宝鸡市石油中学张海娟.doc

Unit 2 CloningReading Period 1 （教案）（修 订 稿）宝 鸡 市 石 油 中 学张 海 娟2009-5-248.5选修8 Unit 2 CloningReading Period 1 宝鸡市石油中学 张海娟Teaching aims:1）Enable the students to describe cloning: What is the advantages of cloning？ What is the problems or dangers of cloning？ What is their opinion of cloning？2）Students practice reading skills Teaching important and difficult points:1） What are the advantages of cloning?2） What are the problems or dangers of cloning? 3） What are their opinions of cloning？Teaching methods:Fast and careful reading; asking and answering.Teaching aids:A blackboard and a computerTeaching procedures: Step: Lead inWe have already finished warming up. I believe you have got some information about cloning. Now, who can tell us what kinds of things have been cloned successfully?S: sheep.T: Good. Could you answer the question in a complete sentence: “Sheep have been cloned successfully.”Then, ask another two students to answer the question in a complete sentence.Step : show some pictures about the important events in cloning history. Step : use a picture and the question “Do you want to be cloned?” “Where is cloning leading us?” to arise Ss interest in the Reading text. Step : words revision First：show the Ss two columns on the screen.Second: ask some Ss to match these two columns. Finally: the teacher help the Ss to correct the pronunciation.Step : Fast ReadingFast-reading : ask the Ss to put the main idea of each paragraph in the right order.Para 4 : The effect of Dolly.Para 2 : Cloning has two major uses.Para 5 : Peoples attitude towards cloningPara 3 : The problems of Dolly.Para 1 :Cloning is a way of making an exact copy of another animal and plant.Step : careful ReadingLet the Ss read the text carefully with the tasks as follows1. The lamb is the clone of the cell from sheep because_. A. it provides the egg cell B. it gives birth to the lamb C. it provides the nucleus D. it is a female sheep2. Which of the following is not an advantage of cloning?A. Cloning can be used for medical purposes. B. Large quantities of food can be produced by cloning.C. Cloning can help keep animals from becoming extinct.D. People can clone themselves at will.3. The sheep that donated the somatic cell most probably lived _ years. A. 3 B. 6 C. 9 D. 124. What about the writers attitude toward cloning in this passage?A. The writer is against cloning.B. The writer is in favor of cloning.C. The writer does not state any personal opinion about cloning.D. The writer is in agreement with cloning.Keys: 1.C 2.D 3.D 4.CStep : Listening with the following task: True or False 1. Cloning means making a copy of an animal or a plant.(F)2. Gardeners can make a lot of money by cloning plants. (T)3. Cloning animals is as complicated as cloning plants. (F)4. Dolly the sheep was the first successful clone of a mammal. (T)5. Natural clones happen in animals as well as in plants. (T)Step : Retell the text1. Fill in the blanks according to the text 1) Cloning is a way of making an exact copy of another animal or plant.2) Cloning plants is straightforward; Cloning animals is very complicated.3) At last the determination and patience of the scientists paid off in 1996 with a breakthrough.4) Cloning scientists were cast down to find that Dollys illness were more appropriate to a much older animal.5) Cloning became controversial .So some governments began to reform their legal systems and forbade research into human cloning.6) China and the UK continued to accumulate evidence of the abundant medical aid .2. Use the following conjunction words (and, but, while, on one hand, on the other hand , although, however etc) to join the sentences above in order to make the sentences a sh