Using LanguageⅡPPT配套教学设计内容

unit 2 cloning 一．Aims:

Teaching aims

1. Target language

archaeology, tentative, accuracy, excavate, interrupt, ornament, assume, regardless, sharpen, cut up, scrape, ample, primitive, preserve, bead, botany, botanical, analysis, specific, seashell, specifically

2. Ability aims

Enable the Ss to know the reason why the dinosaurs can’t clone. Content:

Step I

Revision

Check the homework.

The Ss will how their information about the dinosaurs in the following steps. Step II

Lead in

1. Ask the Ss to review the words and the useful expressions in this unit. 2. Ask Ss to discuss how the cloning developed. 3. Please enjoy some pictures about dinosaurs.

Step III Reading

1. Play the tape once, and then choose the correct answers to the below question:

1. The writer of the text_____

A. is excited by the possibility of cloning fierce and extinct animals

B. believes that extinct animals can be brought back to life by cloning C. thinks it impossible or unsuitable to clone extinct animals like dinosaurs

D. dreams of dinosaurs returning to the earth 2. Skimming 1). The film Jurassic Park is popular because_____.

A. people are interested in the subject of cloning

B. all the actors are dinosaurs C. it was directed by a scientist who clones dinosaurs D. it proves very interesting 2). 3.Which of the following is true?____ A. Mice were cloned in 1981. B. Dolly the sheep was the first cloned animal. C. The name of the cloned cow is “Bison”

D. China was successful in cloning mammals. 3).The reasons why a group of cloned animals all die of the same illness do NOT include____.

A. they have the same arrangement of genes

B. there isn’t enough diversity in the group for it to overcome illnesses C. the illness is a new one D. their arrangement of genes can not resist that new disease 3. Scanning :Read the passage again and answer the questions.

Why shouldn't you clone an extinct animal unless there is enough diversity in the group? 4. Careful reading

1.) Why is it wrong to clone an extinct animal if it would have to live in a zoo? 2). Why can't you clone the DNA of animals that have been extinct longer than 10,000 years?

Step IV Post-reading

Now in pairs discuss which extinct animals described below are worth restoring by means of cloning. Choose one and use the information to help you argue why this animal should be restored to the earth.

Step V Homework

Find out some language points from the passage.