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Step 1 Warm up.
1. Greetings.
2. T: Please look at these two photos. They are photos of me. Twenty years ago, I was short and thin. My hair was short. I couldn’t speak English. I wanted to be a teacher. I am 33 years old now. I’m tall, my hair is long. I’m a teacher. I can teach English well.
3. T: These years I change a lot, and my family also change a lot. Let’s read and complete the dairy.
Twenty years ago, my mother used a_________ at home to call her friends. Now she has a _____________. My father listened to the ________ and read ___________ to get the news. But now he usually surfs the Internet and watches the news on it and he also reads ________.
As for me, ten years ago, I wrote _______to my friends, now I write __________and send( 发送 ) _________ to them. It’s faster.
T: Great inventions change our life.
Look, what’s this? An old plane?
An old plane now? OK. It’s a new plane.
A plane? No, it’s a train.
A new train? No, it’s a telephone.
A telephone? No, it’s a mobile phone.
Today we’ll talk about ‘Unit 4 Then and now.’（揭题，贴板书）
Teach Culture time.
4. Look, what's this? It’s an aeroplane.
What about this? It’s a train.
Who invented the aeroplane and the train?
Read: invented Please read it by yourself.
5. T: (屏显中国人乘风筝上天图片)Was that an aeroplane?
S: No.
T: It wasn’t a plane because it didn’t have any engines.（引擎，发动机）
S: The Americans invented the aeroplane and the British invented the train. Do you want to know the names of the inventors?
Wright Brothers invented the first plane. Do you want to know more about the first plane? Let’s take a look.
6. I think you know more about the first plane. What about the first train? After class, you can surf the Internet and try to know more about the first train. The Americans and the British invented the first plane and the train. And the Chinese people are even great. Look, here are the four great inventions of ancient China. (展示)
Try to read:
S: Papermaking, Printing, Gunpowder, Compass.
7. What other inventions do you know? Now share in groups. Let’s share together. (I see you know a lot. But you should stop for the time being. I think you can share in groups after class. )
S: …
Look at the other inventions. Which one do you know?
Look at the inventions here. Beyer invented the telephone.