仁爱版英语九年级上册Unit 1 Topic 2 The population in developing countries is growing faster 教案.docx
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仁爱版英语九年级上册Unit 1 Topic 2 The population in developing countries is growing faster 教案.docx
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仁爱版英语九年级上册Unit1Topic2Thepopulationindevelopingcountriesisgrowingfaster教案
Unit2SavingtheEarthTopic2Alltheseproblemsareveryserious.
SectionA
【教学重难点】
Themainactivitiesare1aand3a.本课重点活动是1a和3a。
【教学目标】
1.Learnanewword:
increase
2.Learnsomeusefulsentences:
(1)Itsaystheworldhasapopulationof6.5billion.
(2)Itisincreasingby80millioneveryyear.
(3)Whichcountryhasthelargestpopulation?
(4)—What’sthepopulationoftheU.S.A.?
—It’s…
(5)Soitis.
(6)Thepopulationproblemismoreseriousindevelopingcountries.
3.Goonlearningthepresentperfecttense.
Chinahasalreadycarriedouttheone-childpolicytocontrolthepopulation.
4.Goonlearningthenumberswithmillionandbillion.
5.Makestudentsrealizetheseriouspopulationproblem.
【教学准备】
卡片、录音机、世界人口示意图、小黑板
【教学过程】
Step1preparing
复习现在完成时,然后引导学生谈论过去人们生活条件差的原因,引出人口问题,导入新课。
1.(小竞赛。
教师把学生分为两组。
然后出示写有already,yet,ever,never,just的卡片,要求学生以抢答形式迅速说出含有卡片上词的句子,要求用现在完成时。
迅速且正确者赢一分,评出获胜组。
)
T:
Let’shaveacontesttoreviewthepresentperfecttense,OK?
Ss:
Great.
T:
First,I’lldividethewholeclassintotwogroups.ThenI’llshowthecardswith“already”,“yet”,“ever”,“never”and“just”onebyone.Yourteamwillgetascoreifyougivemeacorrectsentencewiththewordonthecard.Let’sgo!
(教师出示写有already的卡片。
)
T:
“Already”,please!
Group1:
Shehasalreadyfinishedherhomework.
T:
Congratulations.“Yet”,please!
Group1:
Ihaven’twateredtheflowersyet.
T:
Congratulations.Group2.“Ever”,please!
Group2:
HasyoursistereverbeentoTibet?
…
2.(教师让一名学生复述SectionA中3a的内容,引出人口问题。
)
T:
Whocanretell3ainSectionA?
S1:
Ican.
(学生复述课文。
)
T:
Welldone.Canyoutellmewhytheirlivingconditionsdidn’tseemtobeverygoodinthepast,S1-?
S1:
Becausethefamilymembersinthepastweremorethanthosenowadays.
S2:
Becauseofthebigpopulation.
S3:
Chinawasnotwelldeveloped.
T:
Right.Butwhat’sthepopulationofChina,doyouknow?
Let’slearnaboutitfrom1ainSectionB.
Step2Presentation
用多媒体呈现图表,谈论中国及世界人口,呈现1a中重点句型及部分生词。
1.(多媒体展示1b中图表。
)
T:
Hereisachartaboutsomecountries’population.LookatChina.What’sthepopulationofourcountry?
Ss:
It’s1.3billion.(可帮助学生回答。
)
(板书句型并要求学生掌握;理解billion。
)
—What’sthepopulationofChina?
—It’s1.3billion.
T:
IsChinaadevelopingcountryoradevelopedcountry?
Ss:
Adevelopingcountry.
(板书并讲解。
)
thedeveloping/developedcountry
T:
Good.Nowpleasetalkaboutothercountries’populationinpairs.
(教师可先做示范,然后让学生进行练习。
)
S1:
What’sthepopulationof…?
S2:
It’s…
S1:
Isitadevelopingcountryoradevelopedcountry?
S2:
It’sa…
T:
Welldone.Wehaveknownsomecountries’population.What’sthepopulationoftheworld?
S3:
6.5billion.
T:
Right.Theworldhasapopulationof6.5billion.Andtheworld’spopulationisincreasingby80millioneveryyear.
(板书单词increase及短语hasapopulationof,并要求学生掌握,延伸讲解increaseby和increaseto的区别。
)
hasapopulationof
increase
increaseby
increaseto
T:
Lookatthechart,whichcountrieshavethelargerpopulation,thedevelopingcountriesorthedevelopedcountries?
