南靖三中2013/2014学年九年级上册英语公开课教案
2013-9-26李永安
Unit1Topic2Whichcountryhasthelargestpopulation?
Sectionc
Themainactivityis1a.本课重点活动是1a。
Ⅰ.Teachingaimsanddemands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.
Ⅱ.Teachingaids教具
多媒体/图片/小黑板/录音机
Ⅲ.Five-fingerTeachingPlan五指教学方案
Step1Review第一步复习(时间:8分钟)
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’llwritenumberslikethese“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: Itissaidthattheworldhasapopulationof6.8billion.
T: Whichcountryhasthelargestpopulation?
Ss: Chinahasthelargestpopulation,with1.3billion.
T: Istheworld’spopulationincreasingnow?
Ss: Yes,theworld’spopulationisincreasingby80millioneveryyear.
T: Itisreallyoneofthebiggestproblemstoday.Ithinkweshoulddosomethingtosolvethisproblem.
Ss: Yes.
Step2Presentation第二步呈现(时间:10分钟)
通过图片，创设语言情景，呈现部分生词、词组及分数的表达法。
1.(教师展示人才市场的图片和事先准备好的小黑板，引出1a。)
T:Boysandgirls,wehaveknowntheworldhasalargepopulation.Now,lookatthepictureandthestatementsaboutpopulation:
（出示小黑板。）
(1)Everyminuteabout261babiesarebornintheworld.
(2)Theworld’spopulationisgrowingfasterandfaster.
(3)Chinahasthelargestpopulationintheworld.
(4)China’spopulationhasreachedonefifthoftheworld’spopulation. T: Whatdoyouthinkofthepictureandthestatements,boysandgirls?
Ss: That’sterrible!
T: Yes.Thegrowingpopulationwillcausemanydifficulties.Itwillinfluencethedevelopmentoftheworld’seconomy.Sofar,somefamiliesstillcan’toffertheirchildrenagoodeducation.
(板书单词difficulty，词组sofar，要求学生掌握。)
difficult(adj.)—difficulty(n.)—difficulties(n.pl.)
sofar T: Doyouwanttoknowotherproblemscausedbythelargepopulation?
Ss: Sure.
T: Weareshortofenergyandwater.NowChina’spopulationisonefifthoftheworld’spopulation.Itmeansitis20percentoftheworld’spopulation,soChinahastakensomemeasurestosolvetheproblem.Doyouknowwhattheyare?
(板书onefifth，详解并要求学生掌握分数表示法；掌握单词percent，词组beshortof,takemeasurestodosth.。)
beshortof
onefifth
percent
takemeasurestodosth. Ss: Oneisknownastheone-childpolicy.IthasworkedwellincontrollingChina’spopulation.
T:Thankstothepolicy,Chinaisdevelopingquicklyandpeople’slivingconditionsareimprovingrapidly.
(让学生读1a，然后回答1a中的两个问题，完成1a。)
Step3Consolidation第三步巩固(时间:10分钟)
利用关键词复述1a，并独立完成1b，进一步了解中国所面临的人口问题。
1.(让学生自读1a并独立完成1b，然后核对答案。)
T:Let’slookat1b.DescribethedisadvantagesofChina’slargepopulationaccordingto1aandwritethemdown.Youhavetwominutes.
(两分钟后，教师核对答案。)
T: NowIwillaskseveralstudentstowritetheiranswersontheblackboard.
S1: Lessspacetolivein.
S2: Difficulttofindjobsforlotsofpeople.
S3: Shortofenergyandwater.
S4: Mostcitiesaremorecrowded.
S5: Thetrafficisheavier.
S6: Therewillbemuchmorepollution.
S7: …
T: Youranswersarewonderful.
2.(学生阅读1a的同时,教师把关键词列在小黑板上。)
T:Boysandgirls,pleaseread1aagainandthenretellitaccordingtothekeywordsonthesmallblackboard.
(教师出示小黑板。)
6.8million3billionhalfonefifth
causedifficultiestakemeasuresto
workwellinlivingconditionsserious
alongway (首先，教师根据小黑板上的关键词复述1a作示范，然后让两位同学复述。当学生表达错误时,教师给予纠正。当学生表达不出时,教师或其他同学给予帮助，提高学生口语复述能力。)
Step4Practice第四步练习(时间:10分钟)
播放2a录音，完成2b。进一步了解世界和中国人口状况，强化练习现在完成时的用法。
1.(教师拿出一张”地球上站满人”的图片或将图片展示在多媒体上。让学生仔细观察,然后播放2a录音。)
T:Now,lookatthepicture.Theearthisfullofpeople.Everyminuteabout261babiesarebornintheworld.Thatmeanspeoplehavetofindfoodforabout375840newbornbabieseveryday.Thepopulationproblemisserious.Pleaselistentothetapeandcompletethearticlein2a.
(板书并要求学生了解。)
newborn T:Now,lookatthetextbyyourselves.Let’slistentothetapeagainandchecktheanswers.
(让学生核对完后,一起齐读短文。)
T:Youhaveunderstoodthetext.Let’sdotheexercisesin2b.Thenwewillchecktheanswers.
(给学生一分钟,理解2b中的五个句子,让一位学生回答。)
2.(用现在完成时和重点词组造句，复习含有just,ever,already,yet等词的现在完成时的用法。)
T: Makesomesentencesusingthepresentperfecttensewith“just”,“ever”,“already”,“yet”andsoon.
Step5Project第五步综合探究活动(时间:7分钟)
完成3，让学生讨论中国人口现状，尽量运用现在完成时和高位数的表达法。学生给笔友
写一封信，然后根据表格内容写一份有关世界不同城市生活状况的调查报告。
1.(让学生写一封信给他/她的笔友,谈谈他/她对中国人口问题的看法。写的好的，可以读一小段给同学听。教师说明写信时必须注意的事项。)
T:Youhaveknownsomuchaboutthepopulation.Now,writealettertoyourpenpalaboutthepopulationprobleminChina.Thequestionsin3mayhelpyou,thenIwillasksomestudentstoshowtheiropinions.
2.Homework:
Makeasurveyandcompletethechart,thenwriteasurveyreport.YoucansearchforinformationontheInternet.
City Population Road Livingcondition Beijing Tokyo Toronto NewYork Yourcity 板书设计：
Whichcountryhasthelargestpopulation?
SectionC
beshortof onefifth
sofar difficult(adj.)-difficulty(n.)-difficulties(n.pl.)
takemeasurestodosth. Thankstothepolicy,…
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