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: