【連載】英語(yǔ)：人教版-高中選修6-Unit 4 Global warming 教學(xué)設(shè)計(jì) 教案

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教學(xué)準(zhǔn)備

教學(xué)目標(biāo)

Teaching goals 教學(xué)目標(biāo)
1. Target language 目標(biāo)語(yǔ)言
a. 重點(diǎn)詞匯和短語(yǔ)
energy, light (v.), heat (v.), renewable, non-renewable, fuel, blame, run out
b. 交際用語(yǔ)
Expressing agreement and disagreement
Yes, I agree with you.
Yes, I think so.
I believe that you’ve got it right.
I don’t think so.
I don’t think that’s right.
I’m afraid you are wrong.

2. Ability goals 能力目標(biāo)
Enable the students to talk about different sources of energy and express their own ideas.
3. Learning ability goals 學(xué)能目標(biāo)
Help the students learn how to give their ideas about the use of energy.

教學(xué)重難點(diǎn)

Teaching important points 教學(xué)重點(diǎn)
Enable the students to express agreement and disagreement.
Teaching difficult points 教學(xué)難點(diǎn)
Enable the students to learn how to express agreement and disagreement.

教學(xué)過(guò)程

Step ⅠRevision

T: Good morning, everyone.

Ss: Good morning, teacher.

T: Sit down, please. Before class, I’ll check your homework first. Mary, would you read your homework to us?

Check the students’ homework and have a discussion with the students about the mistakes Mary made. Let the students have a clear understanding about the mistakes and then correct them.

Step ⅡWarming up

T: As we all know, we depen d on energy to do many things in our daily life. Some people even say we could do nothing without energy. Can you tell me what we use energy for?

Sa: Energy lights our cities.

Sb: Energy heats our buildings.

Sc: Energy entertains us. With the help of electricity, people have got a lot of fun from watching TV, playing computers and so on.

Sd: There are many other electrical appliances that make our life more convenient and comfortable such as washing machines, microwaves, air conditioners and so on.

Se: Today energy also helps people realize many so-called dreams in the past. For example, people can “fly” from one place to another by plane which runs on energy.

Sf: It’s true. In fact, not only planes but also cars, ships and trains run on energy.

T: Well done. All that you’ve just said is right. So it seems that energy plays a very important role in the modern world. Then where does all the energy come from? Open your books and turn to page 25. Look at the pictures on this page. They may help you find out the answers.

After a while.

T: Who’d like to tell us your answers?

Sg: Wind power.

Sh: Coal power.

T: Right. Is there any difference between them?

Si: Yes. Wind will never run out while coal is a limited source.

T: It’s true. As we know, an energy source is renewable when supplies of it never run out while some supplies， such as coal, will definitely run out one day. Energy of this kind is called non-renewable sources. Please think of as many sources as you can and decide which energy sources on your list are renewable and which are non-renewable.

If necessary, give some words related to the pictures which might be difficult for the students such as oil refinery, hydroelectric power and so on.

The teacher should also collect as much information about different sources of energy as possible and show it to the students in class through a computer. In this way, the students will become more interested in this topic and their knowledge on this aspect will be enlarged.

Sample answers:

Step Ⅲ Listening and Discussing

T: Fromwhat we’ve just talked about, it is clear that energy does a lot of good to us.But every coin has two sides. Is there any negative effect of using energy?

Sa: Yes.People use too much energy which is resulting in an increase in carbon dioxide.That is how the global warming comes about.

Sb: Andmeanwhile it pollutes the environment.

T: It’strue. Many people have realized the problem. Next we’ll do some listeningpractice on this topic. Let’s see what other people think of this issue.

Thestudents are asked to read the questions quickly to find out the listeningpoints first. Then listen to the tape twice and give the correct answers.

T: Nowplease turn to page 31. Let’s do listening. Before you listen to the tape,please read fast the statements in Exercise 1 to find out the listening points.Pay much attention to the key points while listening.

Play thetape for the first time. Help the students get a general understanding aboutthe dialogue. The students listen and try to finish Exercise 1. Play the tapeagain, train the students’ ability to spot specific information and understandthe implication in the dialogue. The students listen and finish Exercise 2.

Severalminutes later.

T：Have you finished the exercises?

Ss: Yes.

T: OK,let’s check your answers.

Explainsome difficult points if necessary.

T: Nowread what Professor Chen and Li Bin say. Work in groups. Discuss who you agreewith and give reasons. Use some of the phrases listed in Exercise 2 or anyothers you know.