九年级英语上册《Unit 4 Amazing Science》Topic2 SectionD 教案 仁爱版.doc

九年级英语上册《Unit 4 Amazing Science》Topic2 SectionD 教案 仁爱版
The main activities are 1a and 3. 本课重点活动是1a和3。
Ⅰ. Teaching aims and demands 教学目标
1. Learn a new phrase:
run away
2. Learn some useful sentences:
(1) This method worked well at night as long as the weather was good and the stars could be seen.
(2) To his surprise, he was caught by the police.
3. Review the simple past passive voice.
4. Talk about new technology GPS.
Ⅱ. Teaching aids 教具
实物或图片/多媒体课件/录音机
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:8分钟)
教师出示图片，创设情景，复习一般过去时被动语态的用法。激发学生的兴趣，培养学生的口语表达能力，为导入新课作准备。
(利用实物或图片，以师生问答形式复习一般过去时的被动语态及重要词组和句型。)
T: How are you, boys and girls?
Ss: Fine, thank you. And you?
T: I’m very well. So far, we have learned something about the new technology and inventions in the world. Do you remember them all?
Ss: Yes, we have learned the light bulb, the car, the cellphone, TV set, the digital camera, the MP3 player …
(出示MP3的图片。)
T: Very clever. Please look at the picture. What’s this in English?
S1: It is an MP3.
T: What’s it used for?
S2: It’s used for listening to music.
T: What’s it made of?
S3: It’s made of plastic.
T: Where was it invented?
S4: It was invented in Korea.
T: When was it invented?
S5: It was invented in 1998.
T: OK, very good.
(出示手机的图片。)
T: When was the cellphone invented?
S6: It was invented in 1973.
T: Where was it invented?
S7: It was invented in America.
Step 2 Presentation 第二步 呈现(时间:12分钟)
创设语境，呈现新词汇。然后阅读1a，完成1b。让学生了解全球定位系统，培养学生的快速阅读能力。
1. (紧承上面的话题，以手机为切入点，导入新课。)
T: Cellphones are widely used all over the world. It’s reported that over 93% of families in cities own cellphones, but cellphones could be lost easily. Have you watched the movie “A World without Thieves”?
Ss: Yes.
T: In the movie, a lot of cellphones were stolen by “Liu Dehua”. We all know that a thief would run away very quickly and then hide in a secret place as soon as he or she steals a cellphone. In the past, he or she couldn’t be found. But nowadays, one of the new technologies can be used to find the lost cellphones easily. Is it amazing? OK, let’s read 1c and think about the question: Why the lost cellphones could be found easily now?
(板书并要求学生理解thief；掌握run away。)
thief
run away
(一分钟后。)
T: Have you finished reading? Do you want to know the answer? Well, let’s begin the new lesson.
2. (播放多媒体，简单介绍GPS，让学生了解其意义，展示GPS的背景知识。)
T: Look at the screen. GPS is short for the Global Positioning System.
(板书并要求学生理解。)
global
T: GPS is like man-made stars. We can use it at any time, in any place and in any weather to find out our position. The early explorers used the stars as landmarks to know where they were and in which direction they were going. This method worked well at night as long as the weather was good. But it didn’t work so well during the rest of the time.
(板书并要求学生了解。)
landmark
3. (播放1a录音。要求学生认真听录音并注意画出关键词。教师板书。)
T: Boys and girls, just now I talked something about GPS. Now let’s listen to the tape to learn a passage about GPS, please underline the key words.
(板书)
question, explorers, landmarks, find out, direction, as long as, problem, like, use, shape
Step 3 Consolidation 第三步 巩固(时间:8分钟)
利用关键词及1b中的问题复述1a，完成1c。巩固所学的知识，提高学生的英语表达能力。
1. (让学生阅读1a，然后讨论1b中的问题，四人一组完成1b。)
T: Please read 1a carefully and discuss the questions in 1b in groups of four, then finish 1b.
(学生讨论完后，小组长要整理好答案汇报。教师抽查部分小组的答案，再归纳总结。)
2. (根据板书的关键词来复述1a，分男、女两组以竞赛方式进行，激发学生的兴趣，熟悉所学的知识。)
T: Boys and girls, let’s begin our competition to retell 1a. Question.
Girls: That was a big question when we first explored our world long ago.
T: Explorers.
Boys: The early explorers found that the stars in the sky were good landmarks.
T: Find out.
