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Step One:Leading-in
1.展示有关鲨鱼的各种图片，谈谈你对鲨鱼有什么了解。
2.展示鲨鱼被割鱼鳍的动画，让学生明白什么是割鳍。
Step Two：Preparation
1.播放保护鲨鱼的宣传片，让学生明白为什么要保护鲨鱼，并引出本单元的话题：Save the sharks！
2.用海洋生态系统中的食物链图示来表明鲨鱼存在的重要性。
Step Three：Presentation
Pre-reading:Read the passage and answer the question :
What does the passage tell us to do?
While-reading: Read the passage and answer the questions
1.Where shark fin soup is popular?
2.Number of sharks caught and traded every year.
3.How governments can help?
4.Two environmental groups against”finning”
5.The number of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
According to the article ,can you find the reasons?
After-reading:
让学生再读课文，根据课文内容填空
Some people like to eat shark's fin soup, especially in s________ China. But getting the shark's fin is very c_____. When people catch sharks, they c____ o____ their fins and throw the sharks into the ocean. The shark slowly dies because it can't s_____ without the fin. And it is also h _______ to environment. Sharks are at the t____ of the food chain. If the number of sharks drops too low, it will b______ the balance of nature. Please say no to eating the shark fin soup, and take a_______ to save the sharks!
Step Four:Practice
1.Part 3b
1.Many people do not realize they are killing a whole shark_____ they enjoy a bowl of shark fin soup.
2.Sharks are at the top of the food chain,____ if their numbers drop,the ocean’s ecosystem will be in danger.
3.Many think that sharks are too strong to be endangered,______ they are wrong.
4._________ there are no scientific studies to support this ,a lot of people believe that shark fins are good for health.
5.Sharks may disappear one day ____ we do not do something to stop the sale of shark fins.
2.Exercise:
1. 根据句意及首字母提示完成单词
1.They killed many sharks last year.How c______ they are!
2.Learning s______ knowledge is very useful.