S2: It was mainly made of bamboo.

T: was it easy for people to make paper then?

S1: No, it was very difficult then.

T: What is paper made of now?

S3: It's mainly made of wood, bamboo, and cotton.

...

Ⅱ. Presentation

1. Present the sentence structure, using the pictures on the big screen:

-What's the golden medal made of?

-It's made of gold.

-Is this table made of wood?

-No, it isn't. It's made of glass.

-Is Butter made from meat?

-No. It's made from cream?

让学生们学习掌握be made of/from句型的用法，及be made of与be made from的区别。

两词组都是"由......制成的"之意。be made of 指从原料到制成品只发生了形状变化，没有发生本质变化（属物理变化）

be made from指从原料到制成品发生了质的变化，已无法复原（属化学变化）。

Ⅲ. Learning

1. Show some pictures on the big screen. Try to learn the new words using "be made of" structure.

Learn the new words: chopsticks, coin, fork, blouse, silver, glass, cotton, steel