2019学年度人教版选修八Unit 2 Cloning the first period Warming up and reading教案设计

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.

A. Dolly the sheep B. A strawberry plant

C. 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