教學(xué)設(shè)計這篇課文共7段，篇幅較長，并且是科普題材，其中涉及了較多的專業(yè)術(shù)語，對于初上高二的學(xué)生來說還是有難度的。但是它的結(jié)構(gòu)很清晰，且話題學(xué)生感興趣，我決定從這兩方面入手，激發(fā)學(xué)生的興趣，提高課堂效率。所以教學(xué)設(shè)計以宏觀閱讀為主，突出科普文的寫作特點(diǎn)。下面我就詳述我的教學(xué)步驟，并附設(shè)計初衷。準(zhǔn)備這堂課以分組討論的方式進(jìn)行，所以上課前先說明評價方式。每答對一個問題將獲得一朵小花（我兒子和外甥女做的，有點(diǎn)兒丑。共有大約30個問題，10個小組是平時班里就有的學(xué)習(xí)小組），獲得小花最多的小組就是冠軍組。Step1Leading-in(Brainstorming)Whatwillyouthinkofwhenreferringtoglobalwarming?SsmayshowmanyanswersandmeantimepresentthemthepicturesinthePPT.Thenask::Asforglobalwarming,isitanopinionorafact?Theythinkitisafact.Askthemtofindoutthesupportinthetext.(the1stsentenceofpara1)Thereisnodoubtthattheearthisbecomingwarmer(seeGRAPH1)ThenaskWhatcausestheglobalwarming?AfossilfuelsBgreenhousegasesCgreenhouseeffectDhumanactivity(itishumanactivitythathascausedglobalwarmingratherthanarandombutnaturalphenomemnon.)Therearesomanytechnicaltermsmentionedinthechoices,sodealwiththemonebyonebythepicturesinthePPT.Greenhouseisawarmhouseusedforplantingflowersincoldweather;thebluecirclecalledatmospherearoundtheearthisthegreenhouseoftheearth,andthegasesintheatmospherearecalledgreenhousegases,absorbingandreflectingtheheatofthesun,escaping,reflectingtheheatoftheearth;itprotectsushumanbeingsfromfeelingtoohotandtoohot;theprocedureiscalledgreenhouseeffect.Uptonow,everythinghasbeenfine,butifwehumanbeingsputtoomuchgreenhousegasesbyburningfossilfuels,moreheatwillbetrappedintheatmosphereandthetemperatureoftheearthwillrisethatisglobalwarming.AscientistnamedCharlesKeelinghadmadeaccuratemeasurementsaboutthecontentofcarbondioxideintheatmosphere(seeGraph2).Sowecandrawaconclusion:Itishumanactivitythathascausedthisglobalwarmingratherthanarandombutnaturalphenomenon.Step2Reading(Now,Ihavesolvedthetechnicalterms.)I’vetalkedsomuch,thenit’syourreadingtime.Glancequicklyatthemagazinearticleandanswerthequestions.1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?2.Whatarethenamesofthethreescientistsmentionedinthearticle?3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?4.Whatisthemainideaofthearticle?(Filluptheblanks.)Thepassageshowsuspeople’s___________________toglobalwarming,andanalysesthe________foritandthe_____basedongraphsanddata.Dealwith4thonefirst,beacauseit’saboutthemainideaofthepassage.Then123.The3rdonetalksaboutdifferentattitudestoglobalwarmingandIstillhaveachartforthedetailsofit.Oncetheyfinishthechart,theywillhavefinishedreadingthe6thparagraph.Step3PassagestructureandwritingskillsWhilereading,wehavesensedtheclearstructureofthetext,let’sworkonit.Thereare7paragraphstogetherinthepassage.Howcanthe4partsbedivided?Tips:Part1(para__)Part2(para___to___)Part3(para___)Part4(para___)Thisoneiseasy,amorechallengingtaskforyou.MainideasWritingtechniquesPart1:_______________Raising_________Part2:_________________________________giving____________using_______________Part3:__