unit4 topic 2 when was it invented 教案5（仁爱版九年级上）

九年级上仁爱版英语Unit 4 Topic 2 Section C教案The main activity is 1a. 本课重点活动是1a。. Teaching aims and demands 教学目标1. Learn some new words and expressions:servant, for certain, housework, make a contribution to No one knows for certain, but most people think that robots will be part of our lives.2. Discuss the advantages and disadvantages of robots. . Teaching aids 教具录音机/单词卡片/写有单词释义的卡片/多媒体课件/一些机器人的图片(或教学挂图)/幻灯片. Five-finger Teaching Plan 五指教学方案Step 1 Review 第一步 复习(时间:13分钟)1. (出示幻灯片，同学们根据幻灯片的图表，用过去时的被动语态做对话练习。)InventionInventor YearcarKarl Benz1885radioGuglielmo Marconi1895light bulbThomas Edison1879T: Boys and girls, we have learned many inventions during the last period. Look at the table and make dialogs like this:A: When was the car invented?B: It was invented in 1885.A: Who was the car invented by?B: It was invented by Karl Benz. T:OK! Ill ask two students to ask and answer questions about the radio. S1: When was the radio invented?S2: It was invented in 1895. S1: Who was the radio invented by?S2: It was invented by Guglielmo Marconi. (再找两组同学做类似对话。)2. (师生互动，导入新课。)T: We have learned many inventions such as computers, digital cameras, TV sets, light bulbs.Which invention do you like best? Can you tell me?S3: Computers. S4: Cars. S5: T: Why do you like computers best, S3?S3: Because I can learn a lot on the computers. Playing computer games is very exciting. T: Which invention would you like to own, S6?S6: Id like to own a dictionary. It can help me learn English well. T: Very good. Anyone else?S7: Id like to own a car. Its very convenient. S8: Which invention would you like to own, Mr. / Miss ?T: I feel very tired after work and I dont feel like doing any housework at that time. So Id like to own a robot. Do you know robots?(教师释义并板书，要求掌握housework。)housework n.Ss: Yes. But why?T: Id like a robot to help me do a lot of housework. It can cook for me. It can clean the house for me. In cold winter, it can wash clothes for me. Ha! Its just like a servant. Its dangerous for me to clean the outside of the windows. OK, let the robot do it. (板书并要求掌握生词servant。)servant n.Ss: Thats very interesting.T: Yes. Study hard, and maybe you can invent something useful one day. 3. (多媒体展示机器人，教师介绍导出本课的重点句型。)T: Look! This is a robot. I treat it as my servant. Will it be friendly or unfriendly? No one knows for certain. So far, robots havent caused us any problems.(板书并解释)for certain Robots havent caused us any problems.T: They work for us like servants all the time and help us do dangerous and difficult work. (板书) They help us do dangerous and difficult work. T: With the development of our technology, maybe robots will think and act for themselves. They will no longer want to be our servants, but our masters. Do you think it is very dangerous? Maybe there will be a war between robots and human beings. Step 2 Presentation 第二步 呈现(时间:10分钟)1. (播放录音，让学生在文中画出关键词和短语。)T: Boys and girls, weve learned something about robots. And today well learn a passage about robots. First listen to the tape carefully and find out the key words and expressions. Try to retell the text.future, certain, friendly, problems, servants, help, development, perhaps, however, no longer, warn, if, lucky, treat, war2. (让学生阅读1a, 分小组讨论1c中的话题。)T: Read the passage by yourselves and discuss the following questions in pairs. (1)Do you think that robots will be part of our lives in the future?(2)Robots are meant to be our servants, arent they?(3)Do you think robots can think or act for themselves?(4)Why does the title have a question mark?(为集中学生注意力，节约有限的课堂时间，把整个班级分成四个小组，每个小组要选择并讨论其中一个话题。给学生五分钟时间阅读短文和准备讨论的话题。)T: Group 1, whats your topic?G1: Question 1. T: Do you think that robots will be part of our lives in the future?G1: Yes, we think so. They can help us do some dangerous and hard work. They work fast and they are never tired. T: Group 2, what did you talk about?G2: We talked about Question 3. We dont think robots can think or act for themselves. Human beings created robots. So we can control them. Robots can work for human beings, and they dont complain. They cant think for themselves. T: Maybe. Now its your turn, Group 3. Whats your opinion?G3: We dont think robots are meant to be our servants. They are important. They can do a lot of work for us. But we mustnt treat them as our servants. They should be our friends. We can talk with them. T: Yes, I agree with you. And what do you think of the title, Group 4? Why does the title need a question mark?G4: Because the writer is not sure whether robots will be our servants in the future. (or the writer doesnt think that robots will be our servants. )Step 3 Consolidation 第三步 巩固(时间:8分钟)1. T: Read the words you underlined just now. Make sure of knowing what they mean. Now, lets have a competition among groups. Le