Step 1 Lead-in

How much do you know about the two medicines?( as far as you know what can these two medicines be used for?)

Read the article quickly and try to find the answers to

the questions i:

1. When was aspirin first sold as a standardized tablet?

2. What did Fleming, Florey and Chain share?

3.When did people find that drinking a special tea could reduce body pains?

4.When was ASA first made from other chemicals?

Step 2 Detailed Reading

1.Students A read the passage 'Aspirin' only, and try to finish tasks 1,2 & 3 in StepⅡ.

2.Students B read the passage 'Penicillin' only, and try to finish tasks 1,2 & 3 in StepⅢ.

Share your information

1. Check your work with your teammates.

2.Students A help students B finish doing tasks1,2&3

Development of aspirin

1.first trials took place

2.sold in shops as a tablet

3.appeared in the Guinness Book of Records as the

best-selling painkiller

4.proved to be a blood-thinning medicine

5.prevent a stroke

6.reduce the risk of colon cancer

7.reduce blood sugar levels

How aspirin helps people

reduce fever and help stop pains

reduce the risk of heart attacks by thinning blood

prevent a stroke

reduce the risk of colon cancer by 40 per cent

help people with diabetes by reducing blood sugar levels

Step 3 Homework

Writing

青霉素(penicillin)这种药物有很多的功效，但是目前我国的很多医院并没有被广泛的使用。主要原因可能是：1.青霉素比较便宜，不能给医院带来高利润。

2.青霉素难以完全提纯，有很多副作用。

请你就此用英语写一篇150字左右的文章来谈谈自己和观点和看法。

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