________________________________________________giving________,making________Part4:_________________________________________________________Using_________,leavingreaderstothinkovertheissueStep4DiscussionInthelastparagraphtheauthorusesaquestionleavingreaderstothinkovertheissue:whetherpeopleshoulddosomethingaboutglobalwarmingornot.Nowit’syourtimetodiscussthisquestionWhat’syouropinionaboutglobalwarming?Shouldwedosomethingaboutthis?Askfourgroupstopresenttheirdicussionresultandallofthemthinktheresultsofglobalwarmingwillbeterrible.Theyalsogivesomepracticalmeasuresindailylife.Thenaskthemtodecidewhetherthefollowingbehavioursarerightorwrongtoarisetheawarenessofenvironmentprotecting.Keepinmindthat:Yourcontributioncounts!Step5GroupworkevaluationLet’sseewhichgroupgotthemostflowers.(thegroupwhichgot5flowersistheNo.1group.)Let’sgivethemsomeclaps.Step6Self-assessmentWehavefinishedreadingthetext.Howmuchhaveyoulearntaboutthepassage?Haveyougraspedtheimportantwordsandphrases?Dothefollowingexercisetocheckyourself.Step7Evaluationofsomestudents’workIfyourscoresareabove85,thencongratulate;butifyourscoresarebelow75,thenyouneedworkharder.Step8HomeworkWriteapassagetoshowyouropinionsaboutglobalwarmingandthethingsweshoulddo學(xué)情分析本班學(xué)生為高二年級。學(xué)生已達(dá)到《高中新課程標(biāo)準(zhǔn)》7級水平，有一定的英語知識基礎(chǔ)、認(rèn)知水平和邏輯思維能力，對已經(jīng)掌握的語言知識的練習(xí)能夠駕輕就熟，所以在教授時要借助于學(xué)生已經(jīng)掌握的知識和生活經(jīng)驗(yàn)展開并且在教學(xué)中要注意以鼓勵引導(dǎo)為主，使學(xué)生的認(rèn)知心理得到拓展，提高他們的求知欲望和表現(xiàn)欲。ThestudentsarefromSenior2whohavepossessedNewCurriculumStandardLevelSeven.AfterlearningEnglishforatleast8years,theyhavesomebasicabilityinacquiringEnglishknowledge.Andthestudentsofthisagealsohavesomebasicanalyticalskillsandlogicalthinkingskills.Teachersshouldhelpthemmasternewknowledgebyguidingthemtomakefulluseofwhattheyhavelearnedandtheirlifeexperience.效果分析這是一份測試性評價，大約10%的學(xué)生可以滿分完成，60%的學(xué)生得分可以在85以上，其他學(xué)生得分較低或在規(guī)定的時間內(nèi)沒有完成。所以評測內(nèi)容基本有效，但量可能略多。教材分析人教版的高中教材從第六模塊開始為選修，基礎(chǔ)單詞和語法已經(jīng)學(xué)完，主要進(jìn)行知識點(diǎn)和語法的復(fù)習(xí)和綜合。Unit4—GlobalWarming的話題是學(xué)生們熟悉和感興趣的，很容易引發(fā)學(xué)生的共鳴。我準(zhǔn)備用五個課時完成這一單元的教學(xué)：課時1熱身，讀前和閱讀。將教材中閱讀后的理解題融入閱讀中。課時2知識點(diǎn)。用我們自己制作的學(xué)案代替課文內(nèi)容，內(nèi)容更豐富詳實(shí)。課時3語法利用自己制作的學(xué)案，對學(xué)過的，重現(xiàn)在課文中的語法進(jìn)行綜合歸納，并附有高考真題。課時4閱讀和寫作處理本單元第二篇課文，并進(jìn)行寫作指導(dǎo)。課時5讀，說和小結(jié)。評價學(xué)生該單元的學(xué)習(xí)情況。Basicvocabularyandgrammarhavebeenfinishedfrommodule5,andwemainlydealwiththerevisionoflanguagepointsandgrammarinmodule6.Iplantofinishtheunitusing5lessons:Lesson1warmingup,pre-reading&reading.Combinethecomprehensionafterthetextwithmyreadingdesign.Lesson2Languagepoints.Wewillusethelearningpapersmadebyourselves,whicharemorerichandpractical.Lesson3GrammarMakeuseofthepapersweourselvesmadetosummarizewhathavebeenlearntbefore.Lesson4Usinglanguage&writing.Dealwiththe2ndreadingandguidetheSs’writing.Lesson5Listening,speaking&summary.EvaluatethelearningofSsinthisunit.