Unit4MainIdea設計說明理論指導：英語閱讀教學中教師不僅要讓學生學會語言知識，獲取文章提供的信息，領悟文章的內涵，更重要的是要讓學生在學習過程中掌握良好的閱讀方法和閱讀技能，學會學習，成為有獨立閱讀能力的人。應用指導：Part1:教師引導學生理解Whatisamainidea?并通過精選“短文+訓練”幫助學生掌握找出細節信息的能力。Part2:配套《閱讀微技能導練,共8篇短文,每篇短文設有分層訓練，強化訓練學生“細節理解”能力。Part3:“以讀促寫”WritingRoun-up環節，通過寫作訓練再次鞏固學生讀、寫過程中以“細節信息”支撐觀點的能力。Oneofthekeystolearningtoreadwellisbeingabletodifferentiatebetweenthemainpointofareadingselectionandthesupportingdetails.Unit4willhelpyourchildlearntorecognizethemainideaofastory.導學目標WhatIsaMainledea?Themainideaofaparagraphtellswhattheparagraphisabout.Theothersentencesadddetailstothemainidea.Themainideasentenceisoftenthefirstorlastsentenceintheparagraph.Butthemainideasentencecanbefoundinthemiddleoftheparagraphtoo.Thefollowingexamplemayhelpyouthinkaboutmainideas:4+6+5=15detail+detail+detail=mainideaThenumbers4,6,and5arelikedetails.Theyaresmallerthantheirsum,15.The15,likeamainidea,isbigger.Itismadeofseveralsmallerparts.HowtoReadaMainldeaReadthisstoryandunderlinethemainideasentence.TryitBarbaraJordanisanadmiredpublicfigureinAmericanhistory.ShewasthefirstAfricanAmericanwomanfromtheSouthtoserveinCongress.ShegrewupinTexas.Herparentstaughthertoworkhard.Jordanbecamealawyerandthenenteredpolitics.Shetriedtomakefairlawsforeveryone.ThemainideasentenceisthefirstsentenceinthisstoryaboutBarbaraJordan.Alltheothersentencesaredetails.Themainideacouldcomeattheendoftheparagraph:BarbaraJordanwasthefirstAfricanAmericanwomanfromtheSouthtoserveinCongress.ShegrewupinTexas.Herparentstaughthertoworkhard.Shebecamealawyerandthenenteredpolitics.Shetriedtomakefairlawsforeveryone.JordanisanadmiredpublicfigureinAmericanhistory.PracticeFindingtheMainldeaThisunitasksyoutofindthemainidcaofparagraphs.Forinstance,readtheparagraphandthequestionbelow.You'veheardofafullmoonandanewmoon,buthaveyouheardofabluemoon?Onceinawhile,therearetwofullmoonsinonemonth.Wecallthesecondmoonabluemoon.Abluemoonappearsaboutevery32months.Soifsomethinghappensonceinabluemoon,itdoesn'thappenoften.______1.TheparagraphmainlytellsA.whytheMoonlooksfullB.howtheMioonmovesC.whatabluemoonisD.aboutthedifferentcolorsoftheMoonThecorrectanswerisC."You"veheardofafullmoonandanewmoon,buthaveyouheardofabluemoon?"isthemainideasentence.Theparagraphisaboutblucmoons.CSometimesastorydoesnothaveamainideasentence.Youmustreadthedetailsintheparagraph.Readthefollowingstory.Trytoputthedetailstogetherandfindthemainidea.Writetheletterofyouranswerintheblank.Whenlioncubsareborn,theyhavethick,brown,spottedfur.Asmanyassixcubsarebornatonefime.Themotherlionhideshercubs.Shewantstokeepthemsafefromhyenosandleopards.Whenthecubsareonemonthold,theymeettheliongroup.______2.ThestorymainlytellsA.thenumberofcubsbornatonetimeB.howhycnasandleopardshuntC.howmuchcubsweighD.aboutthelivesoflioncubsThecorrectanswerisD.Theparagraphisaboutthelivesoflioncubs.Thenumberofcubsthatarebornisadetail.Theparagraphdoesn"treallytellhowhyenasandleopardshunt.Wecantellthattheyhuntlioncubsbecausethemotherlionwantstokecphercubssafefromthem.Theparagraphdocsnottellanythingabouttheweightofcubsatbirth.TrainingforReadingSkillsNow,

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howtofindthemainidea?Pleasepracticemore.（查看同單元下閱讀微技能導練）WritingRoundupReadeachparagraph.Thinkaboutthemainidca.Writethemainideainyourownwords.1.AfewrabbitswerethestartofabigprobleminAustralia.Theyweresetfree.Tenyearslatcrthereweremillionsofrabbits.Theywerealloverthecountry.Theywereeatingfarmcrops.Ittookawhiletofindwaystocontrolthem.Whatisthemainideaofthisparagraph?____________________________________________________AfewrabbitsweresetfreeandcausedabigprobleminAustralia.2.TomBradleywasthefirstAfricanAmericantobecomealicutenantontheLosAngelespoliceforce.HewasalsothefirstAfricanAmericanonthecitycouncil.HewasthefirstAfricanAmericanmayorinthecity.ThepeopleofLosAngeleslovedhim.Theykepthimasmayorforalmost20years.Whatisthemainideaofthisparagraph?_____________________________________________________________________TomBradleywasanAfricanAmericanmanwhodidalotforLosAngeles.3.IronEyesCodywasaNativeAmericanactor.In1971,atearchangedhislife.HeshedthetearinaTVadaboutkeepingAmericaclean.Theadbecameverypopular,andIronEyesbecamefamousforhistear.Hewasrememberedforitevenafterhisdeathin1999.Whatisthemainideaofthisparagraph?____________________________________________________ANativeAmericanactorbecamefamousbecauseofatea.PrewritingThinkofamainideathatyouwouldliketowriteabout,suchasaninterestingcou