第五单元教学内容及过程.doc

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1、第五单元教学内容及过程TheFirstPeriod:Leading-inClassTeachingProcessMethodandTimeStep1Lead-in:ListeningPractice:(materials:PartIIListening-centeredactivities)Questionsfordiscussion:(1)WhatorganizationreleasedthenewstatisticsonAIDS?(2)WhatpercentageofthepopulationinfectedwithHIVin2004were

2、children?(3)Whatdoyouthinkisthegreatesthealthrisktohumanbeings?listening&pairwork(15minutes)Step2BackgroundintroductionAIDSandHIVAIDSstandsforAcquiredImmuneDeficiencySyndrome:　　·　Acquiredmeansyoucangetinfectedwithit;　　·　ImmuneDeficiencymeansaweaknessinthebody'ssystemthatfight

3、sdiseases;　　·　Syndromemeansagroupofhealthproblemsthatmakeupadisease.AIDSisdefinedasoccurringinpeoplewithantibodies(抗体)toaviruscalledHumanImmunodeficiencyVirus(HIV),whichisthoughttohaveoriginatedinAfricanmonkeysandpassedtohumanpopulationsduringthetwentiethcentury.HIVspreadsthr

4、oughcontactwithinfectedblood,infectedsexualpartners,orwithinthewombofaninfectedpregnantmother.AIDSusuallydevelopsinfourstages:(1)Inthefirststage,thereisonlyinfectionbyHIVandantibodyproduction;(2)Inthesecondstage,thelymphnodes(淋巴结)enlarge;(3)Inthethirdstage,aninfectedpersonmay

5、begintohavesuchsignsastiredness,fever,andnightsweats;(4)Inthelaststage,AIDSisdiagnosedwhenapersondevelopscertainuncommon,life-threateningillnesses,forexample,Pneumocystiscariniipneumonia(卡氏肺囊虫肺炎).AIDSisaglobal,humanepidemic.TheWorldHealthOrganizationandUNAIDSestimatedthatbetw

6、een2.8and3.5millionpeoplewithAIDSdiedin2004.Anestimated22millionpeoplewithAIDShavediedsince1981.However,thesestatisticsareonlyestimates,asitisnotknownhowmanypeoplehaveactuallydiedofAIDS.Students’presentationanddiscussion(20minutes)Step3Discussion:Questionsfordiscussion(1)what

7、doyouknowaboutAIDSanditstransmission?Groupdiscussionandoralreport(15minutes)The2ndand3thPeriods:In-classReadingTeachingProcessMethodandTimeStep1Lead-in:oralreportonAIDSOneofthestudentsisassignedtosearchtheinternetforinformationaboutAIDSandOralreport(15minutes)makeanoralreport

8、toclassStep2:Analysisontheimportantlanguagepoints.(Para.1-Para.7)1.（