Girls: Using the stars, they could find out where they were and in which direction they were going.
T: As long as.
Boys: This method worked well at night as long as the weather was good and the stars could be seen.
T: Problem.
Girls: But it didn’t work so well during the rest of the time. That was a problem.
T: Like.
Boys: GPS is like a man-made star.
T: Use.
Girls: We can use it at any time, in any place and in any weather to find out our position.
T: Shape.
Boys: GPS can also be used to study the shape of the earth.
T: OK, you did very well. Boys and girls are all excellent.
3. (归纳总结，回应呈现部分，完成1c。)
T: Now, we have known GPS very well. I think you have found out the answer to the question. S1, could you tell me why the police could catch the thief easily?
S1: Because of GPS.
T: That’s right. When the thief was using the cellphone, the police could use the information GPS offered to find out the position of the cellphone. So we can say it was GPS that helped the police catch the thief. S2, what do you think GPS will be used for in the future?
S2: It can be used to study the shape of the earth.
T: What do you think of it, S3?
S3: We can use it at any time, in any place and in any weather to find out our position.
T: OK, in short, it is very useful to us.
Step 4 Practice 第四步 练习(时间:13分钟)
让学生自主归纳本话题的语言项目，然后听2a和2b录音，完成2a和2b。复习一般过去时被动语态的用法和本话题的功能意念句，培养学生自主学习能力。
1. (让学生整理本话题的语言点、重点句型并放入自己的“百宝箱”。培养学生自主学习和归纳总结的能力。)
(语言点及重点句型。)
be made of / from
be developed / invented in / by
be used for
I hope your dream will come true.
I wish I could go into space some day.
It is said that …
DNA is the same in every part of your body.
be similar to
No one knows for certain.
They will no longer want to be our servants, but our masters.
as long as
In short, this robot is very useful to us.
(学生做完后，教师进行抽查并指导。)
2. (让学生听2a和2b的录音，并跟读。然后完成下面的练习。)
T: Listen to 2a, 2b and read after them. Then finish the following exercises.
(将下面的句子由主动语态变为被动语态，或者将被动语态转化为主动语态。)
(1) I learned a lot of information about spaceships from Mr Lee.
(2) I was allowed to play computer games yesterday.
(3) The digital camera was invented in 1975.
(4) Guglielmo Marconi invented the radio in 1895.
(5) Shenzhou Ⅵ was launched by China in 2005.
(答案)
(1) A lot of information about spaceships was learned from Mr. Lee by me.
(2) They allowed me to play computer games yesterday.
(3) People invented the digital camera in 1975.
(4) The radio was invented in 1895 by Guglielmo Marconi.
(5) China launched Shenzhou Ⅵ in 2005.
3. (给出本话题中的功能意念句或其他重点句型，两人一组进行游戏。让一个学生说出一个句子的前一部分，另一个学生必须快速说出整个句子，然后交换角色。统计说完所有句子的时间，时间最短的为优胜者。完成2b。)
T: Boys and girls, let’s play a game. I will give you some important sentences of this topic on the blackboard. You play the game in pairs. One says the front part of a sentence, the other says the whole sentence as quickly as possible. Then exchange the roles. Just like this:
A: I wish…
B: I wish I could go into space some day.
Are you clear?
Ss: Yes.
T: The pair that finishes in the shortest time is the winner. OK, begin!
(1) I wish I could go into space some day.
(2) I hope your dream will come true.
(3) There is DNA in most living things, including human beings.
(4) No one knows for certain, but most people think that robots will be part of our lives.
(5) In short, this robot is very useful to us.
Step 5 Project 第五步 综合探究活动(时间:4分钟)
学生小组合作，设计一个新发明，并画出来，完成3。培养学生合作与探究的精神。
1. T: Look at Kangkang’s invention and the information. What’s the name of his invention?
Ss: Plar.
T: What’s it used for?
Ss: It’s used for both flying and driving.
T: Good! Do you want to be an inventor?
Ss: Yes.
T: OK! Discuss in groups and design your own invention. You’d better draw a picture of it and write down the information about it. Are you ready?
Ss: Yes.
T: OK, start please.
(学生小组合作。完成后，选几名学生谈论他们的新发明。)
2. Homework:
Search the Internet for more technologies and inventions. Share them with your classmates.
板书设计：
When was it invented?
Section D
run away
GPS: the Global Positioning System
This method worked well at night as long as the weather was good and the stars could be seen.