人教版选修六Unit - 4 - Global - warming教案(3)

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: And meanwhile it pollutes the environment.

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

The students are asked to read the questions quickly to find out the listening points first. Then listen to the tape twice and give the correct answers.

T: Now please 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 the tape for the first time. Help the students get a general understanding about the dialogue. The students listen and try to finish Exercise 1. Play the tape again, train the students’ ability to spot specific information and understand the implication in the dialogue. The students listen and finish Exercise 2.

Several minutes later.

T：Have you finished the exercises?

Ss: Yes.

T: OK, let’s check your answers. Explain some difficult points if necessary.

T: Now read what Professor Chen and Li Bin say. Work in groups. Discuss who you agree with and give reasons. Use some of the phrases listed in Exercise 2 or any others you know.

Step Ⅳ Homework

1. Review the new words and expressions you learned in this class.

2. Preview Reading. The Second Period Reading Teaching goals 教学目标 1. Target language 目标语言 a. 重点词汇和短语

compare, phenomenon, graph, fuel, trap, data, climate, catastrophe, consequence, range, per, glance, compare to, come about, fierce debate, result in, build up b. 重点句式

There is no doubt that the earth is becoming warmer. P26 Without the‘greenhouse effect’, the earth would be about thirty-three degrees Celsius cooler than it is. P26

They also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide. P26 2. Ability goals 能力目标

Enable the students to talk about the causes and effects of global warming.

3. Learning ability goals 学能目标

Help the students learn how to talk about the causes and effects of global warming and express ideas about what people should do about it.

Teaching important points教学重点

Help the students learn how to debate over the topic “We should do nothing about global warming.” Teaching difficult points 教学难点

Enable the students to learn the writing skills of the text and get a better understanding of articles of this kind. Teaching methods 教学方法 Listening, reading and group work. Teaching aids 教具准备 A recorder and a computer.

Teaching procedures & ways 教学过程与方式 Step ⅠRevision Check the homework.

Review the useful expressions about agreement and disagreement.

Show the students some pictures on the screen. The students have to give names of different energy sources relative to the pictures and deicide which energy sources are renewable and which are not. Then ask the students to tell the effects of using these energy sources. Step Ⅱ Pre-reading

Show a picture of greenhouse on the screen.

T: Now look at the picture. What is it in the picture? S: A greenhouse.

T: Right .Who can tell me what it is used for?

Sa: A greenhouse is made of glass and is used for growing plants, especially during cold weather. T: Yes, you are right. And how does it work?

Sb: The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.

T: Exactly. Thank you. But today we are not going to talk about greenhouse, we’ll talk about greenhouse gases. Have you

heard about this before?

Sc: I know. In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, including carbon dioxide, methane and water vapor.

T: That’s correct. Then what do you think greenhouse gases do? Sd: Let me explain it. They trap heat from the sun and therefore warm the earth.

T: Yes. Last class we talked about the effects of burning fossil fuels. One of the effects is more and more carbon dioxide is being produced, which in turn increases the speed of global warming. Does it matter? What’re your opinions? Next we’ll read an article “THE EARTH IS BECOMING WARMER — BUT DOES IT MATTER?” Step Ⅲ While-reading

Get the students to read the passage fast and meanwhile help the students form a good habit of reading.

T: What do you think will be talked about at the sight of the title “THE EARTH IS BECOMING WARMER — BUT DOES IT MATTER?” Now please skim the passage to obtain a general idea of the whole passage. While reading, pay attention to the writing skills and if possible, divide the whole passage into several parts and summarize the main idea for each part.

百度搜索“77cn”或“免费范文网”即可找到本站免费阅读全部范文。收藏本站方便下次阅读，免费范文网，提供经典小说综合文库人教版选修六Unit - 4 - Global - warming教案(3)在线全文阅读。