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2. New structures: Goods from the Earth are hard to find.
Here is a guide to living on Mars in the future.
III. Focus of the lesson and predicted area of difficulty
Make a spidergram and write a guide to living on another planet.
IV. Teaching procedures
Step 1 Lead-in
1. Revision
T: Daniel wants to know something about living on Mars. Can you tell him the differences between our Earth and Mars?
S: There isn’t enough water or oxygen on Mars. There is less gravity. However, there is more space for people.
2. Brainstorming
T: Daniel wants to know what life could be like on Mars. Let’s have a discussion and help him know more about it.
If there isn’t enough water or oxygen on Mars, what would life be like?
S: Plants wouldn’t grow.
People would have to eat dried food.
Food would be in the form of pills and would not be so tasty.
Oxygen would be provided everywhere.
T: If there is less gravity, what would life be like?
S: People would have to wear special boots to prevent them from floating off into space.
They would need sleeping bags to keep them in place while sleeping.
Everything would float in the air.
T: If there is more space, what would life be like?
S: Humans would live in houses with huge comfortable rooms.
Traffic would not be so heavy.
Humans would have more time and places to relax themselves.
【设计意图：由回答三个问题引入本课，学生通过积极的思考与讨论，既复习了之前所学的内容，也为下一个教学过程的进行做好了铺垫。】
Step 2 Learn about the spidergram
1. Learn to organize ideas
T: Before visiting a new place, we should get as much information as possible. Most of the visitors are interested in four keywords most, clothing, food, housing and transport. We have just talked about what life would be like on Mars. Can you separate these ideas into different groups?
S:
ClothingFoodHousingTransportPeople would have to wear special boots to prevent them from floating off into space.