Unit 7 Know Our World Lesson 38 The World Is a Big Place 教学设计

Lesson 38 The World Is a Big Place
教学目标：
1.懂得有关介绍世界人口和大洲大洋的单词和短语:planet,total,increase,surface,
Indian,in total,one third,be covered with,two thirds,in the future
2.掌握表达运用介绍世界人口和大洲大洋的句型:And by 2050,the world’s population may reach 9 billion.There are seven continents…The earth has only one big ocean…
3.初步懂得被动语态的用法。
重点难点：
1.掌握有关人口和世界地理的单词:population,continent,ocean,land
2.掌握介绍大洲大洋:There are seven continents…The earth has only one big ocean…
3.掌握以下重点句子:And by 2050,the world’s population may reach 9 billion.We can’t live in water,and only about one third of our planet is land.It is not easy to live in those places.It must be treated well for our children and for our children’s children,too!
教学思路：
本课时的教学内容是冀教版八年级下册英语第七单元的第二课时,主要涉及介绍人口和世界地理的情况。在授课之前先让学生通过网络查询有关世界人口和大洲大洋的知识。课上可以让学生通过小组合作的形式相互交流;教师通过幻灯片、图片向学生展示大洲大洋的照片,同时告诉学生如何用英语介绍这些地理知识,懂得世界人口,懂得大洲大洋。
教学准备：
设计教学PPT,录音机,多媒体,图片和单词卡片。
教学过程：
StepⅠ.Lead in
Leading in 【情景1】
T:Hello,boys and girls.Do you know about the earth?
Ss:Yes/No.
T:What do you know about the continents?
S1:There are seven continents.
S2:Asia.
T:What’s the population of the world?
S3:7 billion in 2010.
S4:8 billion by 2025.
S5:9 billion by 2050.
Show some pictures about the continents and the oceans to the class.Let the students discuss the questions in groups.Then let them present their results in front of the class.
[设计意图]　利用学生学过的内容,以提问的方式开始,谈论地理人口知识,轻松进入语境,进而介绍生词,照片使学生感兴趣,运用学生所学的知识与照片相结合。
Leading in 【情景2】
Greet the class.
T:Hello! Boys and girls!
Ss:Hello! Mr./Ms.XX.
Ask the students to introduce the population in class.
S1:It’s large.
S2:It’s big in China.
S3:Bigger and bigger.
Show the new word and show the picture of the continents and the oceans to the students.
T:How many continents and oceans are there in the world?
S4:Seven continents.
S5:And four oceans.
…
[设计意图]　运用学生所学的知识,从谈论熟悉的入手进入新内容的学习,运用实物或图片帮助学生学习生词,直观、感性、形象。
StepⅡ.Presentation
If some students feel the passage is too long,the teacher can divide it into two or three parts.Then ask them to read them in groups.After a while,ask them to read the passage one by one.
Please pay attention to the long sentences:
(1)In the year 2010,the world’s population was over 7 billion in total.
(2)We can’t live in water,and only about one third of our planet is land.
(3)Antarctica is covered with snow and ice all year round.
(4)The earth is our home now,and it will be our home in the future.
[设计意图]　分小组朗读课文,看一看哪一组读得好。在竞争中整体掌握本课内容。
StepⅢ.Listening
T:Listen to the tape with your book closed and fill in the blanks.
1.In 2010,the world’s population was 　　　　.?
2.People can’t live 　　　　on the earth.?
3.Oceans cover 　　　　of the earth’s surface.?
【Keys】　1.over 7 billion in total　2.everywhere　3.two thirds
[设计意图]　加深同学们对细节的掌握,学生们在有了一定的信息输入之后,才能在这一部分写出所缺信息。
StepⅣ.Post-listening Activities
After listening to the tape,get the class to read it aloud.Ss read aloud.Focus on the stressed words,pronunciation and intonation.
[设计意图]　学生在听了细节之后,朗读巩固,训练学生的语音语调,培养学生运用目标语言进行交际的能力。
StepⅤ.Reading
1.Read the text and answer the following questions.
(1)What may the population be in the year of 2050?
(2)Which ocean is the largest?
2.Then ask some volunteers to read the passage and do the exercises in No.1 in Let’s Do It!
3.Read the text again and fill in the blanks.
(1)There are seven　　　　.?
(2)We can’t live in water, and only about　　　　 our planet is land.?
(3)It’s not easy to　　　　 those places.?
(4)It must　　　　for our children and for our children’s children, too!?
【Keys】　1.(1)The world’s population will reach 9 billion. 　(2)The Pacific Ocean.　2.Paragraph 1:c, Paragraph 2:e, Paragraph 3:a, Paragraph 4:d, Paragraph 5:b　3.(1)continents　(2)one third of　(3)live in　(4)be treated well
☆教材解读☆
1.In the year 2010,the world’s population was over 7 billion in total.?
total 作名词,意思是“总计”。in total意思是“总共”,和in all 同义。
The ruler is 1 yuan and the pen is 10 yuan,so the total is 11 yuan.尺子1元钱,钢笔10元钱,所以一共是11元钱。
My family members are 20 people in total.
我家家庭成员共有20人。
【拓展】　total 还可以作形容词,一般用在名词的前面作定语,表示“总共的,完全的”,副词形式是totally。
His total money was about 100 yuan.
