您正在看的高中三年级是:Saving The Earth。

　　Teaching focus

　　1. Realize the damage caused to the world and figure out the reasons.

　　2. Find ways to stop the earth from being polluted by discussing in groups.

　　Teaching process

　　Step 1 Revision

　　1. Check note-making

　　Earth: not enough rain, too many cattle, cutting down trees, strong winds

　　Air: smoke from factories, power stations, cars, chemical rain, accidents at power stations and

　　factories

　　Water: waste from factories and cities.

　　Step 2 Presentation

　　1. Look at the earth here on the screen, it used to be very beautiful, with beautiful seawater covering it. It supplies fresh air for human being and other animals. People enjoyed a happy life.

　　But now the earth is being seriously polluted; the trees are being cut down; green hills are becoming less and less. The leaves are falling off the trees. Also, different smokes and fogs are polluting the air. Besides, waste water from factories and plants are dirtying the water, too. Lakes and rivers are no longer safe for fishes, what’s worse, the oceans are being polluted too! As a result people no longer enjoy a happy life as before. The earth is in danger!

　　2. Talk about the map on the textbook.

　　Here is a map on the screen, now I’d like you to read through the text quickly and find the places on this map where the damage has happened.[S1—S5]

　　[The map shows us the polluted areas, which locate in almost every part of the world. Therefore, it is an urgent task for us to save the earth.]

　　Step 3 Fast Reading

　　What else does the text tell us about pollution? Now let’s watch the video and then do some True or False questions:

　　1. Many parts of the world with large population and plenty of crops have become deserts. [T]

　　2. Land may become poor if farmers do not limit the numbers of their cattle. [T]

　　3. Good soil is gradually lost these days as trees are being cut down. [T]

　　4. Air pollution and water pollution are the two causes of the problem that many parts of the world have become deserts. [F]

　　5. Chemicals in the smoke from power stations can travel hundreds of miles in the wind before falling down to the ground in the rain. [F]

　　6. After a bad accident at a nuclear power station, 50% of the trees in Germany were damaged. [F]

　　7. The writer uses the examples of the accidents in both India and Russian to eXPlain how water is polluted. [F]

　　8. Once oceans are polluted, they are not able to clean themselves. [F]

　　Step 4 Careful Reading

　　Next please read the three passages a second time and try to get some detailed information, then you are required to

　　1. to say something about the damage that is caused to the earth by pollution, using the information from the text. Try to present possible ways to help solve the problems.

　　Phenomena Causes Suggestions

　　EARTH The area of desert is growing every year. Cattle eat grass. Limit the number of the cattle.

　　Good soil is gradually lost. Trees being cut down; strong winds blowing the valuable soil away. Plant more trees and try to protect them.

　　AIR Air is being polluted. Factories, power stations and cars produce a lot of waste. A lot of things have to be done to reduce pollution. New laws should be passed and people should realize how serious the problem is.

　　A lot of people died from polluted air in both Russia and India. There were serious accidents that polluted the air.

　　Trees in the forest are destroyed and fish in the lakes are killed. Chemical rain.

　　WATER In some places it’s no longer safe for swimming, nor is it safe to eat the fish. Factories and cities produce a lot of waste. Same as above.

　　Lake Baikal, which used to be cleanest I the world, s now polluted. Waste produced from a chemical factory.

　　2.to summarize the passages to get the main idea of each passage.