高中英语教案Unit4AstronomythescienceofthestarsPeriod5Usinglanguage教案新人教版

Unit4Astronomy:thescienceofthestarsPeriod5Usinglanguage:Extensivereading整体设计教材解析Thisisthefifthteachingperiodofthisunit.Asusual,theteachershouldcheckstudents’homeworkandofferchancesforthemtogooverwhattheylearnedinthelastperiodatthebeginningoftheclass.Thenleadinthenewlesson.Inthisperiod,theteachingemphasiswillbeputondevelopingstudents’readingabilitybyreadingextensively.Wewilldealwithtwoparts:AVISITTOTHEMOONinUsinglanguageonPages30-31andCAUGHTBYABLACKHOLEinReadingTaskonPage66.Whilereading,getstudentslearningtousesomereadingstrategiessuchasskimming,scanning,andsoon.Astonewwordsandphrases,theteachercanfirstfindthosestudentsfeelmostdifficultandhelpthemtounderstand.That’senoughhere.ThereadingpassageAVISITTOTHEMOONisasciencefictionstorywhichimagineswhatitmightbelikeifanastronautvisitedthemoon.Thepurposeofsciencefictionwritingistocombinefactswithastorytomakestudentsinterestedandexcitedabouttravelinspace.Itisalsotostimulateaweandwonderintothevastnessofspace.Asthisreadingusestheinformationstudentshavegainedfromthelistening,theteachercanfirstasksomestudentstoretellthelisteningtexttoleadinthetopicandthenaskstudentstoreadthepassageanddosomecomprehendingexercises.Whilecheckingtheiranswerswiththewholeclass,dealwithlanguageproblemsstudentscan’tworkoutbythemselves.Thisisanextensivereadinglesson,sotheteachingstepsshouldbesimple.AstothepassageCAUGHTBYABLACKHOLE,itistocontinuetheabovestory.Theastronomersinthestoryvisitaplaceinspace,whichseemsimpossibleforpeopletoreach,the“blackhole”.Itistohelpstudentsimaginewhatitislikeneara“blackhole”.Askstudentstoreadthroughthepassageandtrytoknowmoreaboutastronomyandgravity.Attheendoftheclass,askstudentstoretellthetwopassages.Inordertoarousestudents’interest,theteachercanholdacompetitionamongthem.教课要点Developstudents’readingskillsbyextensivereading.Letstudentsreadandunderstandthetwopassages.教课难点1.Enablestudentstolearntousereadingstrategiessuchasskimming,scanning,andsoon.2.Getstudentstounderstandthesciencefictionstoriesinthisunit.三维目标知识目标Getstudentstolearnsomeusefulnewwordsandexpressionsinthispart:spaceship,pull,float,mass,cheerup,nowthat,breakoutGetstudentstoreadthesciencefictionstories.能力目标1.Developstudents’readingskillsbyextensivereadingandenablethemtolearnhowtousedifferentreadingskillstoreaddifferentreadingmaterials.Havestudentslearntousetheusefulnewwordsandexpressionscorrectly.3.Enablestudentstounderstandthepassagesandknowmoreaboutastronomyandgravity.感情目标Stimulatestudents’interestinastronomyandspacetravel.Developstudents’senseofgroupcooperationandteamwork.教课过程Step1RevisionCheckthehomeworkexercises.Asksomepairsofstudentstocometothefrontandactouttheirdialoguetoreviewtheexpressionsofgivinginstructions.HavesomestudentstalkaboutIsaacNewton,AlbertEinsteinandStephenHawkingaswellastheirideasongravity.Step2WarmingupLetstudentstobrainstormthefollowingquestions:Whatcountryfirstsentpeopleintospace?Howmanycountrieshavesucceededinsendingpeopleintospacesofar?Whofirstlandedonthemoon?WhoisthefirstChineseastronauttogointospace?Doyouwanttovisitthemoon?Step3ReadingAskstudentstoreadthepassageandthendescribethethreewaysinwhichgravitychangedforLiYanpingandhowhisweightchanged.1)WritedownthethreewaysinwhichgravitychangedforLiYanping.ThewaygravitychangedLefttheearthInspaceOnthemoonSuggestedanswers:ThewaygravitychangedLefttheearthThegravitybecameverystrong.InspaceThegravitydisappeared.OnthemoonThegravitybecameverylight.2)Hisweightchangedthreetimes,too.Nowwritethemdown.HowhisweightchangedLefttheearthInspaceOnthemoonSuggestedanswers:HowhisweightchangedLefttheearthHebecameveryheavy.InspaceHehadnoweightandcouldfloataroundlikeafeather.OnthemoonHewasaboutone-sixthofhisweightontheearth.2.Askstudentstoreadthepassagealoudtothetapeandunderlinealltheusefulexpressionsorcollocationsinthepassage.Letstudentsreadthemaloudandcopythemdownintheirexercisebookafterclassashomework.Trytokeeptheminmind.Collocations:beluckyenoughtodo,haveachance,makeatripintospace,explainsth.tosb.,theforceofgravity,beoff,thepulloftheearth’sgravity,fallbacktotheearth,falltotheground,toofarfromtheearth,asif,atall,getcloseto,cheerup,comeon,lessthan,downthesteps,stepforward,twiceasfaras,fallover,abitof,nowthat,afterawhile,getthehangof,breakout,ontheoutsideof,bepushedintoStep4ImportantlanguagepointsBeforeweleft,LiYanpingexplainedtomethattheforceofgravitywouldchangethreetimesonourjourneyandthatthefirstchangewouldbethemostpowerful.在出发以前,李彦平向我解说说,在我们的航行中会有三次引力的改变,而第一次的改变将是最强的。句子中thattheforceofgravitywouldchangethreetimesonourjourneyandthatthefirstchangewouldbethemostpowerful是两个并列的that引导的宾语从句,作动词explain的宾语。一个动词若带两个宾语从句,第二个指引词

