2. (再读1a，完成1c。)

T: Read 1a again and write down the importance of rainforests.

　 (核对答案。)

　 T: Ss, can you give us your answer?

　 S₁: Make the air fresher.

S₂: Control the weather.

S₃: Give us wood, rubber, fruit, medicine and so on.

2. (听课文1a，了解课文内容并回答问题。)

T: Most students want to know more about the rainforests. Please listen to the tape and answer the following questions.

(出示小黑板。)

(核对答案。)

Step 3　 Consolidation 第三步　 巩固(时间:10分钟)

1. (看热带雨林的图片，学习生词。引出比较级+and+比较级的用法。画线的单词为生词。)

　 (教师通过多媒体出示热带雨林的图片，教师和学生一起观看图片，同时教师讲解图片上的信息。)

T: It’s a picture of forests, rainforests. They cover 6% of the earth’s surface. Thousands and thousands of animals live in it. It’s always dark, hot and wet in the rainforests. They can help to control the climate. They give us wood, rubber, fruit, medicine and so on. They are very important to us, but they are becoming smaller and smaller, so we must protect them well.

(第二遍教师边说边板书。学习生词，帮助学生理解掌握smaller and smaller的用法。)

(学生熟读单词后，再看图片并回答教师提出的问题。)

T:　 What are they?

Ss: They are rainforests.

T:　 How large are the rainforests?

Ss: They cover 6% of the earth’s surface.

T:　 What’s in the rainforests?

Ss: Thousands and thousands of animals live there.

T:　 What can we get from the rainforests?

S:　 We can get wood, fruit, medicine and rubber.

T:　 Are they important to us?

S:　 Yes, they are.

T: What should we do with them?

S: We should protect them well.

T: Do you want to know more about rainforests?

Ss:Yes.

T:　 Let’s learn Section C together.

2. (头脑风暴，引出新知识。)

T: Now, please say some animals and plants as many as you can.

Ss: …

T:　 Where can you see animals and plants?

S₁: At home.

S₂: In the zoo.

S₃: In the forest.

T:　　　 Very good. In a forest, there are many animals and plants. Today we’re going to learn a special forest. It often rains and it is very wet. It is in the tropical area. Can ou say what’s it?

(引出rainforest 并板书。)

Step 2　 Presentation 第二步 　呈现(时间:12分钟)

Step 1　 Review 第一步　 复习(时间:8分钟)

1. (师生互动示范，然后让学生表演对话，复习描述动物和植物。)

T: Hello, S₁! Do you like plants or animals?

S₁: I like animals better.

T: Why do you think so?

S₁: Because animals are our friends. They give us joy. They are very friendly to us.

T: Well done! S₂! Do you like plants or animals?

S₂: I like plants better.

T: Why do you think so?

S₂: Because plants are very important to us. They are useful.

T: Now, class, please practice the dialog like this, OK?

(学生两人一组练习对话。然后找几组学生表演。)

录音机/多媒体/小黑板

3.Describe nature resources and realize the importance of environment protection:

(1)They also help to control the climate.

(2)The rainforests give us wood, rubber, fruit, medicine and so on.

(3)It is important to all living things. We must save every drop of water.

2.Go on learning comparative and superlative degrees of adjectives:

(1)The plants in the forests help to make the air fresher.

(2)But now rainforests are becoming smaller and smaller.

(3)Water makes up the largest part of the human body.

1.(1) Learn some words about rainforests:

cover, earth, surface, dark, forest, control, wood, rubber, protect

　　 (2) Learn some other words and expressions:

　　　 everything, fact, in fact, make up, lake, sea, ocean, drop, fill, fill … with …

　 (3) Learn some useful expressions:

thousands and thousands of　 　　　 be very important to

be necessary for…　　 　　　　　 can’t live without…

save every drop of water