他所有的钱大约是100元。
He has a totally new change.
他有了一个全新的改变。
2.We can’t live in water,and only about one third of our planet is land.?
句中one third 意思是“三分之一”,也可以写作one-third。
One third of the students in the class are girls.班上三分之一的学生是女生。
【拓展】　英语中分数的表达:
(1)分子用基数词表示,分母用序数词表示,当分子大于1时,分母要用复数形式,如:one fifth五分之一;two seventh七分之二。
(2)表示“……中的几分之几”,一般用 “分数+ of +名词”这一结构。
Only three tenths of people agree with you.只有十分之三的人同意你的观点。
(3)当分数作主语时,谓语动词的单复数形式由后面所接名词的形式来确定。若后面的名词是可数名词复数时,谓语动词用复数形式,若后面的名词是可数名词的单数或者不可数名词时,谓语动词则要用单数形式。
Two fifths of the students are from China.
五分之二的学生来自于中国。
Three fourths of money is for education.
四分之三的钱用于教育。
　　3.Antarctica is covered with snow and ice all year round.?
be covered with 意思是“被……覆盖”,是被动语态,它的主动形式是“cover…with…”,意思是“用……覆盖……”。被动语态的基本结构为“be动词+ 及物动词的过去分词”。
In winter,everything is covered with snow.在冬天,一切都被雪覆盖了。
The farmer covers the vegetables with some plastic in cold weather.在寒冷的天气里,农民用塑料布盖上蔬菜。
All her homework was done in time.
她的所有作业及时做完了。
【拓展】　cover作动词时,还可以表示“占地”。
Our school covers 0.5 square miles.
我们学校占地0.5平方英里。
4.The earth is our home now,and it will be our home in the future.?
句中future作名词,意思是“将来”,构成短语in the future,意思是“在将来”。
Children are studying for the future.
孩子们正为了将来在学习。
Our dreams will come true in the future.
我们的梦想在将来一定能实现。
【辨析】　in the future,in future
(1)in the future意思是“在将来”,多指长时间以后的未来。
I believe you can become a policeman in the future.我相信你将来能够成为一名警察。
(2)in future意思是“今后”,一般指从现在开始的以后,相当于from now on。
You must finish your homework by yourself in future.今后你一定要自己完成作业。
【拓展】　future 还可以作形容词,表示“将来的”。
Our future life will be better and better.
我们未来的生活将会越来越好。
[设计意图]　学生通过阅读课文,懂得重点内容,并且通过回答问题来巩固对课文的理解和掌握;朗读课文,完成课后题1,继续进行填空练习,加深对课文的理解。
StepⅥ.Complete Let’s Do It!
Ask the students to read the lesson and finish No.1,No.2 and No.3.Read for several times until the students can understand the lesson themselves.Ask the students to finish them in groups.
[设计意图]　Let’s Do It! 中的No.1、No.2和No.3 都是针对课文内容的。认真阅读课文,训练阅读能力。No.1强调课文段落理解,No.2针对文中出现的重点单词进行训练,No.3综合理解课文关于七大洲的掌握情况。同时分组教学培养合作精神,训练阅读能力。
StepⅦ.Task
Ask students to come to the front of the classroom,and some start walking towards others as the teacher says “go”.They must stop as the teacher says “stop”.Then they can make a new group to finish No.4.
[设计意图]　课外任务的重点是训练本课内容的拓展延伸,懂得更多的地理知识,注意课文内容,考查学生的分析总结能力,尤其是口语表达,巩固学习与地理人口有关的知识。
StepⅧ.Exercises
T:Now,look at the sentences with some missing words.Please use your own words to fill them.
1.His school has 1 000 students　　　　(总数).?
2.　　　　(四分之三) of the players are coming.?
3.The robots can solve all the problems easily 　　　　(在将来).?
4.Our city has 　　　　(人口) 700 000.?
5.China is larger than 　　　　(其他任何国家) in Asia.?
【Keys】　1.in total　2.Three fourths　3.in the future　4.a population of　5.any other country
[设计意图]　以学评教、强化落实。当堂检测主要是由本节内容组成的形成性评价,逐渐减少呈现句中的信息,让学生补充,让他们得到充分的训练。
StepⅨ.Homework
1.Read the lesson loudly with your group members.
2.Copy the new words twice.
[设计意图]　口头练习和单词记忆相结合,复习、归纳,注重语言知识的操练与积累。
Lesson 38　The World Is a Big Place
planet,total,increase,surface,Indian
in total,one third,be covered with,two thirds,in the future
And by 2050,the world’s population may reach 9 billion.
There are seven continents…
The earth has only one big ocean…
We can’t live in water,and only about one third of our planet is land.
It is not easy to live in those places.
It must be treated well for our children and for our children’s children,too!
教材习题解答
【Lesson 38】
1　Paragraph 1—c　Paragraph 2—e　Paragraph 3—a　Paragraph 4—d　Paragraph 5—b
2　1.increasing　2.total　3.driest　4.surface　5.billions
3　Europe (6)　South America (4)　Asia(1)　Africa(2)　Australia (7)　Antarctica (5)　North America (3)