that

一般不省略。比方

:Thegirlstoldhim(that)theywereonatraintripacrossCanadaandthattheyhadonlyonedayinMontreal.姑娘们告诉他,她们乘火车来旅行,要横穿加拿大,在蒙特利尔待一天。Iunderstandnotonly(that)youhavestudiedChinesebutalsothatyouhavewrittenChinesepoetry.我知道,你不但学了中文,并且还写中文诗。2.Icheeredupimmediatelyandfloatedweightlesslyaroundinourspaceshipcabinwatchingtheearthbecomesmallerandthemoonlarger.我马上感觉很快乐,因为失重我在太空舱里飘来飘去,我望着（身后的）地球愈来愈小,而（前面的）月球愈来愈大。watchingtheearthbecomesmallerandthemoonlarger是此刻分词短语,在句中作状语。cheer(sb.)up:(causesb.to)becomehappierormorecheerful喝采;喝采;感觉快乐;使快乐Tryandcheerupabit;lifeisn’tthatbad!想方法快乐点,生活其实不是那么糟！Thecrowdcheeredupwhentheysawtheteamarrive.当看到球队的到来,人群喝采起来。Hetookhertotheconcerttocheerherup.他带她去听音乐会来使她快乐。watch...do/doing观看,凝视Wewatchedthesunsettingbehindthetrees.我们看着太阳正在树后边落下。Everydayastheywatchedtheplantgrow,theirheartsfilledwithhope.每天当他们看到植物生长

,他们的心里都充满了希望。3.“Ohdear,

”

Icried,

“walking

doesneedabit

ofpractice

nowthatgravityhaschanged.

”“天哪,”我大声说,“重力改变了,看来走路也的确需要练一练了。”now(that)...:becauseofthefact(that)...既然;因为Now(that)everybodyishere,wecanbeginthemeeting.既然每个人都到了,我们就可以开始会议。Now(that)youareabigboyyoumustbehavebetter.因为你是一个大男孩,你就一定行为表现得更好。4.Wewatched,amazedasfirebrokeoutontheoutsideofthespaceshipastheearth’sgravityincreased.我们惊诧地看着

,

跟着地球引力的增添

,

宇宙飞船的外层燃烧起火。句子中的

asfirebrokeoutontheoutsideofthespaceship

和

astheearth

’sgravityincreased

均为

as

指引的状语从句。amazed是过去分词

,

在此处作状语。Hecameinunnoticed.他神不知鬼不觉地走了进来。Manyheroeslieburiedinthechurchyard.好多英豪埋葬在教堂的墓地里。breakout:(ofviolentevents)startsuddenly

（指激烈事件

,

如战争、火灾、疫情等）忽然发生;迸发Firebrokeoutduringthenight.夜间忽然发生了火灾。Warbrokeoutin1939.战争迸发于1939年。Aquarrelbrokeoutsuddenlyatmidnight.在深夜,忽然有人吵嘴。Step5ReadingtaskTurntoPage66.1.Askstudentstoreadthepassageandanswerthetwoquestions.1)Canablackholebeseen?Howdoyouknowit’sablackhole?Whathappenedtothespaceshipfromthebeginningtotheend?Suggestedanswers:1)No,itcan’tbeseen.Youcanseethingsdisappearintowhatappearstobeemptyspace.2)Atfirstthelightsonthespaceshipwentoutandthecomputerstoppedworking.Thenthespaceshipjumpedandbegantomovearoundtheedgeoftheoutsideofthehole.Asthespaceshipmovedaroundthehole,itbegantogofasterandfaster.Butthenthespaceshipjumpedagain,anditmovedsidewaysfromtheblackhole.Itbegantoincreaseitsspeeduntilitseemedtobegoingasfastaslight.Atlast

thespaceshipsloweddownandthecomputerstarted

workingagain.2.Letstudentsreadthepassageagainanddothefollowing:Supposeyouareascientistreadingthispassage.Usethischecklisttodiscoverthenewideasabout“blackholes”.Thenwritethemfortheotherscientiststoreadabout.Oldideasabout“blackWasthiswhatwefound?Newideasabout“blackholes”holes”1.Blackholescannotbeseen.2.Gravitypullsobjectstowardsthem.3.Objectsgoroundoutsidetheedgeofthe“blackhole”.4.Allobjectsmustgointothe“blackhole”whentheyarecaughtbyitsgravity.Severalminuteslater,showtheanswersonthescreenandcheckthemwiththewholeclass.Atthesametime,dealwithanydifficultlanguagepointsthatstudentscan’tunderstand.Suggestedanswers:Oldideasabout“blackWasthiswhatwefound?Newideasabout“blackholes”holes”1.BlackholescannotbeYesseen.2.GravitypullsYesobjectstowardsthem.ObjectsgoroundYesoutsidetheedgeofthe“blackhole”.4.AllobjectsmustgoYesintothe“blackhole”whentheyarecaughtbyitsgravity.Step6Consolidation

Theycanbethrownfarfromthe“blackhole”bytheenergyinthe“blackhole”.Askstudentstogobacktothetwopassages.Giveth