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3、通过小组合作交流，能正确地理解并能用标准的语音语调朗读文本，在教师的引导和帮助下尝试复述课文内容。
教学难点：
1、能听懂、会读、会说单词protect, earth, save, useful, waste, reuse, energy, most, much,coal, wood, plastic, oil, drive, other，glass及词组come from, cut down,too many,,too much,
2、能听懂、会读、会说句子We use … to … We should … We shouldn’t …
3、通过小组合作交流，能正确地理解并能用标准的语音语调朗读文本，在教师的引导和帮助下尝试复述课文内容。
教学过程：
Step 1 Pre-reading
T: Good morning, boys and girls.
Ss: Good morning, Miss Yang.
T: I’m very happy to be your teacher today. I hope we can enjoy this lesson. OK?
Ss: OK.
T:Now let’s watch a video.(视频里是当今各种环境污染问题)
T: Look, 让学生说说从录像里看到了些什么，然后老师可以引导学生理解课题，the Earth is not as beautiful as before. So we must protect the earth.(揭题)
So today we’ll talk about how to protect the Earth.(揭题) Let’s be the green guards to protect the Earth. OK?
Ss: OK.
T: How can we become green guards? Look, here are some steps.
课件展示成为环保小卫士的步骤：
We know the use of water, energy, trees and plastic.（我们能了解水，能源和树的作用）
We know the problems of them（我们能了解他们出了什么问题）
We know the solutions of the problems（我们能知道怎样解决）
We can talk about protecting the Earth（我们能用英语谈论关于如何保护地球）
T: OK. Let’s go to step one.
Step 2 While-reading
Watch and answer.
T：Boys and girls, can you give titles to the pictures?Let’s watch a cartoon and answer.
S1:Save water.
S2:Save energy
S3:Save trees
S4:Don’t use too much plastic
T:Good! Now can we find out the use of the four things?(连线)