初三第2单元.docx
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初三第2单元
冀教版九年级下册Unit2教案（英文版）
Unit2DNA
Lesson9:
What’sa“Horkey”?
TeachingContent:
Masterywordsandexpressions:
helpful,atthesametime
Oralwordsandexpressions:
DNA,combine,juicy,mule,donkey
TeachingAims:
1.Knowmoreaboutcloning.
2.Howtocombinetwodifferentthings.
TeachingImportantPoints:
1.Talkabouttheabilityandinability.
2.Theuseofcoordinatingconjunctions.
3.Combinetwodifferentthings.
TeachingDifficultPoints:
Talkabouttheabilityandinability.TeachingPreparation:
pictures
TeachingAids:
flashcards,audiotape,picturesTypeoflesson:
newlesson
TeachingProcedure:
Step1.Leadintheclassbyshowingsomepicturesaboutcombiningtothestudents.Theymaybeaboutdifferentthings,suchasfood,fruit,animalsandotherthings.
Step2.Listentothetapeandanswerthefollowingquestions:
1.CanDannycombineadonutandapizza?
2.Whowantstocombineacowandachick?
Letthestudentsanswerthequestionswiththehelpofthepictures.Finishthetaskinoralinclass.
Step3.Readthetextandfillintheblankswiththecorrectwords.
1.Wecancombinetwodifferent______ortwodifferent______.
2.Brianwouldcombine______and______.
Lookthroughthewholetextquicklyandanswerthequestionsinclassinoral.
Step4.Encouragethestudentsfindthenewwordsinthislesson.Givemoreexamplesandletthestudentsunderstandmoreaboutthewords.
Iwouldcombineadonutandapizza.
ThenIcouldhavebreakfastandlunchtogether.
ThenIwouldhavelittle,juicybananas.
Doyouknowwhatamuleis?
Ithasahorseasmotherandadonkeyasafather.
Step5.Readthetextagainandencouragethemtofindmorequestionsaboutthetext.Onestudentstandsupandasksaquestion.Theotherswhowanttoanswercanstandupandansweritasquicklyashecan.Forexample:
1.Whatwouldyoucombine?
2.Whataboutcombiningaduckandadeer?
3.Canwecombineapplesandbananas?
Step6.Cometo“PROJECT”.
Finishthetaskingroupsofthreeorfourstudents.
Thinkaboutsomethingthatiscombinedbytwodifferentthings.Eachofthegroupwriteshisanswerdownandshowsittoothers.Thenchoosethemostmeaningfulonetostudy.
Whatwillyourgroupcombine?
Whatifyoucombinethetwothings?
Whatcanitdoforus?
What’sitsadvantage?
Talkaboutthequestionsabove,thensumtheirideas.
Giveareportinfrontoftheclass.Demonstrateyourideas.Describethethingthatyoucombineindetail.Describeitsadvantagesanddisadvantages.
Step7.Homework
1.Finishofftheexercisesinactivitybook.
2.Goonthenextreadinginthestudentbook.
Summary
Inthislesson,welearntocombinetwodifferentthingstogether.Inordertogetnewlivingthings,wemustmakefulluseofourimagination.Whatcanthethingsthatwecombineareusedfor?
Itisimportantforustodiscuss.Duringthediscussion,wepracticeourspokenEnglish.
Lesson10:
WhatisDNA?
TeachingContent:
Masterywordsandexpressions:
generally,twin,clone,notonly…butalso
Oralwordsandexpressions:
blueprint,identical,egg,identify
TeachingAims:
1.Knowhowtowriteapassageonscience.
2.LearnsomethingaboutDNA.
3.Knowmoreaboutourbody.
TeachingImportantPoint:
1.Masterthewordsandexpressionsofthislesson.
2.Theabilityandinability.
3.Theuseofcoordinatingconjunctions.
TeachingDifficultPoint:
TheuseofDNA.
TeachingPreparation:
pictures
TeachingAids:
flashcards,audiotape,pictures
Typeoflesson:
newlesson
TeachingProcedure:
Step1.LeadinthetextbydiscussingwhatDNAis.Dividetheclassintoseveralgroups.Thentalkaboutthesubjectforseveralminutes.Thenoneofthegroupspresentstheiropinionsinfrontoftheclass.
Step2.Listeningtask:
Listentothetapeandfillintheblankswiththecorrectwordsyouhear.
1.Generallyspeaking,a______isadrawing.
2.______foridenticaltwins,eachlivingthinghasitsownuniqueDNA.
Playthetapeonce.Thenletthestudentstrytofinishthetaskinclassinoral.
Step3.Readingtask:
Readthetextquicklyandanswerthefollowingquestions:
1.WheredoesyourDNAcomefrom?
2.IsyourDNAineverypartofyourbody?
Finishthereadingtaskinclassinoral.Trytogetmoreinformationaboutthetextatthesametime.
Step4.Readthetextagain.Findthesentenceswiththenewwords.Trytocreatesituationaboutthenewwords.Thenmakesentenceswiththenewwords.Ifsomeonecanmakeawholestorywiththenewwordsthatwelearninthislesson,theteachermustencourageher.
Thesentenceswiththenewwords:
Generallyspeaking,ablueprintisadrawing.
Identicaltwinsaretwochildrenthatgrewfromthesameegg.
Theyareclones.
FromyourDNA,scientistscanidentifynotonlyyou,butalsopeoplerelatedtoyou.
Step5.Letsomestudentstellsomedetailsaboutthetext.
WhatisDNA?
