人教版选修六Unit - 4 - Global - warming教案(8)

Sb: It sounds terrible!

Sc: The bad effects are more than that. Plastic bags kill seabirds, sea mammals and countless fish each year world wide. Sb: But how does this come about?

Sc: Plastic bags float easily in air and water and travel long distances. What’s worse, when the animals die and break down, the plastic bag can become free again to kill another animal. Sa: It’s time for people to do something about this problem. Sb: Yes. But how? We have to face the fact that 2 billion plastic bags are used every day in China. It’s impossible to stop it in one day!

Sc: Yes. But people can use fewer and reuse them.

Sa: So let’s do it right now. And we should let more and more people know it.

Sb: Right. Hope everyone can do something to it. Together, individuals can make a big difference. Step Ⅳ Listening task and Speaking task

T: Though there are many serious environmental problems, fortunately most countries realize these problems and they are taking steps to save the earth. Clean Up Australia Day is a good example. Next we’ll listen to Tom’s talk about it.

Play the tape for the first time. Help the students get a general

understanding about the talk. Play the tape again, let the students pay attention to the dates Tom mentioned and what happened on these dates. While listening, ask the students to make some notes in the table on page 65. Play the tape for the third time, let them have a check.

T: OK, let’s check the answers to Exercise 1. Explain some difficult points if necessary.

Ask the students to read the top 9 rubbish litter Tom mentioned in his talk and let them talk about litter at their school or communities. ...

T: Like Australia, China also has a Clean Up Day. Do you know something about it? Ss: No.

T: OK. It doesn’t matter. After class, collect some information about Clean Up China Day. You are asked to plan a talk about it. Work in groups of three, follow the steps in the bottom on page 65 to prepare the talk. That is your homework for today. Step Ⅴ Homework

Prepare a talk about Clean Up China Day. The Sixth Period Writing Teaching goals 教学目标

1. Target language 目标语言 a. 重点词汇和短语

litter, butt, pollute, endanger, solution, add up to, break down b. 重点句式 P66

Apart from the fact that butts spoil the beauty of the environment, they contain some very toxic chemicals. It is up to people not to let plastic bags become litter. The earth would be a better place because it would be less polluted.

2. Ability goals 能力目标

Enable the students to write an essay on one of the environmental problems. 3. Learning ability goals 学能目标

Enable the students to learn how to write an essay. Teaching important points 教学重点 The structure of an essay. Teaching difficult points 教学难点

Enable the students to learn how to support their points of view.

Teaching methods 教学方法 Task-based method. Teaching aids 教具准备

A computer and a projector.

Teaching procedures & ways 教学过程与方式 Step Ⅰ Revision and Lead-in

Check the homework. Ask two groups to present their talk to the class.

T: In the last period, we talked about plastic bags. What do you think of plastic bags?

S: Plastic bags are widely used all over our country. Many people use them to carry food or other things. But I think they are annoying and they seriously pollute our environment. T: You are right. Plastic bags are also known as white pollution. They endanger our environment and people’s health. Now, let’s read an article and find how they endanger the environment. I hope after reading the article, all of you can realize the harm of using plastic bags and use fewer of them. Step ⅡReading

T: Open your workbooks and turn to page 66. Read Tom’s essay about litter. Make a summary for each paragraph, and then fill in the table on page 67. You don’t have to write down complete sentences, notes will be OK. Pay attention to the writing skills while reading. Sample answers:

Paragraph 1 Point of view Two of the most common and dangerous litter: cigarette butts and plastic bags. Paragraph 2 First point of Cigarette butts are small but the argument; bad for the environment: over Evidence 1,600 billion cigarettes are smoked each year and large quantities of butts are thrown away; Butts contain toxic chemicals; Decrease the quality of water; Endanger plants and animals Paragraph 3 Second point of the argument; Evidence Plastic bags litter is a danger to the environment: Waste of non-renewable resources; Last from 20 to 1,000 years in the environment; Kill up to one million seabirds, 100,000 sea mammals and countless fish every year Paragraph 4 Point of view The best solution would be not to smoke or use plastic bags at

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