Reading and vocabulary教学内容

Module 6 Book 5

Cloning and DNA Vocabulary and reading Teaching goals

1. Target language

Useful expressions A. The definition of DNA and a clone The structure of the acid DNA --- a transparent twisting ladder made of the fundamental components of life

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A clone is an organism which is genetically identical to another one. But it’s now certain that no clone is an exact copy because of differences in experiences and upbringing. B. The disadvantages of cloning 

A clone may be under unknown psychological pressure throughout their childhood 

A clone may possess new vices instead of existing virtues 

A waste of embryo can not be acceptable 

Relying on a few cloned animals or crops would restrict the biodiversity of the breed C. The advantages of cloning 

Cloning can be a treatment to the people who have no children 

Cloning can help reproduce the talents of exceptional human beings 

Cloning can help someone recover from a disease. 

Cloning can help farmers with prize cows or crops •

2. Ability goals

Enable the students to learn about the cloning technology and form their own opinions about whether we should take advantage of cloning or not. 3. Learning ability goals

Help the students with some vocabulary about cloning and know what it is as well as the relation between cloning and DNA Teaching difficult points

1. Some difficult words about cloning and DNA 2. Make good use of information about disadvantages and advantages of cloning to express their own ideas on the cloning technology Teaching methods

Reading , writing and presenting. Teaching aids

Electronic whiteboard Teaching procedures & ways

Step 1:

Work in pairs

Read the title of the passage and the words about cloning and DNA in exercise one

to predict what the students themselves will know about the technology. Step 2: Scanning

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Make sure the definition of cloning and DNA as well as the relation between them 

Finish exercise 4, finding the main idea of each paragraph Step 3 ：Intensive reading

Divide the passage into three parts and read them one by one, focusing on the advantages and disadvantages of cloning Step 4: Discussion

Summarize the pros and cons of cloning

Step 5: Writing task

A heated discussion about whether to clone or not was carried out recently. Students express the results of the discussion and represent their own opinions. Step 6: Peer-evaluation

Finish peer-evaluation in a group of four and make comments on others’ work in order to learn from each other as well as accumulate useful expressions