once natural disasters happened,a great number of people would die of hunger.Before the reforming and opening to the world,grain was still a big problem.People mainly li

25、ved on corn and few kinds of vegetables.Since the 1980s,especially the 1990s,people's eating habits have greatly improved.People can eat whatever they want.More and more people eat less grain,more meat and eggs and so on.More and more people turn their eyes to meat,eggs,milk and all kinds of green v

26、egetables. T:Why do you think this happens,SB? SB:It is all because of the Party's good policies. T:Very good.It is true and everyone can see that.How has agricultural produce changed during the first half of the 1990s?And what do you think caused these changes? SC:From the first half of the 199

27、0s,scientists started to develop new techniques to increase agricultural production without causing damage to the environment.Especially the new technique, “GM”,has made agricultural production increase continuously.Scientists develop new kinds of seeds,better cows,pigs,sheep as well as fish.It is t

28、he new techniques that make all this possible. T:Do you agree with him,SD? SD:Yes,I do.And I want to give an answer to the three question. T:Good,please say that. SD:With the changes in people's eating habits,agriculture as well as nature will have to change,too.People are eating more meat and m

29、ilk.That is to say,they need more fish,pigs,sheep and cattle as well as poultry.To feed these animals,we need more grain,especially more grass.To protect our environment,the ways to raise animals have changed.With the development of modern science and techniques,some of the fields are not needed to

30、produce more food.We can grow grass,flowers etc.on them.Less farmers are needed and they can do other kinds of work. Step Ⅳ.Listening T:So much for the discussion.Next we'll do listening.The passage you'll listen to is about farming.It tells us about farming of all countries in early times and pro

31、tection of nature and environment.Listen to the tape carefully and do the exercises concerned.Now,read the requirements,please.(Students read the requirements.)Now do you know what you'll have to do after listening to the passage?(Ss:Yes.)During listening,I'll play the tape three times.After listeni

32、ng for the first time,you can leave over the ones you are not sure about.You can do them when I play the tape for the second or the third time.Check your answers with your partner after listening.Are you clear?(Ss:Yes.)(At last,teacher shows the answers on the screen.) Step Ⅴ.Speaking T:Now let's

33、do speaking.This part says that a group of farmers in your area have been given a large piece of land.The villagers together with the village leader have to decide how to use the land.Work in groups of five students.Each group member will play one of the roles.Prepare role cards,discuss the problem

34、and try to make a decision.Before discussion,who can give us some useful expressions about giving advice and making decisions? Giving advice: SE:My advice would be….I advise you to do…. SF:I think you ought to….You.d better…. SG:If I were you,I would…. I would advise you. SH:I don't think you

35、ought to…. Making a decision: SI:In my opinion,we should… I think/believe you should… SJ:I don't think it is necessary to do sth.….We must decide…. SK:I hope we can make a decision. (Teacher writes all the expressions above on the Bb.) T:Now let's have a discussion,using the expressions on th

36、e blackboard later,I'll ask some students to act it out. Sample diaolgue: Sa—villager A;Sb—villager B; Sc—villager C;Sd—villager D Se—the village leader Se:As we all know,we are given a large piece of land.I've got all of us here to have a discussion and decide how to use the land.Please give u

37、s your advice. Sa:I advise we should grow corn on this piece of land.It's large and flat and machines can go up and down it,so we can spend less time and get more corn.A lot of money can be made after selling the corn. Sb:I think we ought to build a farm there and raise pigs or cows with the grai

38、n we harvest.So we can make more money. Sc:My advice is that we should turn it into a garden,and grow flowers there.Then we can sell the flowers.There is nobody here selling flowers.So I think our business will surely be good.Besides,sometimes selling grain or meat is hard,for the price could be to

39、o low. Sd:I think we'd better design it like this:We build a building of a few floors.In each floor,we can raise one kind of animals.With their wastes,we can raise fish or grow vegetables on the top or in the space which faces the sun.We can also grow mushrooms in the dark places.We can use one qua

40、rter of it to do this and build a garden on one quarter so that people can enjoy themselves here.Half of the rest grow flowers to sell and for the other half we can grow grass on it so that our environment will be better. Sa:That's a good idea.But it will need a lot of money to do this.I hope we ca

41、n make a decision today. Se:We must make a decision.My opinion is that we do as SD said.Any other opinions? Sb and Sc:I agree with you. Step Ⅵ.Summary and Homework T:In this class,we've talked about two statistical graphs and listened to a passage.We have also talked about how to use a large pie

42、ce of land,using some expressions of giving advice and making deicisions.These expressions are:“…”(Pointing to the blackboard.)After class,choose a subject as you like with your pratner and have a discussion,using the expressions on the blackboard.That's all for today.Class is over. Step Ⅶ.The Desi

43、gn of the Writing on the Blackboard Unit 19　Modern agriculture The First Period Giving advice:My advice would be…. I advise you to do…. I think you ought to…. You'd better…. If I were you,I would…. I would advise you…. I don't think you ought to…. Make a decision:In my opinion,we should….

44、 I think/believe we should…. I don't think it is necessary to do sth. We must decide…. I hope we can make a decision. Step Ⅷ.Record after Teaching _____________________________________ _____________________________________ _____________________________________ ______________________________

45、_______ The Second Period Teaching Aims: 1.Enable the students to learn something about modern agriculture from the text. 2.Enable the student to master the new words and expressions in the text. 3.Get the students to have the ability to grasp the general idea of an passage as fast as possible.