這節(jié)課處理的是課時1熱身，讀前和閱讀。我認(rèn)為這屆閱讀課中的難點(diǎn)是一些科學(xué)術(shù)語，像溫室，溫室氣體，溫室效應(yīng)，化石燃料，甚至全球變暖。對于這些科學(xué)術(shù)語，學(xué)生僅是一知半解，如果直接讓他們讀英語的課文，在理解上肯定有一定的障礙。所以我借助圖片使這些概念直觀化，再結(jié)合英文減少閱讀中的障礙。另一個難點(diǎn)是文章的長度，共七段近一千字的英文文章對于初上高二的學(xué)生來說是有難度的。如何讓學(xué)生撥開云霧發(fā)現(xiàn)文章的主旨？只有借助文章的結(jié)構(gòu)分析。好在這評文章的結(jié)構(gòu)還很清晰。我在一開始建設(shè)下伏筆，一步步揭開神秘面紗：Whatcausestheglobalwarming?1.Whowrotethemagazinearticle?Whatisthenameofthemagazine?2.Whatarethenamesofthethreescientistsmentionedinthearticle?3.Whatdotheythinkaboutglobalwarming?Dotheyagreewithoneanother?4.Whatisthemainideaofthearticle?(Filluptheblanks.)Thepassageshowsuspeople’s___________________toglobalwarming,andanalysesthe________foritandthe_____basedongraphsanddata.Whilereading,wehavesensedtheclearstructureofthetext,let’sworkonit.Thereare7paragraphstogetherinthepassage.Howcanthe4partsbedivided?Tips:Part1(para__)Part2(para___to___)Part3(para___)Part4(para___)Thisoneiseasy,amorechallengingtaskforyou.MainideasWritingtechniquesPart1:_______________Raising_________Part2:_________________________________giving____________using_______________Part3:__________________________________________________giving________,making________Part4:_________________________________________________________Using_________,leavingreaderstothinkovertheissue這樣一步步處理下來，學(xué)生水到渠成的解決了最困難的問題。評測練習(xí)Self–assessmentpapers一根據(jù)課文內(nèi)容填空25%Duringthe20thcenturythetemperatureoftheearth_=1\*GB3①______aboutonedegreeFahrenheit.Howhasthis=2\*GB3②______about?Allscientists=3\*GB3③___________totheviewthatitishumanactivitythathascausedtheglobalwarming.Theburningoffossil=4\*GB3④________likecoal,naturalgasandoilhas=5\*GB3⑤_________intheincreaseincarbondioxide,=6\*GB3⑥___________ofwhichareaddedintotheatmosphere.Theglobaltemperature=7\*GB3⑦_(dá)______up.Theattitudesofscientiststowardstherisearecompletelydifferent.=8\*GB3⑧_______theonehand,somethinkthe=9\*GB3⑨_______wouldbeacatastrophe.Ontheotherhand,someare=10\*GB3⑩________totheaboveidea.Theythinkitwillbebeneficialtoplants,cropsandagreaterrangeofanimals.二．根據(jù)所給漢語意思及其詞性寫出單詞:40%1.數(shù)據(jù)(n.)________2.現(xiàn)象(n)_________,(pl.)_________3.圖表(n.)_______4.結(jié)果，后果(n.)_________,(adj.)_________5.污染(n.)________,(v.)__________6.大災(zāi)難(n)________7.氣候(n.)________8.穩(wěn)固的(adj.)__________,(平穩(wěn)地，持續(xù)地adv.)__________9.減少(v.)_______,(反義詞v.)________10.The________(平均數(shù))of4,8and3is5.11.Therehasbeenserious________(分歧)betweenthetwopoliticalpartiesoverthequestion.三.在下列空格中填入適當(dāng)?shù)脑~,將其補(bǔ)充完整:35%1.come______發(fā)生，造成;2.compare______/______和~~比起來;3.__________________大量的4.result______導(dǎo)致5.putup______忍受，容忍6.makea______有關(guān)系，有影響7.anso______等等;8.build______逐步建立，增加9.keep______繼續(xù)10.havean______on對~~由影響11.onthe______大體上，基