Unit 9 Saving the earthPeriod 1Teaching Aims：1. Train the students’ listening ability．2. Improve the studens’speaking ability by talking about nature ecology and the environment．3. Learn and master some useful expressions for supporting an opinion．4. Help the students to know something about the pollution．Teaching Important Points：1．Improve the students’speaking ability．2．Improve the students’listening ability．3．Help the students to learn to support an opinion．Teaching Difficult Points：1．How to improve the students’speaking and listening abilities．Teaching Methods1．Listening-and-answering activity to help the students go through the listening material．2．Discussion to make the students practice supporting an opinion．3．Individual，pair or group work to make every student work in class．Teaching Aids：1．a tape recorder2．the blackboardTeaching Procedures：Step I GreetingsGreet the whole class as usual．Step II Warming up (Show some beautiful pictures to the students.)T: Look at these pictures. How beautiful they are! Do you want to pay a visit to these places?Ss：Yes．T：But in some places，it’s not so beautiful Look at the pictures．please． (Show the following pictures .)T：What can you see in the pictures?S：1 can see a river，which is polluted．The river water is very dirty．S：I can see smoke coming from many chimneys，and the air is dark．The air is polluted．T：Good．Which problem do you think is the biggest one facing the earth?S：I think it is the water pollution．T：Why do you think so?S：Because if water is polluted．People will not be able to get clean water to drink；therefore，many people will get sick．It’s terrible．T：Very good．Who has a different opinion?S：I think the air pollution is the ...
