Unit 4 Topic 1 Section B 教案.doc

Unit 4 Amazing ScienceTopic 1 Section BTeaching aims and demands 1. Learn some new words: clone, experiment, direct2. Go on learning the past simple passive voice:(1) When was it invented?(2) It was invented in 1879. 3. Learn some information about“clone”. Teaching aids 录音机/多媒体课件或教学挂图Teaching Plan Step 1 Review 1. 做一个链式游戏，以小组为单位，就课本昨天学过的计算机，MP3，英语学习机，手机，数码相机或学习用具等进行对话，用be made of / be made in / be made from / be used for的句型进行操练。以一小组的第一个同学回过头去问下一位同学，依次接着往下问。T: Boys and girls. Lets play a game. Ask questions one by one. S1: How do you say it in English? (钢笔)S2: A pen. S1: Whats it made of?S2: Its made of steel and plastic. S1: When was it made?S2: It was made in 2006. S1: Whats it used for?S2: Its used for writing. T:Do you understand?Students: Yes. T: OK. Lets begin. Step 2 Presentation 1.播放1a录音，让学生回答以下问题。然后核对答案。T: Listen to the tape, and then answer the following questions. (1)Who invented the light bulb?(2)When was the light bulb invented?(3)When was the radio invented?2.指导学生阅读3a, 教师板书文中的关键词和短语，为学生复述短文做准备。T: We have learned a lot of inventions. Now we are going to learn something new about a great invention clone. Please read 3a carefully. And finish 3b. You should finish it in 5 minutes. 3.让学生听3a并跟读，画出生词和重点词组。T: Please listen to 3a. And read after it. Find out the new words and important phrases.(学生听完录音后，与教师板书的内容对照，并朗读课文3a，教师讲解本课重要词组。)Step 3 Consolidation1.引导学生看黑板上表格中的信息，讲述三项发明的情况，巩固1a。鼓励学生使用本课的目标语言：一般过去时的被动语态。T: Now, look at the chart on the blackboard and try to say something about the inventions we Learned just now. S1: The light bulb was invented by Thomas Edison in 1879. S2: The radio was invented by Guglielmo Marconi in 1895. S3: The airplane was invented by Wilbur and Orville Wright. It was invented in 1903. T: Well done! Now suppose you are Jane and Michael. Youre visiting the Science Museum. Talk about the three inventions as we learned just now. Then act it out. Get ready for it for 3 minutes, OK?T: Just now, were learned something about cloning, look at the words on the blackboard. Can you say something about“clone”?S3: Dolly, a cloned sheep?S4: Yeah. Its well-known. S5: Cloning is known as a great experiment all over the world. S6: Good!S7: She was created in Scotland a few years ago. S8: So far, man has cloned rabbits, sheep, cows, mice, pigs and some other animals. T: Excellent! Now, repeat what you said just now one by one, and you get the whole paragraph. Step 4 Practice用多媒体展示一些图片，并要求学生用过去时的被动语态造句。巩固本课的语言点。T: Make up sentences according to the example and practice more. For example:(展示computer图片)Computers were invented in America. (展示神发射图。)Students: Shenzhou was sent up into space in China in 2005. (展示张艺谋导演的大片。)Students: The film was directed by ZhangYimou in 2006. (展示radio图片。)Students: It was invented in 1895. Step 5 Project T: Please design your own invention after discussion. Step 6 HomeworkPlease write a short passage. You can choose a new technology or a gr