高二英語教案：《Unit 2 Cloning. 克隆》教學(xué)設(shè)計（二）(2)

　　Discussion

　　In this part the students will discuss the relationship between the development of technology and social customs.

　　T: As the technology develops day by day, it has a more and more important influence on the whole society. Technology affects social customs and ethics, sometimes technology may go against the conventional thinking, then comes the problem that whether we should stop the development of research or change the ethics.

　　S1: As technology develops in almost every field, a lot of our original customs and ethics changed, either because they are out of time or not so scientific. For example millions of years ago human ate meat of animals without heating them. Later people used fire and no longer ate raw meat and they also used fire to scare dangerous animals.

　　S2: I think we could not stop the development of technology, for it may develop in the way which is acceptable by social customs.

　　…

　　Look at pictures

　　T: Look at the pictures and discuss which ones are natural clones and which ones are man – made. Then explain how they differ.

　　S: I think the twins are natural clones and the Dolly sheep is man-made.

　　T: You are right! Can you explain how they differ?

　　S: The twins were born at the same time, but the Dolly sheep is man-made.

　　T: Anything else? Who want have a try?

　　S: I think the identical dog is man-made.

　　T: Good Job

　　Step II Pre-reading

　　Before class, ask the students to search for some information about this topic. Now show your questions on the screen, and then let them discuss with each other.

　　T: Now please work in pairs and discuss about cloning. Then list the questions you want to find out. Share your list with your partner.

　　Ss: Yes, sir / madam.

　　Questions about cloning:

　　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. Should we clone human?

　　6. Could cloning replace sex as the means of creating new human life?

　　7. Could a parent clone a child who is dying of a terminal illness?

　　After a few minutes.

　　T: Do you have other questions? Volunteer!

　　S: I have! What is the writer’s opinion?

　　T: Good job! I think many of you have questions, now let us read the article with the questions.

　　Suggest answers:

　　1. It is a way of making an exact copy of another animal and plant.

　　2. This happens in plants when gardeners take cuttings from growing plants to make new ones, and when small parts of a plant are taken and gown in a laboratory. It also happens in animals when twins identical in sex and appearance are produced from the same original egg.

　　3. It can help cure disease and can help couples who have no baby to bear a new baby.

　　4. There may be more bad people like Hitler.

　　5. In my opinion, I do not agree, for it may cause many moral problems.

　　6. No. Because cloned human has the same quality as the real human, natural born baby’s quality is higher than his parents.

　　7. No. The cloned baby also has the disease.