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1)T: Good morning, boys and girls.
Ss: Good morning, Miss Wu.
T: I hope we can enjoy this lesson. OK?
Ss: OK.
2)Let’s play a game :Guessing game: What?
2.??Think and say
T: Everyone has a home, it’s small but nice. But all of us have a big home, What is it?
Ss: It’s the earth.
Teach: earth read: the earth
Enjoy some pictures about the earth.
T: But the earth is sad now. Why?
S: Because the earth is dirty…
T: We should protect the Earth, right?
Ss: Yes.
T: So today we’re going to learn Unit 7 Protect the Earth.
(揭题，带领学生读课题)
Step2: While-reading
1. Skim and find
T: But how to project the earth? Look at the pictures. Can you talk about the pictures? People are doing bad things to the Earth. Can you give titles to the pictures? Skim the text and find the title. Here’s a tip for you: How to read the new words?
T: You did a good job. But why should we do these?
First let’s go to Part 1.
2. Save water
1) Read and Underline.
T: Why should we save water? Here are two reasons. Please read it and underline the key sentences.
Reason 1: Because water is useful.
T: Why is water useful?
S: We use water to do many things. 板书：We use… to…
T: Read it. We use water to clean clothes. What else can we use water to do?（生自由发挥）
Look at the pictures, say together.
Reason 2: In many places, there is not much water. Read it.