WhereisyourDNAfrom?
WhatisDNAusedfor?
Step6.Cometo“LET’SDOIT”.
Finishthetaskwithapartner.Findthethingsaboutyouthatshowyourparents’DNA.Talkaboutifforawhile.Thenletsomevolunteerscometothefronttotalkaboutthesubject.
Step7.Homework
1.Finishofftheexercisesintheactivitybook.
2.Goonthenextreadinginthestudentbook.
Summary:
Youlooklikeyourfatheroryourmother.ThatidentifiestheDNAofyourbodyfromyourparents.DNAisveryfascinating.EachlivingthinghasitsownuniqueDNA.TrytofindmorewaystousetheDNAinmanyfields.DiscusstheuseofDNAinthisclass.Makefulluseofittohelpmorepeopleintheworldinmorefields.
Lesson11:
CloningPeople?
TeachingContent:
Masterywordsandexpressions:
exactly,divide,crazy
Oralwordsandexpressions:
humanbeing,original,adult,Dolly,insect
TeachingAims:
1.Knowmoreaboutcloning.
2.Createthestudents’spiritofcooperation.
TeachingImportantPoints:
1.Theadvantagesanddisadvantagesofcloning.
2.Theexpressionofabilityanddisability.
3.Theuseofcoordinatingconjunctions.
TeachingDifficultPoints:
Theadvantagesanddisadvantagesofcloning.
TeachingPreparation:
pictures
TeachingAids:
flashcards,audiotape,pictures
Typeoflesson:
newlesson
TeachingProcedure:
Step1:
ShowapictureofDolly.Thenletthestudentsdiscusswhatourlifewillbeifwemakeacloneofourselves.
Dividetheclassintogroupsofthreeorfour.Discussforfiveminutes.Thenpresenttheirresultstotheclass.
Step2.Listeningtask:
Listentothetapeandfillintheblankswiththecorrectwordsyouhear.
1.Theclonesarethe______height.
2.Thereare______waystoclonepeople.
Finishthetaskinclassinoral.
Step3.Readingtask:
Readthetextanddecidewhetherthefollowingstatementsaretrue（T）orfalse（F）.
1.Wecanmakeclonesfromdeadanimals.
2.Eachclonewouldbeadifferentperson.
3.WecancombinetheDNAofpigsanddogs.
Finishthetaskinclassinoral.
Step4.Pairwork:
Readthetextagainandfindmoredetailsaboutthetext.Trytosolvethefollowingproblems.Talkaboutthemwithyourpartner.Atthesametime,encouragethemtoaskmorequestionsaboutthetext.
Howmanywaysaretheretoclonepeople?
Whatarethey?
Doyouwantacloneofyourself?
Why?
Whatistheuseofcloning?
Trytofinishitinalimitedtimeinordertoimprovetheircomprehensionability.
Step5.Readthetextbythestudents.Givethestudentstimetolistentothetapeagain.Thenmakeachanceforthemtopracticeinfrontoftheclass.
Step6.Adebate
Dividetheclassintotwogroups.Onegroupisfortheadvantagesofcloning.Theotherisforthedisadvantagesofcloning.
Theteacherdesignsthetaskinordertofindoutthemeaningsofcloning.
Step7.Cometo“LET’SDOIT’.
Thistaskissimilartotheoneisstep6.Thistopicisaboutthefood.Thestudentscanusetheirimaginations.OfcoursethebestwayistosearchontheInternetformoreinformationaboutthesubject.
Step8.Homework
1.SearchmoreinformationaboutcloningontheInternetorinthenewspaper.
2.Finishofftheexercisesintheactivitybook.
Summary:
Cloningisapopularsubjectinthemodernsociety.Itisgoodforthestudentstoknowmoreaboutthat.EncouragethestudentstofindoutmoreinformationontheInternet.Theycanuseothertoolstogetmore.Givethemchancestopresenttheirresultsinthenextlesson.
Lesson12:
DidYouEverSeea“Chorse”?
TeachingContent:
Therearenonewwordsandexpressionsinthislesson.
TeachingAims:
1.Knowmoreaboutcombining.
2.FindthedifferencesbetweentheChineseandforeignsongs.
TeachingImportantPoints:
1.Theexpressionofabilityanddisability.
2.Theuseofcoordinatingconjunctions.
3.Singthesongfluently.
TeachingDifficultPoints:
Combinetwodifferentlivingthings.TeachingPreparation:
pictures
TeachingAids:
flashcards,audiotape,picturesTypeoflesson:
newlesson
TeachingProcedure:
Step1.Showsomepicturesofanimalstothestudents.Letthemimaginewhatanimalswhatanimalstheywouldliketocombine.
Whatwouldtheylooklike?
Whataretheyusedfor?
Dividetheclassintogroupsofthreeorfour.Thendiscussthequestionsforfiveminutes.Afterawhile,showtheirresultstotheclassinfrontoftheclass.
Step2.Listentothesongandrepeatafterit.Playthetapeforseveraltimes.Letthestudentstobefamiliartotherhythmofthesong.
Step3.Readthesongasalyric.Thenletthestudentsmakeupothersimilarsongsaccordingtotheirimagination.
Letsomevolunteerspresenttheirsongtotheclass.
Step4.Letthestudentstrytosingthesongtogether.Playthetapeagain.Askthemtosingafteritforseveraltimesagain.
Step5.Asksomevolunteerstosinginfrontoftheclass.
Step6.Cometo“LET’SDOIT”.
Workinasmallgroup
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