高三英语Unit2 Crossing limits 教学设计及教案

Task two: Collect information
T: Work in groups and try to collect enough information for a debate. You had better list as many examples as possible.
Students work together as a team to collect enough information for a debate.
Step V Debate
Task one: Presentation
T: Now the whole class will be divided into two large groups. One is to take the positive stand and the other is to take the negative stand. Those who take the positive stand will be in group A. And those who take negative stand will be in group B. Next you should take the following process to do the debate. Look at the chart below and see what the whole process is.
Process Ⅰ
1. Each group chooses a representative and a sectary to do shorthand.
2. The representative from group A (positive group) presents the entire group’s opinions and reasons.（each student is limited to 1 minute）
3. The representative from group B (negative group) presents the entire group’s opinions and reasons.（each student is limited to 1 minute）
Students do presentation by following the process above.
Task two: Debate
T: Two groups debate with each other by using the examples and facts you have collected just now. But each debater has to be brief and come to the point.
Students debate with each other.
Process Ⅱ (the sectary do shorthand)
1. Debater A states opinion and presents examples or facts.
2. Debater B states opinion and facts to argue with debater A.
Task three: Conclusion
T: In the course of debate each debater did a good job. Now each group is required make a conclusion speech.
Each group chooses a person to make a conclusion speech.
Process Ⅲ
1. The representative from group A makes conclusion speech.
2. The representative from group B makes conclusion speech.
Sample conclusion speech:
Group A:
Science means to explore and research, while on the other hand, only those who are devoted to science can make great achievement in the scientific field. As part of scientific research, exploration is dangerous and it challenges people’s courage, endeavor and spirit to sacrifice. It was the braveness of the early explorers that made people discover “the New World”. But in their course of expeditions, many people lost their lives because of the storms, sickness and lack of fresh water. In space travel human beings are making progress day by day. But if there were no Armstrong, we would not know what the real moon is like. In conclusion, robots can help people do a lot of things, but they can not completely replace human’s courage and wisdom.
Group B:
Robots are ideal alternatives to replace human beings to accomplish the task on the Mars. First, the extreme condition makes it impossible for humans to land on it. Therefore, it is not ripe for human to land on the Mars. Second, lives are always valuable, and we should avoid unnecessary sacrifice since robots are perfect alternatives. We should make full use of it. Third, robots can do better jobs in photographing and data analysis. All in all, it is foolish to cause unnecessary deaths since we can avoid it.
Step Ⅵ Homework
Task one: Preview the following words
curious, wealthy, in exchange for, central position, ambassador, existence, accurate, exist, ripe, command, renew, expedition
Task two: Read the handout and remember as much background information of Reading as possible.

Reference: The other two topics can also be designed to follow the process below.
Language preparation
Discussion
Debate/solution
Design of topic 1:
Topic: Can space explorers of the future take possession of other planets or resources on those planets?
Language preparation:1. Can we use “first come, first served” principle in space exploration?2. Is space exploration very expensive?3. What should we do first if we colonize other planets?4. Will exploration lead to fierce competition among countries?5. Will opening up the planet spoil their natural appearance?6. Is it equal for all the countries on the earth if only a few countries can take possession of the planet just because they are the first to land on it?7. If so, will fierce competition cause wars?Keys:1. It is true, because there is no international law for us to adhere and we have to use natural principle.2. Yes, space exploration research costs a lot. And the first country has to invest large sums of money before they land on the planet.3. They have to spend great effort to open up it and make it possible for human beings to live in it.4. Yes. However, competition among those able countries may lead to greater progress.5. Yes, it surely will.6. No, it is unequal.7. Yes, it will cause wars just as it did when Europeans began their exploration on the sea.
Discussion: …
Conclusion speeches:Sample one: First come, first served. So I believe the first country who has reached the land has the right to take possession of the planet and its resources. For one reason, the first country has to invest large sums of money on the project on the research before they can send human beings to the Mars or other planets. It’s reasonable for the first country to make up for their expense. For another, if space explorers take possession of the land, it will take them great effort to open up and colonize it. If they are not allowed to take possession of the land, they will lack interest in the work. Lastly, if space explorers are encouraged to own the land, this will lead to competitions among countries. Thus space exploration will become prosperous and lead to greater discoveries.Sample two: The earth is ours, so are the planets of outside space. From the ancient time human beings had begun to explore the knowledge about the outside space and now we come to know more and more about space. We can’t make it if it were not for the world people’s joint endeavor. Without the accumulated knowledge from the ancient people of the world, the few developed countries would not make it possible to master the technology to land on the Mars. Therefore, it is the world people’s wisdom that makes today’s achievement. If the first country is allowed to take possession of the land on the Mars, it will not be fair other countries that don’t have the technology to explore space. Therefore, it is not right to take possession of other planets or resources on those planets. Besides, if the “owners” begin to open up these planets, they may destroy the natural beauty of these planets. Also it is possible that fierce competitions among countries may lead to wars as they happened before.

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