九年级英语上册《Unit 1 The Developing World》Topic2 SectionB 教案 仁爱版.doc

Unit 1 The Developing World
Topic 2 SectionB
The main activities are 1a and 2a. 本课重点活动是1a和2a。
Ⅰ. Teaching aims and demands 教学目标
1. Learn the new word:
increase
2. Master these sentences:
(1) What’s the population of China?
(2) It is increasing by 80 million every year.
(3) Which country has the largest population?
(4) So it is.
(5) The problem is more serious in developing countries.
(6) China has already carried out the one-child policy to control the population.
3. Learn how to read the numbers:
million, billion.
Ⅱ. Teaching aids 教具
录音机/多媒体课件/小黑板/世界人口示意图
Ⅲ. Five-finger Teaching Plan 五指教学方案
Step 1 Review 第一步 复习(时间:15分钟)
1. (检查上节课教师布置的探究性活动，组织学生互评，教师选出较好的几份点评。)
T: Many students wrote very well. You can talk about a lot of social problems.
(由学生谈论的人口问题，引入本课话题——人口数量。)
T: Some students have talked about the population problem. As we know, it is hard to improve our living conditions, because we have a large population. Now, what’s the population of our country?
(由学生举手回答。)
S1: China has 1. 3 billion people. It’s the largest population of the world.
T: The U.S.A. is the strongest developed country. Can you tell me what’s the population of the U. S. A. ?
(板书并讲解。)
the developed/developing country
S3: The U.S.A. has about 250 million.
S4: I think it has about 300 million.
T: Stop. Now look at the multimedia.
(看多媒体，展示1a中图表。)
T: Here is a diagram about some countries’ population. Look at the U.S.A. . The U.S.A. has a population of 296 million. Now look at the diagram. Tell me about Indonesia’s and Brazil’s population.
S5: The population of Indonesia is 222million.
S6: Brazil has 184 million.
T: Well done. We have known some countries’ population. What’s the population of the world?
S7: I don’t know.
S8: The world has a population of 6.5 billion.
T: Right. There is 6.5 billion in the world. And the world’s population is increasing by 80 million every year.
(教师重读increasing一词。)
T: Look at the chart, it shows that the population in developing countries is larger than that in developed countries, doesn’t it?
Ss: Yes, it does.
T: In order to solve the population problem, what policy does China carry out?
(板书并讲解。)
carry out
Ss: One-child policy.
Step 2 Presentation 第二步 呈现(时间:7分钟)
(教师放1a录音，让学生找出含数词的句子。)
T: Open your books. Listen to the tape carefully and underline the sentences with numbers.

(教师再播放一遍，让学生跟着磁带默读一遍。)
T: Look at your books. Pay attention to these sentences.
(板书)
What’s the population of the U. S. A.?
296 million.
(教师重点解释这个句型，引出类似的句子。)
A: What’s the population of China/India…?
B: It’s about 1. 3 billion/…
(教师利用前面的世界人口示意图，让学生一问一答。)
S1: What’s the population of Brazil, ××？
S2: It has about 184 million. What’s the population of China, ××？
S3:…
T: It is wonderful. Please read the dialog and discuss the key sentences.
(教师板书并讲解这三个句子，使学生加深对文章的理解。)
1. The world’s population is increasing by 80 million every year.
2. The population in developing countries is larger than that in developed countries.
3. China has already carried out the one-child policy to control the population.
(让学生齐读课文一遍。)
Step 3 Consolidation 第三步 巩固(时间:8分钟)
(读1a，让学生完成1b。)
T: Look at the form. Then fill it out.
Country
China
India
the U.S.A.
Indonesia
Brazil
Population

(本表格很简单，一分钟后，老师叫几位学生核对答案。)
T: Great. I think you all did well.
(学生两人一组进行问答练习。)
S1: What’s the population of China?
S2: It’s about 1. 3 billion. What’s the population of India?
S1: It is about 1. 1 billion. What about the U.S.A.?
S2: …
(以比较快的速度来完成训练。)
T: OK. I think you have mastered the dialog. You can practice by yourselves after class.
Step 4 Practice 第四步 练习(时间:10分钟)
1. T: We have learnt many countries’ population. But how to express the numbers? First let’s look at the blackboard.
(板书)
218 5 366 306
(教师由以前学的百、千位引入百万、十亿。教师可以先提问后进生，让这些学生有成就感以提高他们的兴趣。)
S1: two hundred and eighteen
S2: five thousand three hundred and sixty-six
S3: three hundred and six
(教师总结一下如何读百位、千位，指出特别易出错点和个别学生表达的错误。)
T: Now, look at these numbers. Can you read these numbers?
(板书)
736 547 8 736 062 9 839 800
(教师先讲述三位一划分原则，再让学生运用。给学生讨论时间，然后提问学生。)
S4: 736 547 Seven hundred and thirty-six thousand, five hundred and forty-seven
(可以先提问较好的学生，总结一下。教师必须说明and，—，thousand放的位置，以及注意量词在这不加“s”的形式，让学生在自己思考时有注意的地方。)
T: Now, I will ask the other students to read the two numbers.
S2: 8 736 062 eight million, seven hundred and thirty-six thousand and sixty-two
S3 9 839 800 nine million, eight hundred and thirty-nine thousand, eight hundred
T: You are great. Most of you have mastered how to read the numbers. Please look at the numbers in 2a. Read them together.
2. T: Let’s play a number game. I will show you some numbers. Read them quickly and correctly in groups.
(每个小组各选派三位学生，由教师统分，构建评分机制激发学生兴趣。)
(板书)
7 398 500 406 000 000 17 602 018 000 676 302 320
(教师在黑板上画出计分表。)
G1
G2
G3
G4

3. T: Look at the pictures of 2b and describe them.
(让学生通过自己的猜测，用所学过的语言知识把图片描述一下。教师可以先提问程度稍差的同学，复习较大数字的读法并把新旧知识结合起来。)
S1: Picture F The jacket costs￥326. 00.
S2: Picture B It’s 6 575 miles away from Beijing to Toronto.
S3: Picture A The mountain is 8 844. 43 meters high.
S4: Picture E The population of China is 1. 3 billion.
S5: Picture D I think the population of Canada is 210million.
S6: Picture C The animal lived in 210 million years ago.
T: Yeah, very good. You are great. Now let’s listen to the tape of 2b and number the pictures you hear. After that, let’s check the answers.
(教师核对答案。)
Step 5 Project 第五步 综合探究活动(时间:5分钟)
1. T: The population problem is the biggest one in China. Now let’s discuss the question: What
are the problems of China’s population?
(学生小组讨论。)
T: Who can talk about it?
(学生可能要说的很多，但有些语言他们表达不清楚，教师加以引导，使他们尽量用简洁的语言表达清楚。)
S1:The population is still increasing.
S2:The people in the countryside can’t obey the one-child policy.
S3:There are more and more old people in some big cities.
T: Very good. But what do you think of the future of China’s population? Please discuss it.
(鼓励学生举手，自觉起来表达自己的观点。)
S4:The population of China will be 1.5 billion in 2050.
S5:Maybe China will have a population of 1.7 billion in 2050.
(学生可能做出种种猜测。)
2. Homework:
Write a report about the population of the future in China.
板书设计：
What a large population!
Section B
the developed/developing country —What’s the population of …?
carry out —It has … billion/million …
population problem It is increasing by 80 million every year.
China has already carried out the one-child policy to control the population.