九年级英语上册 Unit 4 Topic 2 When was it developed Section C教案 仁爱版.doc

九年级上仁爱版英语Unit 4 Topic 2 When was it developed Section C教案
The main activity is 1a. 本课重点活动是1a。iu
Ⅰ. 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.
Ⅱ. 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
Ⅲ. 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。)
Invention
Inventor
Year
car
Karl Benz
1885
radio
Guglielmo Marconi
1895
light bulb
Thomas Edison
1879
T: 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! I’ll 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: I’d like to own a dictionary. It can help me learn English well.
T: Very good. Anyone else?
S7: I’d like to own a car. It’s very convenient.
S8: Which invention would you like to own, Mr. / Miss …?
T: I feel very tired after work and I don’t feel like doing any housework at that time. So
I’d 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: I’d 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! It’s just like a servant. It’s 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: That’s 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 haven’t caused us any problems.
(板书并解释)
for certain
Robots haven’t 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, we’ve learned something about robots. And today we’ll 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, war
2. (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, aren’t 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, what’s 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 don’t 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 don’t complain. They can’t think for themselves.
T: Maybe. Now it’s your turn, Group 3. What’s your opinion?
G3: We don’t think robots are meant to be our servants. They are important. They can do a lot of work for us. But we mustn’t 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 doesn’t 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, let’s have a competition among groups. Let’s make sentences with these words. Don’t look at your books and make some sentences about robots. You can use the same sentences as the passage if you remember.
(让学生用教师提示的关键词进行造句竞赛，为活跃课堂气氛，可以将班级分为三大组，并把竞赛结果记录在黑板上，最后必须进行总结和鼓励，充分调动全体学生的积极性。)
T: Future.
Ss: What will our future be like?
T: Certain.
Ss: No one knows for certain.
T: Friendly.
Ss: Will robots be friendly or unfriendly?
(完成一段后，再让刚才发言的同学在没有老师提示关键词的情况下，快速说出自己的
那个句子，将一段完整的短文复述完毕。教师总结这一小段的竞赛情况并板书。)
T: I think Group 1 and Group 2 are very active. Group 3, you need to work hard. I’m sure you’ll do better next time.
Group 1 Group 2 Group 3

2. (出示幻灯片，让学生完成下面对机器人的介绍，巩固对文中出现的关键词和短语的掌握。)
T: Please keep your books closed. Fill in the blanks according to 1a.
So far, robots haven’t us any problems. They work for us like all the time. They help us do and work. People are at the development of robots. In a few years, perhaps robots will think and for themselves. However,
robots can think for themselves, problems may . Perhaps there will be a between human beings and robots.
T: Open your books and read 1a again. Check the answers by yourselves.
Step 4 Practice 第四步 练习(时间:8分钟)
1. (出示自制单词卡片和写有单词释义的卡片，做找朋友的游戏。A组同学持有单词卡，B组同学持有单词释义的卡片，让A组同学说出自己的单词，B组同学拿出单词释义卡找朋友。完成1b。)
A组
warn
cause
servant
certain
B组
To make something happen or appear.
A person who is paid to do housework for a family.
To tell somebody that something bad or dangerous may happen so that they can prevent it.
Sure and confident, without any doubts.
2. (播放2录音，让学生完成2。)
T: Let’s listen to the tape, and finish 2 by yourself. We’ll listen to the passage twice.
(板书，讲解。)
contribution n.
make a contribution to+n./doing sth.
(听完后，核对答案。)
答案：
1. more than
2. invention
3. health
4. examine
5. used
6. should
(为了使学生加深对所听内容的理解，提两个问题让学生回答。)
T: What are x-rays used for?
Ss: They are used for examining patients’ bodies.
T: Why should it be used properly?
Ss: Because it has some bad effects on our health.
Step 5 Project 第五步 综合探究活动(时间:6分钟)
(根据3中的要求，让学生设计一个新发明，并画出来。完成3。)
T: Look at Kangkang’s invention and the information. Discuss in groups and design your own
invention. Then draw a picture of it.
(学生准备好以后，选出其中三个准备较好的学生，要求他们谈论自己的设计。)
T: Who would like to show your design?
(也可用相互提问的方式扩大练习范围，让全体学生都有机会参与探究活动，利用所学的语言和信息进行交流。)
板书设计：
When was it developed?
Section C
for certain
make a contribution to
So far, robots haven’t caused us any problems.
They help us do dangerous and difficult work.