46、 Teaching Important Points: 1.How to improve the students' reading ability. 2.How to get the students to master the new words and expressions of the text. Teaching Difficult Point: How to improve the students' reading and writing ability. Teaching Methods: 1.Discussion to raise the students'

47、interest in agriculture. 2.Ask-and-answer method to help the students understand the text better. 3.Free talk to improve the students' speaking ability. Teaching Aids: 1.a tape recorder 2.a projector and some slides 3.a computer for multimedia use Teaching Procedures: step Ⅰ.Greetings and Re

48、vision Greet the whole class as usual T:At the end of the last period,I asked every one of us to join in a discussion.Now I'll ask a group to repeat the discussion.Who will act it out for us?Wang Hong,act it for us with your group,will you? Wang:Yes.… (Teacher asks two groups to repeat their dis

49、cussion before the class.) step Ⅱ.Preparation for Reading T:So much for revision.Please turn to Page 113.Let's learn the new words and expressions together.Li Ming,read the new words and expressions of this period,please.Begin with the word“arable”and end with the word “soil”. (Teacher and the st

50、udents learn the new words and expressions together.Teacher corrects students' mistakes in pronunciation and gives simple explanations of some words if necessary.) T:Are there any students coming from the countryside in our class? Ss:Yes.A lot of us students are from peasant family. T:Have you ev

51、er worked in the fields,Wang Fei? Wang:Yes.I often work in the field with my parents.I can do a lot of farm work. T:Have you ever heard of anything about farming in the past? Ss:Yes,I have. T:Now turn to Page 34.Let's do pre-reading.Discuss the questions.Group work.Write your answers on a piece

52、of paper. (After a few minutes.) T:Are you ready?(Ss:Yes.)Who would tell us something about traditional and modern farming? SA:In the past,farmers grow crops in the traditional way:Use cattle to plough the field;farmers work in the field most of the day all year round,but they could not produce e

53、nough food for the whole population.Now they grow crops in the modern way.They use modern techniques in their fields,such as chemical fertilizers,greenhouses and so on. T:Who would answer the second question? SB:I'll try.The advantages are:chemical fertilizers,electronic pumps and other advanced t

54、echnology are used.Farmers can spend less time on farms and much more grain is produced.The disadvantages are:the air,the water and the soil round us are more or less polluted. Sc:I'll say something about other changes that have taken place on farms in the last 100 years.In the past,we depended on

55、heaven and we could do little when natural disasters happened.Now,we can do artificial rainfall.GM makes better seeds possible.In the same fields,better seeds can give us much more grain.Besides,all kinds of scientific ways of farming are used in farming.Farmers in our country are becoming richer an

56、d richer day by day. T:Very good. Step Ⅲ.Fast Reading T:Now read the text fast and then answer the questions on the screen. 1.When was more advanced technical information was brought in from abroad? 2.What is important for future agriculture? What should future agriculture depend on? 3.What d

57、oes“which”refer to in the last two lines? (After a few minutes.) T:Are you ready? Ss:Yes. T:Please give us the answers to the questions. SD:In the 1980s,more advanced technical information was brought in from abroad. SE:Both food production and taking care of the environment are important.And

58、future agriculture should depend on high technology as well as traditional methods. SF:I think taking care of the environment is more important.Because we have only one earth. Sa:In the last two lines,“which”refers to“golden rice”. T:What is the other name of “golden rice” in the text? Sa:GM ric

59、e. Step Ⅳ.Reading T:Now read the text again and answer the questions in Post Reading.If you are not sure about your answers,have a discussion with your classmates. (After the students' discussion) T:Please turn to Page 35.Let's answer the questions.SH,give your answers to the first five question

60、s. SH:They are:1.D　2.A　3.C　4.C　5.C T:Is he right? Ss:Yes,he is right. T:Now let's do Part 2. SI:I want to change apples.I want them not only to grow bigger and more delicious,but also of the same size.Because some of the apples now are smaller and not delicious and the apples of the same size a

61、re popular in the market. SJ:I want to change fruit trees.I want them to grow shorter so that the fruits on them are easy to pick up.And they must give us more fruits so that the farmers can make more money and become richer. T:That's a good idea!I have the same opinion as you. SK:I want to chang

62、e carrots.I want them to grow much bigger.Because the carrots our villagers grow are smaller. SL:I want to change the vegetables people usually eat.I want them to be better for people's health.So they will spend less money on medicine. SM:I want to change cows.I want them to have more babies.So th

63、ey will not be expensive to buy.If so,more farmers can buy them and become rich. SN:I want to change fruit trees.I want to plant the trees growing in the south.So we will have more kinds of fruits than ever before. T:You've done well.After class,continue to think about more good ideas.Now I'll exp

64、lain some expressions and language points of the text to you.Please look at the screen. modernize v.to make(sth.)suitable for modern use or for the needs of the present time. e.g.He spent a lot of money modernizing his house. depend on:Health depends on good food,fresh air and enough sleep. shor

65、t of:He didn't buy anything because he was short of money. control v.have power over(sb.or sth.),rule,direct The machine is controlled by this button. control one's anger stand for:USA stands for the United States of America. modify:to change(sth,such as a plan,an opinion,a condition,…) To mod

66、ify anything is to change it a little. T:(After explaining the words and expressions on the screen.)Now read the text and see if you still have something you find difficult to understand. (Teacher goes among the students to explain any questions raised by the students.) Step Ⅴ.Listening and Reading Aloud T:Let's listen to the tape.I'll play it twice.The first time I play it,just listen.When I play for the second time,you can read the text after it.Then please read the text