高中英语优秀教案：Unit2 Cloning（新人教版选修8）.docVIP

Unit 2 Cloning The First Period warming up Aims 1. Talk about cloning 2. Practice expressing and supporting an opinion Contents Task one: Looking and speaking In pairs, look at the pictures and discuss which ones are natural clones and which ones are man-made. Explain how they differ. Dolly the sheep B. A strawberry plant Twins D. Identical dogs Task two: Questions about cloning What is a clone? How is a clone produced? What benefits can humans gain from cloning? What problems may arise when humans are cloned? Task three: Free talk In pairs, discuss what you understand about cloning, then list the questions you want to find out. Share your lists with one another. 1. Should we clone human?2. Could cloning replace sex as the means of creating new human life?3. Could a parent clone a child who is dying of a terminal illness? The Second Period Reading Aims: 1. Help the Ss to know how to describe cloning and how to catch the details of the text. 2. Activate the Ss to show their opinions about the cloning and enable the Ss to write and article on this debate. Contents: Leading in by revision. Task one: Fast reading What is a clone? Show the following. 1. Cloning means making a copy of an animal or a plant. (F. exact… another) 2. Gardeners can make a lot of money by cloning plants.(T.) 3. Cloning animals is as complicated as cloning plants.(F. more than) 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) Task two: Careful reading Read the text again, try to answer the following questions and find out the main idea of each paragraph . Questions: 1. What’s the main idea of the text? 2. How many years did the sheep that donated the somatic cell most probably live? 3. Why did the Cloning of Dolly the sheep succeed? 4. What does the word ‘straightforward’ mean in the second paragraph? 5. What is the writer’s attitude toward cloning in this passage