人教版选修六Unit - 4 - Global - warming教案(7)

b. 重点句式 P63

I’m sorry to bring this up, but... I’m sorry to have to say this, but... They shouldn’t have done it. They are to blame.

Why don’t you do something about it? Perhaps they should / ought to do... 2. Ability goals 能力目标

Enable the students to talk about some environmental problems and Clean Up Day. 3. Learning ability goals 学能目标

Help the students learn how to express their own ideas about some environmental problems. Teaching important points 教学重点

Enable the students to talk about some environmental problems.

Teaching difficult points 教学难点

Enable the students to talk about some environmental problems.

Teaching methods 教学方法 Listening, speaking and group work. Teaching aids 教具准备

A recorder, a computer and a projector. Teaching procedures & ways 教学过程与方式 Step Ⅰ Revision

Check the homework to see whether the students have mastered the use of “it” for emphasis.

T: Last class we learned about “it” used for emphasis. Do you remember the structure?

Ss: Yes. The structure is: It is (was) ... + that (who) + ...

T: Now, who would like to read the sentences you have written as homework. Sample sentences:

It was James who broke the window.

It was the little ants that destroyed the whole building. It is her grandma who brings her up all these years. It was the hope in his heart that enabled him to escape from the prison. Step Ⅱ Listening

Get the students to prepare for the listening by asking some questions.

T: In this unit we have talked much about global warming, which obviously causes great concern all over the world. Many organizations have been set up to protect the environment,

one of which is Millennium Kids. Have you ever heard about it? Ss: No.

T: Would you like to know something about it? Ss: Yes.

T: OK. We’ll listen to a dialogue about it. Please open your workbooks and turn to page 62. Please read the instructions and questions fast to find out the listening points first. Pay much attention to the key points while listening.

Play the tape for the first time. Help the students get a general understanding about the dialogue. The students listen and try to answer questions in Exercise 2. Play the tape again, train the students’ ability to pick out specific information. The students listen and fill in the information sheet in Exercise 3. Play the tape for a third time and let the students check their answers by themselves.

T: Have you finished the questions? Ss: Yes.

T: OK, let’s check the answers together. Explain some difficult points if necessary. Step Ⅲ Talking

T: From what we’ve just listened to, we can see global warming is only one of the environmental problems. There are many

other problems. Can you give me some examples? Sa: Air pollution and water pollution. Sb: Deforestation. Sc: ...

T: You are right. Many environmental problems endanger the world we are living in.

The teacher may as well collect some pictures about environmental problems and show them to the students through a computer. One of the pictures should be about plastic bags.

T: What can you see in the picture?

Ss: We can see lots of plastic bags and a beach seriously polluted by plastic bags.

T: What do you think plastic bags do to the environment? Sd: I think they pollute the environment and they are a big environmental problem. T: Do you agree with him?

Se: Yes. I don’t like using plastic bags because they are bad for our health. I also heard that plastic bags can not be reused and therefore it is a great waste to use them.

T: It’s true that plastic bags do great harm to the environment. It’s time that we did something about this big environmental problem. Now work in small groups, discuss the questions in TALKING on page 63. The expressions below the questions may help you.

Ask some groups to show their work. A sample discussion:

Sa: Plastic bags can be seen everywhere. Some people always leave litter everywhere including plastic bags.

Sb: Yes. They shouldn’t have done it. Sometimes we even find plastic bags hanging on trees. They spoil the beauty of the cities.

Sc: Apart from the facts that you mentioned, plastic bags are doing great harm to the environment.

Sa: What do you mean? Is it a very big environmental problem? Sc: Yes.

Sb: Can you explain why?

Sc: First, plastic bags are made from non-renewable resources. Sa: Does it mean those resources are lost to us if they are not recycled?

Sc: Exactly. Second, plastic bags pollute the soil because they can hardly break down.

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