Lesson 23 The Internet—Good or Bad 教学设计

Lesson 23 The Internet—Good or Bad
教学目标：
1.理解运用本课重点单词或短语:advantage,simple,coin,cause,less,steal,be worried about,in seconds,far away,aside from,take up
2.理解一些介绍上网情况的句型:
It opens up the world to us.
And if a friend lives far away,the Internet makes it easy to stay in touch.
It may even cause them to be less social with family and friends.
重点难点：
1.正确懂的与互联网有关的词:connect,open,online,web,tool
2.掌握更多关于使用互联网的方法。
3.懂的和运用以下重点句式:
People are able to connect and share information in seconds.
In many ways,it makes life easier and simpler.
Spending too much time online is harmful to people’s health.
The Internet can be a useful tool,but don’t let it take up all of your time.
教学思路：
本课时的教学内容是冀教版八年级下册英语第四单元的第五课时,主要涉及介绍一些上网的好处与坏处。在授课之前先让学生通过调查其他学生上网的一些情况。课上可以通过让学生小组合作的形式进行相互交流;同时,教师通过幻灯片、图片、照片等向学生展示一些上网活动,并让学生用英语简单进行介绍。辨别网络的好与坏,理智上网。
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】
Show some pictures about different lives in different places.Then discuss the following questions:
T:Hello,boys and girls.How do you know about the world?
S1:From books.
S2:My parents told me.
T:What else?
S3:Internet.
S4:TV.
T:What do you think of the Internet?
S5:Interesting.
S6:Bad for eyes.
Discuss the questions in groups.Ask the students to talk for three minutes.Then let them present their talk in class.
[设计意图]　利用学生学过的内容,从询问网络开始,轻松进入语境,进而介绍生词,图片的使用使学习更加形象直观,自然地进入谈论互联网的新话题。
Leading in 【情景2】
Greet the class.
T:Hello! Boys and girls!
Ss:Hello! Mr./Ms.XX.
Ask the students to introduce their own experiences about the Internet in class.
S1:I played games on it.
S2:I can look for all kinds of information.
S3:I did my homework on it.
Show the new word “Internet” and show the picture of the Internet to the students.
T:What do you think of it?
S4:It’s useful.
S5:It’s fun and popular.
S6:But it’s bad for your eyes and your back.
…
[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 one by one.
(1)Why are some parents worried about their kids using the Internet?
(2)And if a friend lives far away,the Internet makes it easy to stay in touch.
(3)Some of the disadvantages can become real problems if we don’t take care.
(4)How far do you want to go?
(5)The Internet can be a useful tool,but don’t let it take up all of your time.
Please pay attention to the long words:Internet,disadvantage.
[设计意图]　小组合作训练阅读,利用多媒体,展示一些网络的作用的图片,创设情景,使同学们身临其境,激发说的欲望。在练习中巩固本课需要懂的的句型。
StepⅢ.Listening
T:Listen to the tape with your book closed and fill in the blanks.
1.With the Internet,people can connect and share 　　　　in seconds.?
2.If a friend lives far away,the Internet makes it 　　　　to stay in touch.?
3.We can’t let the Internet take up all of our 　　　　.?
【Keys】　1.information　2.easy　3.time
[设计意图]　加深同学们对课文对话的懂的,学生们带着问题有目的地倾听,容易把握内容完成填空。
StepⅣ.Post-listening Activities
After listening to the passage,get the class to read it aloud.
Ss read aloud.Then practice the passage.Focus on the stressed words,pronunciation and intonation.
[设计意图]　学生训练听力之后,朗读巩固,训练学生的语音语调;再模仿对话,编出自己的对话,培养学生运用目标语言进行交际的能力。
StepⅤ.Reading
1.Read the text and decide whether the statements are true or false.
(1)The Internet has advantages and disadvantages. (　　)
(2)Some people attack the web or use the Internet to steal others’ information. (　　)
(3)We should use the Internet carefully and properly. (　　)
2.Then ask some volunteers to read the passage.
3.Read the text again and fill in the blanks.
(1)It 　　　　the world to us.?
(2)And if a friend lives far away, the Internet makes it easy to　　　　.?
(3)People are able to　　　　 and share information in seconds.?
(4)In many ways, it makes life 　　　　.?
(5)Spending too much time online is 　　　　people’s health.?
(6)The Internet can be a useful tool, but don’t let it 　　　　your time.?
【Keys】　1.(1)T　(2)T　(3)T　3.(1)opens up　(2)stay in touch　(3)connect　(4)easier and simpler　 (5)harmful to　(6)take up all of
☆教材解读☆
1.Why are some parents worried about their kids using the Internet??
be worried about sb/sth意思是“担心某人或者某事”,worried是形容词,意思是“焦虑的,担忧的”。
She is worried about her parents.
她担心她的父母。
【拓展】　(1)“be worried + that 从句” 意思是“担心……”。
He is worried that he can’t go to school.
他担心不能去上学。
(2)worry about sb/sth意思是“担心某人/某事”。worry 是动词,意思是“担心,担忧” 。
Don’t worry about us.We have finished work.不要担心我们。我们已经完成工作。
(3)worry作动词时,一般用于口语,常常构成短语“don’t worry”,意思是“不要担心”。
Don’t worry.Everything will be OK.
