Small inventions that changed the world.

1. What kind of invention does Roy think of?

The zipper.

2. Why does Roy think it is a great invention?

Because it is often used in our daily lives.

3. Who and when was the zipper invented?

Whitcomb Judson in 1893.

5. When did the zipper become popular?

　　　 Around 1917.

Language points.

Read in groups

Step6. Role play the conversation.

Step7. Consolidation

Fill in the banks.

Paul: Hey Roy, the subject for my school________ is "Small ________that changed the world." Can you help me _______an invention?

Roy: My________! Let me think ... hmm ... I know! the______!

Paul: The zipper? Is it really such a great invention?

Roy: Think about how often it's used in our _____lives. You can see zippers on dresses, trousers, shoes, bags ... almost everywhere!

Paul: Well, you ___ seem to ___________...