2017年高一英语人教版必修3教案：Unit4Reading+Word版含解析

教学设计ReadingTeachinggoals：Knowledgeaims：1．Getstudentstolearntheusefulwordsandexpressionsinthispart：astronomy，system，religion，theory，atom，billion，globe，violent，carbon，atmosphere，unlike，fundamental，harmful，acid，chain，multiply，oxygen，exist，thus，dioxide，puzzle，solarsystem，intime，layeggs，givebirthto，inone'sturn，carbondioxide，prevent…from2．Letstudentslearnaboutthedevelopmentoftheearthandlife.Skillaims：1．Improvestudents'readingcomprehensionability.2．Enablestudentstoknowabouthowtheearthcameintobeingandthedevelopmentoflife.Moralcultureaims：1．Trainstudents'interestinscienceandstimulatetheirloveforastronomy.2．Haveadeepunderstandingoftheimportanceofprotectingtheenvironment.Teachingimportantanddifficultpoints：1．Discussthedevelopmentoflife.2．Whatwillourfuturebelikeiftheearthbecomestoohottolive？Andwhatcanwedotopreventsuchserioussituationfromhappening?Teachingmethods&strategies：1．Task­basedmethod&skimmingandscanning.2．Asking­and­answeringactivitytocheckstudents'understandingofthetext.3．Observationstrategy&co­operationstrategyfordiscussion.4．Strategiesoffindinginformationbyreading.5．Individual，pairorgroupworktofinisheachtask.Teachingaids：ArecorderMultimediaTeachingprocedures：tep1Lead­in（individualwork）T：Asweallknow，theearthhasbeenexistingforbillionsofyears.Did_human_beings_live_on_the_earth_when_the_earth_came_into_being?Ifnot，wheredohumanbeingscomefrom？Orwhowereourancestors?S1：Monkeys!S2：BeijingRenwholivedmanyyearsago.S3：Apes（类人猿）．S4：Gorillas（大猩猩）．S5：Chimpanzees（黑猩猩）．T：Verygood.Theybelongtoprimate（灵长目动物）．Anotherquestion：Doyouknowwhatplaysthemostimportantpartinourbody？（Waterorfat？）T：Water.Thendoyouknowhowdidwatercomeintobeingontheearth?Ss：No.Step2Fastreading（task1）ReadParagraphs1­3.Afterreading，letstudentswatchthevideoof“BigBang”，andthenanswerthequestion“Howdidwatercomeintobeingontheearth？”（individualwork）Possibleanswer：Theexplosionoftheearthproducedwatervapour，whichturnedintowaterwhentheearthcooleddown.Readthefirstthreeparagraphsagainwiththequestionsonthescreen：1）Whatistheearth'satmospheremadeupof?2）Whywastheearthdifferentfromotherplanets?A．Itproducedalotofheat.B．Thewaterremained.C．Waterdisappeared.D．Itwastheoldestplanet.3）Whywaswaterveryimportantforthebeginningoflife?Whenstudentsmeetsomedifficulty，theteachercangivethemsomehints.Forexample：Whatistheearth'satmospheremadeupof?（Showstudentssomepicturesabouttheearth'satmosphere.）Dotheexercises.（groupwork）Checktheanswers.Possibleanswers：1）Carbon，nitrogen，watervapourandothergases.2）B3）Waterallowedtheearthtodissolveharmfulgasesandacidsintotheoceansandseas.Thatmadeitpossibleforlifetobegintodevelop.Step3Intensivereading（task2）T：Whenwatercameintobeingontheearth，lifebegan.Thendoyouknowhowthelifedeveloped?Readthewholetextandfinishthechart.（pairwork）DevelopmentofLifeAsktwostudentstowritetheiranswersontheblackboard.Possibleanswers：1．dust2．globe3．atmosphere4．Water5．plants6．oxygen7．land8．amphibians9．dinosaurs10．mammalsStep4Haveadiscussion（task3）Throughthewriter'sdescription，welearnedthedevelopmentoflife.It'salongandslowprocess.Andtheearthisthebestplaceforallthelivingthingstoliveon.Buthumanbeingsdidn'ttakegoodcareofit.Listentothelastparagraphtwicewithbooksclosed.Choosethebestanswers.（individualwork）1）Whatproblemiscausedbyhumanbeings?A．Theyexisteverywhereontheearth.B．Theycauseglobalwarming.C．Theyfindnewmethodsofgrowingcrops.D．Theyenjoyhuntingandfishing.2）Fromthelastparagraphwecaninferthattheauthorisalittle______.A．happyB．carelessC．worriedD．excitedPossibleanswers：1）B2）CNowwelearnthathumanbeingscauseglobalwarming.Thatisthegreenhouseeffect.Iftheearthmaybecometoohotforthelivesonit，whatwillourfuturebelike？Andwhatcanwedotoprotectourearth?Pleasehaveadiscussionaccordingtothequestions.（groupwork）Questions：1）Whatwillourfuturebelikeiftheearthbecomestoohottolive?2）Whatcanwedotoprotectourearth?Notes：Thegreenhouseeffectisthemaincauseofthemeltoficeberg，drought，floodsandinsectpest.Everyoneontheearthmusttakeactiontoprotectourearth.Forexample，wecanplantmanytrees.Wemustdoourbesttostoppollutingourenvironment.Manynewlawsshouldbepassedtoplacestrictcontroloverindustrialpollution.Educatepeopleinfightingpollution.Asksomegroupstopresenttheiropinions.Step5Self­assessmentWritedownyouropinionsaccordingtothequestionsinthecard.1）Canyougiveabriefintroductiontohowtheuniversedeveloped，howlifebeganontheearthandthedevelopmentoflifeinyourownwords?2）Whatstrategiesofreadinghaveyoulearnedintheclass?3）Areyouactiveintheclass?4）Whatpr