人教版英语高一必修一Unit2-Warming-up、Pre-reading、Reading、Com课件.ppt

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1、人教版英语高二选修八Unit2 cloning Reading 凤山中学 凌燕凤 Part 1 Teaching aims:A）Knowledge aim:the students is supposed to have a good command of the main idea of the text and know the advantages and disadvantages of cloning B）Ability aim:this lesson aims to improve students ability of finding some specific informat

2、ion in the reading.In addition,after the lesson,students should have a good knowledge of what cloning is and can express their ideas freely about the issue whether it is right or not to clone humans by using the words they have learned.C）Emotional aim:Make the Ss aware of the problems cloning may br

3、ing about,and reach a mutual opinion of life value.Part 2 Teaching important points:Know the advantages and disadvantages of cloning Part 3 Teaching difficult points:How to find the needed information in a limited time.Part4 methods and aids 1.Teaching method:Question-and-answer activity teaching me

4、thod Free discussion method Pair work or individual work method 2.Teaching aids:a projector:a tape recorder multimedia the blackboard Part 5 Teaching procedures Which ones are natural clones?Which ones are man-made?How do they differ?Warming up-1mins富贵竹插枝即活Lucky bambooDolly the sheep and its babyClo

5、ned rabbit克隆的荧光小猪(左)和正常小猪(右)克隆马及其“母亲兼姐姐”TwinsNatural clone is one that occurs in a natural form of cloning without human help.Man-made clone is one that produced through human intervention(介入).Dolly the sheepShe was cloned while the others were born naturally.In other word,Dolly was a _ sheep.cloned

6、How does Dolly differ from other sheep?Pre-reading 2mins In pairs discuss what you understand about clothing.1.What is a clone?2.How is a clone produced?3.What benefits can humans gain from cloning?4.What problems may arise when humans are cloned?5.6.Questions about cloning1.What is a clone?A clone

7、is a group of cells or organisms that are genetically identical and have been produced asexually from the same original cell.They include natural and man-made clones.2.How is a clone produced?The cloning of plants is simple and relatively easy.It can be done by taking cuttings(man-made cloning)or le

8、tting the plant produce its own runners(natural cloning).The cloning of animals is more complicated.It was not achieved until 1996 and is fully explained in the first reading.3.What benefits can humans gain from cloning?1)Medical cloning can help cure serious illnesses that ruin ones quality of life

9、(such as Parkinsons disease or Alzheimers disease).2)It can help infertile people have babies.4.What problems may arise when humans are cloned?1)People may want to clone themselves so they can live forever.2)People may want to clone dead children.3)People may want to clone their favorite pets.CLONIN

10、G:WHERE IS IT LEADING US?Predict:To which question from our list the answer might be found in this passage?Cloning is a way of making an exact copy of another animal and plant.What is cloning?Cloning happens both in _ and in_.They can be cloned by _ and _.plantsanimalsthemselveshumansNatural cloneMa

11、n-made clonePara 1 Read and fill the blanksCareful Reading-20mins1.How many major uses do cloning have?Firstly,commercial Secondly,research2.When was the cloning of Dolly the sheep born?Why did the scientists succeed in cloning it?Para 2Read together1996.It was their determination and patience that

12、paid off.The major uses and breakthrough of cloningAt first,the fact that Dolly developed _ in a natural way was _.Later,the news _she lived for six years,half the length of the life of the _ one was _.Finally,the problem that occurred to the scientists was that a cloned animal lives_ than the origi

13、nal one.Para 3The problems of Dollynormallyencouragingorginalthatdisturbingshorterread freely1.The fact that she seemed to develop normally was very encouraging.2.Then came the disturbing news that Dolly had become seriously ill.Appositive clause We can infer from the last three paragraphs that _.A.

14、The normal development of Dolly had no effect on the cloning of other species.B.Dollys serious disease and final death disturbed the whole world.C.Dolly successfully cloned a new lamb with the help of cloning scientists.D.There were arguments about animals about animal cloning and concerns about the

15、 future of cloning.Para 4&5The impact and peoples reaction to cloning the author does not state any personal opinion about cloning.A.Objective(be fair)B.Negative(be against it)C.Positive(be in favor of it)The writers attitude towards cloningBecause_Post-reading-5mins Write the letter“T”if the statem

16、ent is true.Write“F”if it is false.1.Cloning means making a copy of an animal or a plant.2.Gardeners can make a lot of money by cloning plants.3.Cloning animals is as complicated as cloning plants.FFT4.Dolly the sheep was the first successful clone of a mammal5.Natural clones happen in animals as we

17、ll as in plants.TTPractice:Retell the procedure of cloning Dolly the sheep克隆羊诞生图示Discussion-5mins Look at these pictures below at first.They have the same face.People are no longer special to each other.Cloning people is a good thing or a bad thing?Do you want to have a clone one of yourself or a clone brother or sister?Why or why not?Write a passage titled Is cloning good or bad?Your passage should include the following：1)What is cloning2)Advantages of cloning 3)Disadvantages of cloning4)Your opinion of itHomework-1mins