高中英語-Unit4Astronomythe science of the stars教學(xué)設(shè)計學(xué)情分析教材分析課后反思

Book3Unit4Astronomy:thescienceofthestarsReadingHowLifeBeganontheEarthStepone:Leading-inWatchavideo“HowLifeBegan”toleadinthetext.Steptwo:FastreadingThistextcanbedividedintotwostagesStage1:(para____----_____)Thedevelopmentoftheearth.Stage2:(para____----_____)Thedevelopmentoflifeontheearth.Stepthree:CarefulreadingStage1:Thedevelopmentoftheearth.Dothefollowingexercises:1.Accordingtoawidelyacceptedtheory,theuniversebeganwith________________.2.AftertheBigBang,theearthwasstilljust________________________.3Between4.5and3.8yearsagothedustsettledinto_____________________.4.Whathappenednext?5.Whatappearedastheearthcooleddown?6.Whywaswaterfundamentaltothedevelopmentoflife?Stage2:Thedevelopmentoflife.1.Underlinethefollowingdiscoursemarkers(語篇標(biāo)志詞)inyourbook：thefirst,thelater,Next,befollowedby,Others,Later,Afterthat,However,Finally,Thus.2.Learnthedevelopmentoflifeaccordingtothesediscoursemarkers.Manymillionsofyearslater,thefirst……encouragedthelater…Next…befollowedby...Others…liveonlandaswellasinthewaterLaterwhentheplantsgrewintoforests,....appeared...Afterthat,…developed.However,65millionyearsago,…ended.…madepossibletheriseof...Finally2.6millionyearsago,somesmallcleveranimals…appearedandspread…Thus,intheirturn,…h(huán)avebecome….Stepfour:Fillintheblanksaccordingtothetext.Accordingtoawidelyacceptedtheory,theuniversebeganwitha___________.Afterthe“BigBang”,theearthwasstilljust________________.Thenbetween4.5and3.8billionyearsago,thedustsettledinto_____________.Itexplodedloudlywithfireandrock,whichwere__________toproducegasesandwater.Waterwastobe____________tothedevelopmentoflife.Manymillionsofyearslater,_____________begantoappearonthesurfaceofthewater.Laterwhentheplantsgrewintoforests,_______appearedforthefirsttime.Theyproducedyounggenerallyby________eggs.Whendinosaursdisappeared,_________becamemoreimportant.Finallyabout2.6millionyearsagosomesmallcleveranimalsnowwith________________appearedand_______allovertheworld.They’reputtingtoomuch______________intotheatmosphere,which________heat______escapingfromtheearthintospace.Whetherlifewillcontinueonearthformillionsofyearstocomewill____________whetherthisproblemcanbesolved.Stepfive:Analyzethedifficultsentence.Whetherlifewillcontinueontheearthformillionsofyearstocomewilldependon（）whetherthisproblemcanbesolved.（）Translation:Stepsix:Discussion:Howtosolvetheproblemofpollution?Asyoungpeople,whatlittlethingscanwedofortheearth?Stepseven:Homework:Writeanarticleabouthowtosaveourearth.本文是一篇科普類文章，文中有許多專有名詞，如兩棲動物、水生有殼動物、爬行動物。因此單詞必須先鞏固，同時學(xué)生可將英文所呈現(xiàn)的內(nèi)容與生物知識相結(jié)合，這樣可以使文章的脈絡(luò)更加清晰。學(xué)生上完本節(jié)課后，能夠?qū)Φ厍蛏仙钠鹪从辛酥庇^、清晰的認(rèn)識。而且通過最后討論環(huán)節(jié)“如何保護地球”，學(xué)生意識到保護地球迫在眉睫，保護地球人人有責(zé)。Whetherlifewillcontinueontheearthdependsonus.Onlyifwecarewillwehelp,onlyifwehelpcanwesavetheearth.從教材整合上來說，reading部分是本單元的中心環(huán)節(jié)，它既是本單元的基本語言內(nèi)容，又為本單元后面的知識拓展和綜合語言運用奠定了基礎(chǔ)。Reading部分講述了地球上生命的起源，所使用的文體是說明文。正文共分五段，除第一段“引入”和最后一段“結(jié)語”以外，其余三段都是集中在“生命起源”這一主題上。文章介紹了“宇宙大爆炸”使得宇宙中的物質(zhì)四分五裂，進而形成原子，原子的形成與結(jié)合就形成了各種星球以及固態(tài)物體，在這個過程中地球產(chǎn)生了，但是水的形成使得地球有別于其他星球，它使得地球上生命的誕生成為可能?？茖W(xué)家認(rèn)為，地球上的生命誕生于水中，上百萬年后，陸地上才長出綠色植物，隨后出現(xiàn)了陸棲動物和水陸兩棲動物。最初的動物靠孵化卵繁衍后代，后來出現(xiàn)了哺乳動物。文章最后講述的現(xiàn)象發(fā)人深省：...theearthmaybecometoohottoliveon.它關(guān)系到地球上生命的未來。教學(xué)的重點：本篇課文整體閱讀閱讀量正常，難易度適中，因此將重點放在對文章的理解上，特別是在閱讀中如何攝取信息、分析信息、解決信息背后的意義上。教學(xué)的難點:1.掌握文章的主旨大意，整理出關(guān)于文章結(jié)構(gòu)的主要信息。2.展現(xiàn)并提高學(xué)生的語言表達(dá)能力。Fillintheblanksaccordingtothetext.Accordingtoawidelyacceptedtheory,theuniversebeganwitha___________.Afterthe“BigBang”,theearthwasstilljust________________.Thenbetween4.5and3.8billionyearsago,thedustsettledinto_____________.Itexplodedloudlywithfireandrock,whichwere__________toproducegasesandwater.Waterwastobe____________tothedevelopmentoflife.Manymillionsofyearslater,_____________begantoappearonthesurfaceofthewater.Laterwhentheplantsgrewintoforests,_______appearedforthefirsttime.Theyproducedyounggenerallyby________eggs.Whendinosaursdisappeared,_________becamemoreimportant.Finallyabout2.6millionyearsagosomesmallcleveranimalsnowwith________________appearedand_______allovertheworld.They’reputtingtoomuch______________intotheatmosphere,which________heat______escapingfromtheearthintospace.Whetherlifewillcontinueonearthformillionsofyearstocomewill____________whetherthisproblemcanbesolved.高一學(xué)生對新教材以及本單元內(nèi)容雖然有一定的了