Unit 13 Were trying to save the earth!Section A 3a-3c Teaching by: Zhou Zhenghong 一、教学目标：1. 语言知识目标基本词汇： bin, shark, fin, method, cruel. Harmful, chain, ecosystem, industry, law, scientific, 基本词组：be harmful to, at the top(of sth.), take part in, turn off, take action, throw away, put sth. to good use, pull down, bring back基本句型：No scientific studies have showed that shark fins are good for health. We should help save the sharks. 2. 技能目标: 能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。3. 情感目标: 有环境危机意识，学会关注环境保护环境。二、教学重难点： 1. 教学重点：（1）能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。 （2）保护环境的措施方法。教学难点：能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。三、教学步骤:I. Revision Role-play 2d.II. Lead in (1) Teacher tells students the earth is badly polluted. What should we do to save the earth? Lets take action. For example: Turn off the lights when you leave a room; Take buses instead of driving cars Recycle books and paper.(2) Some animals are endangered. We should do something to protect the animals and the environment! III. Listen and answer Whats the passage about? IV. Reading1.Sharks are endangered, read the passage and judge the sentences.Sharks fin soup is famous and expensive all around the world.We have to kill a whole shark to get a bowl of sharks fin soup.People cut off sharks fins and throw the sharks back into the ocean.Sharks are in the bottom of the food chain in the oceans ecosystem.WildAid and the WWF are environmental protection groups in China.Sharks fin s are good for health.2.Complete the fact sheet in 3a. V. Practice (3b) (1) Read the passage and dill in the blanks with the words in the box. (2) Retell the passage according to the words below.sharks fin soup, in southern China each time cut off no longer not onlybut also at the top drop be endangered the strongest around 70 million fallen by over 90 percent WildAid and the WWF develop laws scientific studiesVI. Summary VII.HomeworkFinish the exercises of Section A in Unit13.