不要担心。一切都会好的。
2.And if a friend lives far away,the Internet makes it easy to stay in touch.?
句中far away意思是“遥远”,指的是距离较远,在句中作状语或者表语。
They are far away in France.
他们远在法国。
【拓展】　far away后面可接from,构成far away from…结构,意思是“距离……很远”。
We told the students to be far away from the river.我们告诉过学生远离河流。
3.Some of the disadvantages can become real problems if we don’t take care.?
◆problem 是一个可数名词,意思是“问题,难题”,也可以表达抽象意义。
Can you solve these problems?
你能解决这些问题吗?
【辨析】　problem,question
(1)problem 一般指的是难以解决的问题,常和solve 或者work out 连用,有时还可以表示数学或者物理习题。
He worked out the physics problem at last.最终,他做出了这道物理题。
(2)question一般指的是需要寻找答案的问题,常和ask或者answer连用。
She answered the questions easily.
她轻松地回答了问题。
　　◆句中take care的意思是“小心”,可以单独用,也可以构成词组:take care to do sth 做某事的时候要小心。
Take care to climb the mountains.It’s dangerous.爬山的时候要小心。这个有危险。
【拓展】　(1)take care that…小心……。
Take care that she can’t swim.
小心点,她不会游泳。
(2)take care用在口语中,表示“保重”,用于关系比较好的人们之间。
Take care,Grandma! 保重,祖母!
4.The Internet can be a useful tool,but don’t let it take up all of your time.?
句中take up 意思是“占据(空间);占用(时间)”。
Playing the games takes up children much time.玩游戏占用了孩子的许多时间。
The big bed took up much space in my room.我房间的大床占据了很大空间。
【拓展】　take up的其他含义:
(1)将……改短。
This desk needs taking up.
这张桌子需要改短。
(2)学着做。
I have taken up France.我学了法语。
(3)开始从事。
He took up his duties last year.
他去年就开始履行他的职责。
(4)进入。
She took up the best seat.
她占了个最好的座位。
(5)接受。
They took up the gifts that we gave.
他们接受了我们的礼物。
(6)继续。
The old man took up the story.
老人继续讲故事。
5.How far do you want to go? ?
how far意思是“多远”,一般用来询问路程或者距离,它的答语一般用时间或者距离表达。
—How far is it from your home to school?
从你家到学校有多远?
　　—It’s about 5 miles away./It’s about 10 minutes’ walk.大约5英里。/步行大约10分钟。
【拓展】　(1)how long多久/多长,询问时间/长度。
How long do you sleep every day?
每天你睡多久?
How long is the bed?床有多长?
(2)how often多久一次,询问动作频率。
How often do you watch TV?
你多久看一次电视?
(3)how soon多快,询问将来时间。
How soon will you come back?
多久你会回来?
[设计意图]　学生通过阅读课文,掌握重点内容,并且通过判断正误来巩固对课文的理解和懂的;朗读课文并填空,掌握课文重点句式。
StepⅥ.Complete Let’s Do It!
Ask the students to read the passage again and fill in the table in No.1,then listen to the tape carefully and tick the correct answers in No.2.
[设计意图]　Let’s Do It! 部分中的No.1重点是阅读教学,以习题的形式,既巩固了课文,又训练了做题能力;No.2利用听力的方式,考查学生对课文的懂的。
StepⅦ.Task
GROUP WORK:Let’s Do It! No.3
Ask some students to come to the front of the classroom in groups and finish No.3.
[设计意图]　No.3的重点是口语表达训练,同学们通过小组合作来完成。以谈论网络的作用为话题,课文已经给出了一些句子,提供了一个语境完整、内容丰富的话题,自然呈现本单元的核心句型,为学生进一步懂的课文做了巩固。小组合作的形式,训练学生的合作意识,小组之间的竞争,激发学生的积极性。
Step Ⅷ.Exercises
T:Now,look at the sentences with some missing words.Please use proper words to fill them.
1.He　　　　(担心) his old father.?
2.She is　　　　(遥远) in Africa.?
3.I can help you solve the　　　　(问题).?
4.　　　　(多远) is it from here to the shop??
5.The Internet can be a 　　　　(有用的) tool.?
【Keys】　1.is worried about　2.far away　3.problem　4.How far　5.useful
[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,利用已知的信息,让学生补充,让他们得到充分的训练。
StepⅨ.Homework
1.Practice the passage with your group members after class.
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 23　The Internet—Good or Bad?
advantage,simple,coin,cause,less,steal
be worried about,in seconds,far away,aside from,take up
It opens up the world to us.
And if a friend lives far away,the Internet makes it easy to stay in touch.
It may even cause them to be less social with family and friends.
People are able to connect and share information in seconds.
In many ways it makes life easier and simpler.
Spending too much time online is harmful to people’s health.
The Internet can be a useful tool,but don’t let it take up all of your time.
教材习题答案
【Lesson 23】
1
Good things about the Internet
Bad things about the Internet
People are able to connect and share information in seconds.
It helps us get things done more quickly.
Spending too much time online is harmful to people’s health.
Some people attack the web or use the Internet to steal others’ personal information,even banking information.