高中英語人教版Unit4Globalwarming 教案

Unit4GlobalwarmingReadingTeachingobjectives：KnowledgeobjectivesLearnabouthowglobalwarmingcomesaboutanddifferentattitudestowardsit.Learntousethewordsandphrasesrelatedtoglobalwarmingandpeople’sattitudes.Comeabout,subscribeto,quantitiesof,beopposedto,keepon,tendto,phenomenon,random,goup,resultin,stateSkillobjectivesImprovethestudents’readingskillsandabilities,suchasskimming,scanning,summingupandsoon.2.Developtheirabilityofanalyzingthetext,catchinginformationanddealingwithinformation.AffectionobjectivesRaisetheawarenessofprotectingtheenvironment.Increasetheawarenessofworkingasateamandsharingopinions.Importantanddifficultpoints：Trytounderstandhowglobalwarmingcomesabout.Trytoexpressopinionsonsimilarphenomenon.Teachingmethods1.Task-basedmethodtomakestudentsinterestedinwhattheywilllearn.2.Fastreadingtogetthegeneralideaofthepassage.3.Carefulreadingtogetsomedetailedinformation.TeachingproceduresStepI：Leadingin(2mins)Testtheirknowledgeoftheworldtemperature.1.Doyouthinktheworldtemperatureisrisingorfalling?2.Enjoyavideoandanswerthefollowingquestions:Whathappenedtotheseanimals?Whycouldthathappen?Becauseofglobalwarming.[設(shè)計說明]

本環(huán)節(jié)是課文導(dǎo)入，利用多媒體播放和本課主題相關(guān)的視頻，創(chuàng)設(shè)輕松和諧的課堂氣氛，激發(fā)學(xué)生興趣，和學(xué)生的原有知識，自然進入本課話題。

StepII：Pre-readingTask1:Wordspreviewtocheckthemeaningsofsomeimportantwordsandphrases.(2mins)[設(shè)計說明]

檢查學(xué)生對重點詞匯的預(yù)習(xí)，為閱讀輸入詞匯。Task2:Predictthesubject(主題)accordingtothetitleandgraphsonPage26.(1mins)[設(shè)計說明]

本環(huán)節(jié)通過標題和文中圖表預(yù)測文章主題，激發(fā)學(xué)生探究問題的興趣，培養(yǎng)學(xué)生把標題和文章主旨聯(lián)系起來的能力。

