高中英语-Unit4Astronomythe science of the stars教学设计学情分析教材分析课后反思

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(语篇标志词)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,…havebecome….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.本文是一篇科普类文章，文中有许多专有名词，如两栖动物、水生有壳动物、爬行动物。因此单词必须先巩固，同时学生可将英文所呈现的内容与生物知识相结合，这样可以使文章的脉络更加清晰。学生上完本节课后，能够对地球上生命的起源有了直观、清晰的认识。而且通过最后讨论环节“如何保护地球”，学生意识到保护地球迫在眉睫，保护地球人人有责。Whetherlifewillcontinueontheearthdependsonus.Onlyifwecarewillwehelp,onlyifwehelpcanwesavetheearth.从教材整合上来说，reading部分是本单元的中心环节，它既是本单元的基本语言内容，又为本单元后面的知识拓展和综合语言运用奠定了基础。Reading部分讲述了地球上生命的起源，所使用的文体是说明文。正文共分五段，除第一段“引入”和最后一段“结语”以外，其余三段都是集中在“生命起源”这一主题上。文章介绍了“宇宙大爆炸”使得宇宙中的物质四分五裂，进而形成原子，原子的形成与结合就形成了各种星球以及固态物体，在这个过程中地球产生了，但是水的形成使得地球有别于其他星球，它使得地球上生命的诞生成为可能。科学家认为，地球上的生命诞生于水中，上百万年后，陆地上才长出绿色植物，随后出现了陆栖动物和水陆两栖动物。最初的动物靠孵化卵繁衍后代，后来出现了哺乳动物。文章最后讲述的现象发人深省：...theearthmaybecometoohottoliveon.它关系到地球上生命的未来。教学的重点：本篇课文整体阅读阅读量正常，难易度适中，因此将重点放在对文章的理解上，特别是在阅读中如何摄取信息、分析信息、解决信息背后的意义上。教学的难点:1.掌握文章的主旨大意，整理出关于文章结构的主要信息。2.展现并提高学生的语言表达能力。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.高一学生对新教材以及本单元内容虽然有一定的了