Scientists at work教案1

教学示例（二）
i.teachingaims:
talkaboutscienceandscientists.
learnhowtogiveinstructions.
similardialoguepresentationwithnewwordsandexpressionsusedwithin
ii.teachingaids:taperecorder,pictures,slides
step1pre-reading
1.taskss:doyouknowthenamesofsomefamousscientists?
whataretheyfamousfor?
tshowsomepicturesandask:doyouknowthescientists?whataretheyfamousfor?
              
alberteinstein爱因斯坦galileogalilei伽利略mariecurie居里夫人
         
stephenhawking    charlesdarwin达尔文   yuanlongping袁隆平
史蒂芬•威廉姆•霍金
2.groupwork
letssworkinpairs,andnamesomescientistswhomademanyimportantdiscoveriesintheeighteenthandnineteenthcenturies.(slideshow)
stepii.reading
1.skimming  letssreadthepassagecarefullyandanswerthequestion:
whydidbenjaminfranklindothisexperimentwiththekite?
(hewantedtoshow/provethatlightningandelectricityarethesamething.)
2.skipping letssreadthepassageagain,andfinishthefollowingexercises:(slideshow)
true(t)orfalse(f)
1.in1752scientistsalreadyknewwhatelectricityis.(t)
2.franklinwashelpedbyafriendtodotheexperiment.(f )
3.franklinmadethekiteofsilkbecausewetsilkdoesnotconductelectricity.(f )
4.acondenserwasusedintheexperimenttostoreelectricity.( t)
5.thekeytiedtothestringwasputintothedoortostopthekiteformflyingaway.(f )
3.extractivereading  letssreadthepassagecarefully,andanswerthefollowingthequestions:
a.whyisitbettertomakethekiteofsilkthanofpaper?
(aslikkitewilllastlongerinbadweatherthanapaperkite.)
b.doyouthinkfranklin’sexperimentwasdangerous?explain.
(yesfranklin’sexperimentwasverydangerousbecauseifsomethingwentwronghecouldbekilledbythelightning.)
4.letssfindoutthekeysoftheexercisesaftertheirreading.(slideshow)
aim:toshowthatlightningandelectricityarethesame.
materials:somewoodensticks,apieceofsilk,somerope,averysharppieceofmetal,asilkribbon,akey,acondenser,asmallshed,athunderstormwithlightning.
results:theelectricitystoredinthecondensercanbeusedtodootherexperiments,whichprovesthatlightningandelectricityarethesame.共3页，当前第1页123