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The Fifth Period Listening and Speaking Teaching goals 教学目标 1. Target language 目标语言 a. 重点词汇和短语
tropical rainforest, cut down, destruction, slow down 2. Ability goals 能力目标
Learn the present situation of tropical rainforests in the world.
Talk about what they can do to help slow down the destruction of rainforests in China.
3. Learning ability goals 学能目标
By listening to the interview, learn and talk about the present situation of tropical rainforests and find ways to help slow down the destruction of them. Teaching important and difficult points 教学重难点
Learn reasons why rainforests are being destroyed and consequences of rainforests being destroyed.
Teaching methods 教学方法 Listening, brainstorming and speaking. Teaching aids 教具准备
Projector, slide and some pictures of tropical rainforest. Teaching procedures && ways 教学过程与方式 Step Ⅰ Revision and lead-in
Check the homework. Ask several groups to report the result of their discussions. T: In the last period, we learned co-evolution and the relationship between several plants and their pollinators. What do you think would happen to the animal pollinators of each plants described if these plants dies out? Now I’d like some groups to report your ideas.
Group 1: We think that if these plants died out, their pollinators would die out too, because they have become totally dependent on each other. It would be hard for the pollinators to adapt to other plants and get their food. Since they had no food sources, they would probably die out.
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Group 2: We have quite different opinion. We think the animal pollinators would try to find other plants that they could get food from. Maybe at first, they couldn’t get used to the taste of the new food, but gradually, they would. Just like us humans, when you travel or live in another country, you may find it hard to get interested in the local food, but in order to survive, you have to. Maybe when you leave that country, you find yourself quite attracted by the food.
T: Good points. I think both your opinions are reasonable. I suggest you do some research on this topic after class if you are interested in it. Today, we will talk about tropical rainforest. (write “Tropical rainforest” on the Bb) What comes into your mind when you hear the words? Can anyone describe it?
S: I think tropical rainforest is the forest that locates in the tropical areas where it rains a lot.
S: I think in the tropical rainforest, there should be many big and tall trees, thick bushes, various kinds of wild animals and so on.
T: Good descriptions! Rainforests cover less than two percent of the Earth’s surface, yet they are home to some 50 to 70 percent of all life forms on our planet. The rain forests are quite simply, the richest, oldest, most productive and most complex ecosystems on Earth. Tropical rainforests are called “jewel of the Earth” or “the Earth’s lungs”. Now I will show you some pictures of tropical rainforests. Look at the screen.
Show some pictures of tropical rainforest.
Step Ⅱ Pre-listening
Show some pictures to the students.
T: What do you think of them? Aren’t they beautiful? But nowadays, the world’s rain
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forests are being destroyed at an alarming rate. Look at some statistics: Show the following to students. Global Rates of Destruction
☆ 2.47 acres (1 hectare) per second: equivalent to two U.S. football fields. ☆ 150 acres (60 hectares) per minute
☆ 214,000 acres (86,000 hectares) per day: an area larger than New York City. ☆ 78 million acres (31 million hectares) per year: an area larger than the country of Poland. In Brazil
☆ 5.4 million acres per year (estimate averaged for period 1979-1990)
☆ 6-9 million indigenous people inhabited the Brazilian rain forest in 1500. In 1992, less than 200,000 remain. Species Extinction
☆ Distinguished scientists estimate an average of 137 species of life forms are driven into.
☆ extinction every day, or 50,000 each year.
T: Turn to Page 75. Look at the two pictures. The one on the left is a tropical rainforest that is well protected and the one on the right is a tropical rainforest that has been cut down. How would you describe the picture on the right?
S: We can’t see any trees in the picture. They have been cut down. Some wild animals are searching for food everywhere. They are so poor because they have lost their home.
T: Now work in groups and answer the three questions above the pictures. Suggested answers to the questions:
1. We would find tropical rainforests in the countries or areas near the equator, where it is very hot and wet.
2. People cut down the rainforests for lumber, farm animals and agriculture. 3. They are important because they provide food and habitat for wild animals and they protect the environment for us humans.
T: The destruction of tropical rainforests is a very serious problem in some countries
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