Unit4ampnbspEarthquakes

　　unit4earthquakes
　　thefirstperiodleadingin，warmingup
　　amp；prereading
　　byliuxiaohuafromhonglingmiddleschool
　　一、教学目标（teachingaims）
　　student’sbook
　　1。能力目标（abilityaim）
　　a。letthestudentsknowsomethingabouttheearthquakes。
　　b。enablethestudentstotalkaboutwhattheyshoulddoinadisasterforthemselves
　　2。语言目标（languageaim）
　　a。wordsandexpressions
　　imagine，shake，rightaway
　　b。importantsentence
　　whatdoyouthinkmayhappenbeforeanearthquake？
　　二、教学重难点（teachingimportantpoints）
　　letthestudentsknowwhatacorrectattitudetowardsadisasterisandwhattheyshoulddoinadisasterforthemselvesandfortheotherpeople。
　　三、教学方法（teachingmethod）
　　a。discussing
　　b。talking
　　c。activities。
　　四、教具准备（teachingaids）
　　multimediacomputer
　　五、教学步骤（teachingprocedure）
　　step。leadin：
　　t：what’sthebiggestsoundyouhaveheardinyourlife？
　　（thesoundofthewindthatblewinawinternight；thenosewhenplanestakeoff；thesoundoftrains；thesoundofthunder。。）
　　butdidyouoncehearthesoundthattheheavenfallsandtheearthcrack。inchineseitis天崩地裂？
　　ifthereisasoundlikethiswhatisit？whatwillhappen？
　　todaywe’lllearnsomethingaboutearthquakes。canyouimaginehowterribleitis？
　　firstletthestudentsanswerthefollowingquestion。
　　whichofthefollowingmaycausepeoplethegreatestdamage？
　　earthquake，typhoon，flood，drought
　　variousanswersarepossible。studentsshouldgivereasonstosupporttheiranswers。allofthemarenaturaldisasters，theyhavesomethingincommon，atthesametime，theyhavemanydifferences。
　　letthestudentsknowsomethingabouttheearthquake。（slides）
　　t：howdoestheearthquakeoccur？
　　thenshowthefilmtothestudents。（filmabouttheearthquake）
　　t：whensomeplatesoftheearthmovesuddenly，anearthquakehappens。manyearthquakesbeginunderthesea。infact，earthquakesmayhappennearhighmountains。
　　duringanearthquake，theshakingmakerocksrisesuddenlyandevencracksopen。housesfall，peoplearekilledorhurt，andsometimesthewholevillagesorcitiesaredestroyed。somevillagesevendisappearcompletely。
　　step。talking
　　t：earthquakesaredisasterstoeverybody。nowlookatthetwopicturesoftangshanandsanfrancisco。canyoudescribewhatyouseeinthepictures？
　　（showtwopicturestothestudentsandtellthestudentstheyaretoday’stangshanandsanfrancisco。butmanyyearsagosomebigearthquakeshitthesetwobeautifulcities。）
　　1。showthepicturesofsanfranciscotothestudentsandletthemdescribetoday’ssanfranciscoandthenletthemknowwhathappenedinsanfranciscoin1906
　　（fromthepictureofsanfrancisco，wecanseeitisaverybigcity。therearemanytallbuildingsthicklystandingontheearth。andthepopulationofthecityisverylarge。）
　　2。showthepicturesoftangshantothestudentsandletthemdescribetoday’tangshanandthenletthemknowwhathappenedintangshanin1976。
　　（today’tangshanisabeautifulcity。ithasbeautifulgardens，broadroadsandsometallbuildings。）
　　t：but，whatwillhappeniftherehasbeenabigearthquakeinthesetwocities？workingroupsanddiscussit。theni’llasksomeofyoutosayoutyouropinion。
　　（aftertheterriblequake，everythingisdestroyed，whatwecanseeisfallenbuildingsanddeadbodies。thepolicemen，thesoldiersandsomeothervolunteersarerescuingthepeopletrappedintheruins。）
　　t：right，nowlet’sseeafilm。
　　（letthestudentsseeafilmabouttangshanearthquake。）（film）
　　t：aftertheearthquakethecityoftangshanbecame。。
　　letthestudentsdiscusswhattheysaw。andthentalkaboutthepicturesintheirownwords。
　　thehouse。
　　thefire。
　　thebridge。
　　theroad
　　thepoliceandthevolunteers。
　　thepeople。。
　　（tangshanearthquakehappenedonjuly28，1976。itwasthegreatestearthquakeofthe20thcenturyinchina。beforetheearthquake，manystrangethingshappened，butpeoplethoughtlittleofthem。suchagreatnumberofpeoplediedduringtheearthquake，becausethequakehappenedwhiletheyweresleeping。thenumberofpeoplewhowerekilledorinjuredreachedmorethan400，000。andallthetrafficwasalmostdestroyedafterthequake。thousandsofthousandsofpeoplebecamehomelessinashorttime。manysoldiersweresenttotangshantorescuethesurvivorsaftertheearthquake。
　　letthestudentstalkaboutthedamagecausedbyearthquakes
　　usingthefollowingwordsandphrases：
　　shake，break，falldownonto，hurt，destroy，homeless，die。。
　　step。prereading
　　t：butwecanavoidoratleastreducethelosscausedbyearthquakes。andwecanforetellit。
　　doyouknowwhatwouldhappenbeforeanearthquake？
　　canwedosomethingtokeepourselvessafefromearthquakes？
　　（1。thereisoftenagreatsound。
　　2。animalsmaybetoonervoustoeat。
　　3。maybetherearebrightlightsinthesky。
　　4。asmellygasmaycomeoutofthewell。
　　5。inthecitythewaterpipesinsomebuildingscrackandburst。
　　6。scientistshavestudiedearthquakesandmakemapsthatshowtheearthquakebelts。inareasinthesebelts，itispossibleforearthquakestohappen。intheseareaswecanbuildstronghousestofightagainstearthquakes。）
　　discussionamp；activities
　　1。showsomepicturestothestudentsand
　　letthemdiscuss。
　　letthestudentslookatthemanddecide
　　whatsituationmayhappenbeforean
　　earthquake。
　　2。thenfillinthemissingwords
　　accordingtothepictures。
　　a。thewaterinthewellsand。andsomedeepcouldbeseeninthewellwalls。agascameoutthecracks。
　　b。miceranoutthefieldsplacestohide。fishoutofbowsandponds。
　　c。thechickensandevenpigswerenervouseat。thedogwasloudlyagainandagain。
　　d。peoplecouldseelightsinthesky。
　　3。letthestudentsdiscussiftheyhaveeverexperiencedanearthquake。
　　stepdiscussionamp；activities
　　t：whatdoyouthinkmayhappenbeforeanearthquake？
　　（beforeanearthquake，animalswillbecomenervous。cow，pigs，，horsesanddogswillbeupset。andpeoplecanseemicerunningabout。iftheearthquakehappensduringwinter，peoplecanevenseesnakes。）
　　t：haveyoueverexperiencedanearthquake？
　　letthestudentsdiscussandthentalkaboutit。
　　stephomework
　　previewreadingmaterialandthendoexerciseonpage27。13（incomprehending）