Ss:
Thedevelopingcountries.Andthepopulationindevelopingcountriesisgrowingfaster.
T:
Soitis.
(板书Soitis,讲解“so+代词/名词+助动词/be动词/情态动词”结构,并和“so+助动词/be动词/情态动词+代词/名词”的结构进行区分。
)
Soitis.
T:
Inordertosolvethepopulationproblem,whatpolicydoesChinacarryout?
Ss:
One-childpolicy.
T:
Yes.Nowlet’slistento1aandlearnmoreaboutit.
2.(教师放1a录音,让学生听并尽可能地写出对话中的有关数字。
)
T:
Closeyourbooks,listentothetapeandtryyourbesttowritedownthenumbersyouhear.
(教师再放录音,让学生核对写的情况。
)
T:
Openyourbooks.Listenagainandcheckwhatyouhavewritten.
(让学生朗读1a,师生共同解决疑难点。
)
T:
Read1aandpayattentiontothefollowingsentences.
(教师板书并讲解这三个句子,使学生加深对文章的理解。
)
(1)Anditisincreasingby80millioneveryyear.
(2)Itshowsthatthepopulationindevelopingcountriesislargerthanthatindeveloped
countries,doesn’tit?
(3)Chinahasalreadycarriedouttheone-childpolicytocontrolthepopulation.
Step3Consolidation
根据1b绘制表格(教师可适当增加一些其他国家的人口),学生通过对话及复述,巩固1a内容。
1.(让学生完成表格并进行链式问答。
)
T:
Lookattheform.Thenfillitout.
Country
China
India
theU.S.A.
Indonesia
Brazil
Population
(核对答案。
)
T:
Great.Ithinkyoualldidwell.
(学生两人一组进行问答练习。
)
S1:
What’sthepopulationofChina?
S2:
It’sabout1.3billion.What’sthepopulationofIndia?
S1:
Itisabout1.1billion.WhatabouttheU.S.A.
S2:
2.(让学生试着复述1a内容。
)
S3:
Theworldhasapopulationof6.5billion.
S4:
Chinahasthelargestpopulation,with1.3billion.
S5:
Thepopulationindevelopingcountriesisgrowingfaster.
…
T:
OK.Ithinkyouhavemasteredthedialog.Youcanpracticeitbyyourselvesafterclass.
Step4Practice
通过复习千以内的数字,引出高位数字的读法,完成2a,2b。
1.(教师出示写有数字的小黑板。
)
T:
Wehavelearntaboutmanycountries’population.Doyouknowhowtoexpresslargenumbers?
Firstlet’slookattheblackboard.
(板书)
2183065366
(教师由以前学的百、千引入百万、十亿。
)
S1:
Twohundredandeighteen.
S2:
Threehundredandsix.
S3:
Fivethousand,threehundredandsixty-six.
(教师总结数字的读法,指出易出错的地方并要求学生注意。
)
T:
Now,lookatthesenumbers.Canyoureadthesenumbers?
(板书)
73654787360627198764501
(教师先讲解三位一划分原则,再让学生运用。
给学生准备时间,然后提问。
)
S4:
736547sevenhundredandthirty-sixthousand,fivehundredandforty-seven.
(让较好的学生总结数字的读法。
教师强调and,-,thousand放的位置,以及注意此处量词不加“s”。
)
T:
Now,Iwillaskotherstudentstoreadthenumbers.
S5:
8736062eightmillion,sevenhundredandthirty-sixthousandandsixty-two.
S6:
7198764501sevenbillion,onehundredandninety-eightmillion,sevenhundredandsixty-fourthousand,fivehundredandone.
T:
Youaregreat.Mostofyouhavemasteredhowtoreadthenumbers.Pleaselookatthenumbersin2a.Readthemtogether.
2.(做游戏,巩固数字的读法。
)
T:
Let’splayanumbergame.Iwillshowyousomenumbers.Readthemquicklyandcorrectlyingroups.
(每个小组各选派三位学生,由教师统计分数,构建评分机制,激发学生兴趣。
(板书)
739850040600000017602018000676302320
(教师在黑板上画出计分表。
)
G1
G2
G3
G4
3.T:
Lookatthepicturesof2banddescribethem.
(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,复习高位数字的读法并把新旧知识结合起来。
)
T:
Yeah,verygood.Nowlet’slistentothetapeof2bandnumberthepicturesyouhearandwritedownyouranswers.Afterthat,let’schecktheanswers.
