人教版高中英语教案必修三Unit4Astronomythescienceofthes

1Unit4Astronomy:thescienceofthestarsPeriod5Usinglanguage:Extensivereading整体设计教材分析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.教学重点1.Developstudents’readingskillsbyextensivereading.2.Letstudentsreadandunderstandthetwopassages.教学难点1.Enablestudentstolearntousereadingstrategiessuchasskimming,scanning,andsoon.2.Getstudentstounderstandthesciencefictionstoriesinthisunit.三维目标知识目标1.Getstudentstolearnsomeusefulnewwordsandexpressionsinthispart:spaceship,pull,float,mass,cheerup,nowthat,breakout2.Getstudentstoreadthesciencefictionstories.能力目标1.Developstudents’readingskillsbyextensivereadingandenablethemtolearnhowtousedifferentreadingskillstoreaddifferentreadingmaterials.2.Havestudentslearntousetheusefulnewwordsandexpressionscorrectly.23.Enablestudentstounderstandthepassagesandknowmoreaboutastronomyandgravity.情感目标1.Stimulatestudents’interestinastronomyandspacetravel.2.Developstudents’senseofgroupcooperationandteamwork.教学过程→Step1Revision1.Checkthehomeworkexercises.2.Asksomepairsofstudentstocometothefrontandactouttheirdialoguetoreviewtheexpressionsofgivinginstructions.3.HavesomestudentstalkaboutIsaacNewton,AlbertEinsteinandStephenHawkingaswellastheirideasongravity.→Step2WarmingupLetstudentstobrainstormthefollowingquestions:Whatcountryfirstsentpeopleintospace?Howmanycountrieshavesucceededinsendingpeopleintospacesofar?Whofirstlandedonthemoon?WhoisthefirstChineseastronauttogointospace?Doyouwanttovisitthemoon?→Step3Reading1.AskstudentstoreadthepassageandthendescribethethreewaysinwhichgravitychangedforLiYanpingandhowhisweightchanged.1)WritedownthethreewaysinwhichgravitychangedforLiYanping.ThewaygravitychangedLefttheearthInspaceOnthemoonSuggestedanswers:ThewaygravitychangedLefttheearthThegravitybecameverystrong.InspaceThegravitydisappeared.OnthemoonThegravitybecameverylight.2)Hisweightchangedthreetimes,too.Nowwritethemdown.HowhisweightchangedLefttheearthInspaceOnthemoonSuggestedanswers:HowhisweightchangedLefttheearthHebecameveryheavy.InspaceHehadnoweightandcouldfloataroundlikeafeather.OnthemoonHewasaboutone-sixthofhisweightontheearth.2.Askstudentstoreadthepassagealoudtothetapeandunderlinealltheusefulexpressions3orcollocationsinthepassage.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,bepushedinto→Step4Importantlanguagepoints1.Beforeweleft,LiYanpingexplainedtomethattheforceofgravitywouldchangethreetimesonourjourneyandthatthefirstchangewouldbethemostpowerful.在启程以前,李彦平向我解释说,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,第二个引导词that一般不省略。例如:Thegirlstoldhim(that)theywereonatraintripacrossCanadaandthattheyhadonlyonedayinMontreal.姑娘们告诉他,她们乘火车来旅游,要横穿加拿大,在蒙特利尔待一天。Iunderstandnotonly(that)youhavestudiedChinesebutalsothatyouhavewrittenChinesepoetry.我知道,你不仅学了中文,而且还写中文诗。2.Icheeredupimmediatelyandfloatedweightlesslyaroundinourspaceshipcabinwatchingtheearthbecomesmallerandthemoonlarger.我立刻感到很高兴,由于失重我在太空舱里飘来飘去,我望着（身后的）地球越来越小,而（前方的）月球越来越大。watchingtheea