StepIII：While-readingTask3:Skimmingforthegeneralideaofthewholepassage.(3mins)Thepassagemainlytalksabouttherisingofthetemperature,reasonsforthechangeanddifferentattitudestotheproblem.Task4:Scanningforthemainideaofeachpart.(3mins)First,numbereachparagraph,andthendividethepassageinto4partsforthem.Second,GuideSstosumupthemainideaofeachpart.TelltheSsthattheycansumupthemainideaofeachpartbygoingthroughthetopicsentencesaswellasthekeywordsandphraseineachparagraph.Part1Twodifferentattitudestowardsglobalwarming.Part2Whetherpeopleshoulddosomethingaboutglobalwarming.Part3Howglobalwarmingcomesabout.Part4Anintroductionofglobalwarming.[設(shè)計說明]快速限時閱讀把閱讀課文作為整體來處理，掌握主旨大意。這一任務(wù)過程中為了降低難度，先引導(dǎo)學(xué)生把7個自然段標出序號，然后再展示給他們?nèi)绾伟?個自然段劃分成4部分。在對課文表層理解的基礎(chǔ)上，要求學(xué)生連線找出每部分大意。既訓(xùn)練學(xué)生略讀、查讀的閱讀技能又提高學(xué)生閱讀的積極性。Task5:Carefulreadingtofinishthequestions.(9mins)(1)Readpart1andchoosethebestanswer.Whatisthepurposeofthe1stparagraph?Tointroducetheauthor.Toraiseaquestion.Tointroducethetopic.Toexplaintemperaturechange.TellSsthelasttwosentencescanshowtherightanswer.[設(shè)計說明]本環(huán)節(jié)是根據(jù)第1自然段在文章中的特殊位置和作用而設(shè)計的一道閱讀理解題，培養(yǎng)學(xué)生把握寫作意圖的能力。(2)ReadPart2tofilltheflowcharttoshowhowglobalwarmingcomesbout.Howdoesglobalwarmingcomeabout?Humanactivity→burningof_________→______________areproduced→anaturalphenomenoncalled______________→_____heatfromthesun→Theearthis________.RemindSstopayattentiontothewordsthatindicatetheformationofglobalwarmingsuchas“dueto”,”thisiswhen”and“theproblembeginswhen”.[設(shè)計說明]Part2是本文的重點，讓學(xué)生在仔細讀完文章后填寫全球變暖形成的流程圖，一方面培養(yǎng)學(xué)生通過關(guān)鍵詞捕捉細節(jié)信息的能力，另一方面提高他們對信息的前后聯(lián)系的意識。(3)ReadPart3tofindoutdifferentattitudesabouttheeffectsofglobalwarming.DrFoster:Itcouldbea__________.Theremaybeariseinseverestorms,_____,droughts,famines,the______ofdiseasesandthe_____________ofspecies.GeorgeHambley:Itwillbemildwithfewbad___________.Itwillmakeplantsgrow_______,cropsproduce_____andwillencourage________animals.Tellthemtopayattentiontothewordsandexpressionsthatindicatepeople’sdifferentattitudessuchas“ontheonehand”,“ontheotherhand”,“thinks”,“believes”and“states”.[設(shè)計說明]找出對于全球變暖的不同態(tài)度，訓(xùn)練學(xué)生抓關(guān)鍵詞的能力，同時潛移默化觀點類作文的寫作方法。(4)ReadPart4tofindouttheauthor’sattitudeaboutglobalwarmingWhatisthewriter’sattitudetowardsglobalwarming?optimisticB.pessimisticC.concernedD.uninterestedTellthemthesecondsentenceandthelasttwoquestionsentencescanshowtherightanswer.[設(shè)計說明]對作者的態(tài)度進行判斷是高考閱讀理解?？嫉念}目。本環(huán)節(jié)針對這個考點設(shè)置，旨在考查學(xué)生的推斷能力。Task6:Fillintheblankstolookatitasawhole.(3mins)Thereisnodoubtthattheearthisbecoming_______.Scientistsbelievethat“greenhouseeffect”beginswhenweaddhugequantitiesof_______intotheatmospherebyburning_________.Theincreasedamountofcarbondioxideiscausingtheglobaltemperatureto_____.Scientistsagreetheburningoffuelshas_________thisincrease.Ontheonehand,DrFosterthinksthatanincreaseby5degreeswouldbea__________.Ontheotherhand,GeorgeHambley,_____thatmorecarbondioxideisactuallya_______thing.However,greenhousegasescontinueto_______andtheclimateisgoingto______warming.[設(shè)計說明]再次整體理解文章，鞏固強化文章內(nèi)容，培養(yǎng)學(xué)生整體認知能力。StepIV:Post-reading:Discussandwrite.(15mins)Accordingtowhatyouhavelearnedtoday,discussthepicturesandthenwritedownyourideas.Referencewords:fossilfuels,carbondioxide,air,people’shealth,temperaturebike,bus,onfoot,trees[設(shè)計說明]本環(huán)節(jié)是語言的輸出階段,，選擇生活中與全球變暖有關(guān)的一個具體反面即汽車污染，引導(dǎo)學(xué)生用本節(jié)課所學(xué)知識展開討論并寫下自己對汽車污染的看法，培養(yǎng)學(xué)生的知識遷移能力，提高學(xué)生關(guān)注社會、關(guān)注環(huán)保、為社會做點事的公民意識。是情感目標的體現(xiàn)。StepV:Summary(1min)ThephenomenonofglobalwarmingThereasonsfortheproblemDifferentattitudesThewritingstructureofthepass