S7:
PictureFThejacketcosts¥326.00.
S8:
PictureBIt’sabout6575milesfromBeijingtoToronto.
S9:
PictureAthemountainis8844.43metershigh.
S10:
PictureEthepopulationofChinawas1.3billionin2007.
S11:
PictureDIthinkthepopulationofCanadawasabout33millionin2007.
S12:
PictureCthedinosaurlived210millionyearsago.
Step5Project
让学生讨论中国现在和将来的人口状况及可能出现的问题,巩固高位数表达法,并根据讨论内容写一篇报告,为下一节课做准备。
1.T:
ThepopulationproblemisthebiggestoneinChina.Nowlet’sdiscussthequestion:
What
aretheproblemsofChina’spopulation?
(学生小组讨论。
)
T:
Whocantalkaboutthem?
(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:
Thepopulationisstillincreasing.
S2:
Thepeopleinthecountrysidecan’tobeytheone-childpolicy.
S3:
Therearemoreandmoreoldpeopleinsomebigcities.
T:
Verygood.ButwhatdoyouthinkofthefutureofChina’spopulation?
Pleasediscussit.
(鼓励学生表达自己的观点。
)
S4:
ThepopulationofChinawillbeabout1.5billionin2050.
S5:
MaybeChinawillhaveapopulationofabout1.7billionin2050.
S6:
MaybethepopulationofChinawillbecomesmallerthanbeforewiththehelpofthe
One-childpolicy.
(学生可能做出种种猜测。
)
2.Homework:
WriteareportaboutthepopulationofChinainthefuture.
【板书设计】
Chinahasthelargestpopulation.
SectionB
have/hasapopulationofItsaystheworldhasapopulationof6.5billion.
increaseby—What’sthepopulationoftheU.S.A.?
thedeveloped/developingcountry—296million.
Soitis.
SectionC
【教学重难点】
Themainactivityis1a.本课重点活动是1a。
【教学目标】
1.Learnsomenewwordsandphrases:
difficulty,beshortof,sofar,takemeasurestodosth.,percent
2.Learnsomeusefulsentences:
(1)…andaboutonefifthofthepeopleintheworldliveinChina.
(2)…ourgovernmenthastakenmanymeasurestocontrolthepopulation.
(3)Thankstothepolicy,Chinaisdevelopingquicklyandpeople’slivingconditionsareimprovingrapidly.
3.Talkabouttheproblemsthelargepopulationcauses:
(1)It’sdifficultforlotsofpeopletofindjobs.
(2)…,weareshortofenergyandwater.
(3)Mostcitiesaremorecrowdedthanbefore,andthetrafficismuchheavier.
4.Getstudentstoknowhowserioustheworld’spopulationproblemis.
【教学过程】
Step1Review
教师出示一些数字和图表,复习高位数表达法,导入新课。
1.(用添加数字的方法复习高位数字,使学生由浅入深地掌握知识。
操作方法:
教师首先在黑板上写出一个两位数,然后逐次在前面加上一个数字,被提问的学生由基础较差的向基础较好的依次递进。
)
T:
I’llwritenumberslikethis“888888888…8888888888”.Saythesenumbersasquicklyasyoucan,clear?
Ss:
Yes.
T:
88.
S1:
Eighty-eight.
T:
888.
S2:
Eighthundredandeighty-eight.
T:
8888.
S3:
Eightthousand,eighthundredandeighty-eight.
…
T:
8888888888.
S4:
Eightbillion,eighthundredandeighty-eightmillion,eighthundredandeighty-eightthousand,eighthundredandeighty-eight.
2.(通过多媒体展示世界各国人口图表,复习SectionB中重要句型。
)
T:
Youhavemasteredhowtosaythesenumbers.Nowlookatthechartandreviewwhatwe’velearnedinSectionB.What’sthepopulationoftheworld
Ss:
Itissaidthattheworldhasapopulationof6.5billion.
T:
Whichcountryhasthelargestpopulation?
Ss:
Chinahasthelargestpopulation,with1.3billion.
T:
Istheworld’spopulationincreasingnow?
Ss:
Yes,theworld’spopulationisincreasingby80millioneveryyear.
T:
Itisreallyoneofthegreatestproblemstoday.Ithinkweshoulddosomethingtosolvethisproblem.
Ss:
Yes.
Step2Presentation
通过图片,创设语言情景,呈现部
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