人教版高中英语教案选修六Unit4GlobalwarmingPeriod6

1Period6SummingUp，LearningTipandAssessment整体设计教学内容分析Thisisthelastteachingperiodofthisunit，sotheemphasisshouldbeplacedongoingoverandsummarizingwhathasbeenlearnedinthisunit.Itincludesthefollowingparts：SummingUp，LearningTip，CheckingYourselfandsomeotherconsolidationexercises.SummingUpsummarizesthewholeunitfromtheaspectsoftopicsandvocabularyandgrammar.Theteachercanfirstusethisparttoletstudentssumupwhattheyhavelearnedinthisunitandthenletthemfindoutwhattheycan'tunderstandverywell.LearningTipgivesstudentsinstructionsonwhichkindofnounsbeginwithacapitalletter.Letthestudentsthinkaboutwhattheyalreadyknowabouttherulesandwhatnewinformationtheywillfind.CheckingYourselfonPage68intheWorkbookaimsatencouragingstudentstomakeaself－assessmentaftertheyfinishlearningthisunit.Itisveryimportanttoimprovetheirlearning.Ofcourse，atestingassessmentisalsoneeded.Inthisperiod，theteachercanalsoprovidemorepracticetoconsolidatewhatstudentshavelearnedinthisunit.三维目标设计Knowledgeandskills1．Togetstudentstomasteralltheusefulnewwordsandexpressionsinthisunit.2．Tohavestudentsunderstandthenewgrammaritem“theuseof‘it’(2)”better，andenablethemtousethesentencepatternscorrectly.3．Todevelopthestudents'abilitytousetheimportantlanguagepointsinthisunit.ProcessandmethodsDesignsomeadditionalexercisesforstudentstodoinorderthattheycanlearntouseandgraspallthecontents.Emotion，attitudeandvalue1．Toencouragestudentstolearnmoreaboutglobalwarmingandenvironmentalprotection.2．Toinspirethestudentstothinkupmoreeffectivemeasurestopreventglobalwarming.教学重、难点Usingwhattheyhavelearnedinthisunittosolverealproblems.教学过程1Revision1．Checkthehomeworkexercises.2．Dictatesomeusefulnewwordsandexpressionsinthisunit.2Lead－inAskthestudentstoturntoPage32.Thinkaboutwhattheyhavelearnedinthisunitandticktheboxestoseehowwelltheyhavelearnedthem.3SummingupFiveminutesforthestudentstosummarizewhattheyhavelearnedinthisunitbythemselves.Thencheckandexplainsomethingwherenecessary.Suggestedanswers：2Writedownwhatyouhavelearnedaboutglobalwarming：(Students'answersmayvary.)ThetemperatureoftheearthroseaboutonedegreeFahrenheitduringthe20thcentury.Itishumanactivitythathascausedthisglobalwarming.Allscientistssubscribetotheviewthattheincreaseintheearth'stemperatureisduetotheburningoffossilfuels.Somebyproductsofthisprocessarecalledgreenhousegases，whichtrapheatandwarmtheearth.Withoutthegreenhouseeffect，theearthwouldbecoolerthanitis.Butscientistsdon'tagreewitheachotherontheeffectsofglobalwarming.Somethinkitwillbeadisaster，butsomeothersthinkit'sagoodthingandwecandonothingtopreventthetrend.Byreadingthesecondpassage，wealsoknowsomeeasyandeffectivemeasureswecantaketodealwithglobalwarming.Fromthisunityouhavealsolearned：Someusefulwords：tend，oppose，state，glance，quantity，range，tendency，circumstance，opposed，steady，widespread，average，consume，subscribe，advocate，refresh，graph，phenomenon，fuel，data，trend，catastrophe，flood，consequence，existence，commitment，pollution，growth，motor，can，microwave，educator，contribution，presentation，disagreement，random，mild，outer，electrical，casual，nuclear，perSomeusefulexpressions：comeabout，subscribeto，quantitiesof，goup，resultin，beopposedto，evenif，keepon，onthewhole，onbehalfof，putupwith，solongas，andsoon，greenhouseeffectNewgrammaritem：theuseof“it”—howtouse“it”foremphasisinasentence.Functionalitems：howtoexpressagreementanddisagreement，blameandcomplaint.4PracticeShowtheexercisesonthescreenorgiveoutexercisepapers.Part1Vocabulary1．Researchersc______livingconditionsinLondonwiththoseinotherplaces.2．Theirpricesarelowc______tothoseinothershops.3．Idon'tthinkanybodym______toherapartfromherself.4．Heprefersq______toqualitywhenfoodisconcerned.5．Thed______wehavecollectedarenotenoughtobeconvincing.6．Everythingwasinas______ofdisorder.7．Whatisthea______rainfallforAugustinyourcountry?8．Eachi______boyintheclasshashisownpersonalities.9．Wehavebeenhavingafewa______inthecommitteelately.10．Theywerep______inthehistoryofmusic.11．Asac______ofbeinginhospital，Shellydecidedthatshewantedtobecomeanurse.12．Adoctorhasthet______“Dr”infrontofhisname.13．Thenumberofthechildrenintheschoolhasd______by500thisyear.14．Thecookerisn'tworkingbecauseofane______fault.15．Thefoodwascoldandtheguestsquarreled—thewholedinnerwasac______.Part2Usefulphrases1．在20世纪期间____________2．导致____________3．另一方面____________4．通过燃烧化石燃料____________[来源:Zxxk.Com]5．大量的____________36．忍受污染____________7．有关系，有影响____________8．大体上，基本上____________9．高达5摄氏度____________10．发生____________Part3Completethefollowingsentencesaccordingtothetexts.1．Anenergysourceisrenewablewhensuppliesofitnever____________.2．Itisarapidincrease______________________________.3．Thereis____________thattheearthisbecomingwarmingbutthereis__________________whetheritis__________________hascausedthisglobalwarmingorwhetheritis________________________.4．______thegreenhouseeffect，theearth____________aboutthirty－threedegreesCelsius________________________.5．The____________ofcarbondioxide______thatmoreheatenergyistrappedintheatmosphere______the______________________________.6．Itwas__________________CharlesKeeling______made_____________