Unit 5 Revealing nature Understanding ideas 教案-2022-2023学年高二英语外研版2019选择性必修第一册

Unit5RevealingnatureUnderstandingideas教学设计科目：英语课题：Understandingideas课时：1课时教学目标与核心素养：知识目标：学生细读课文获取课文的主旨大意；叙述类文本的结构及语言特点，并按照事件发展顺序梳理Darwin的发现之旅能力目标：学生阅读课文，在语篇中学习和掌握与话题相关的词汇，并能运用所学词汇进行交流情感目标：学生联系生活实际，学习科学家的创新精神，并运用到自己的学习和生活中去教学重难点教学重点：带领学生通过略读和精读，获取课文大意，引导学生感知课文的结构和语言教学难点：学生总结生物进化对于人类的意义课前准备：多媒体，黑板，粉笔教学过程：一、Pre-class1.Greeting2.Leading-in关于达尔文的背景信息CharlesDarwinandhisTheoryofEvolutionCharlesDarwin(1809–1882)wasanEnglishgeologistandnaturalist.InhisfamousbookOntheOriginofSpecies,Darwinproposedthetheorythatorganisms(individuallifeforms)evolveextremelyslowly.Hestatedthattheorganismsthatwerebettersuitedtotheirenvironmentswouldsurviveandpassontheirfavorablecharacteristicstothenextgeneration,whilethelesssuitableorganismswouldgraduallydieout.Hecalledthisprocess"naturalselection".学生活动：学生完成活动1。Lookattheevolutionarytreeandanswerthequestions.1Whatspeciesdoyourecogniseinthepicture?2Whatfactorscancausetheprocessofevolution?学生分组，进行小组讨论，尝试回答问题。参考答案：1Paramecium,earthworm,snail,crab,fish,tortoise,bird,horse,human,frog,algae,moss,fern.…2Students'ownanswers.二、While-class学生活动：完成活动2。Readthepassageandtalkaboutyourunderstandingofthetitle.教师以问题为导向，引导学生带着任务阅读课文，理解课文。学生分组，讨论对课文标题的理解。文章句子分析课文注释1What'smore,hehadrecentlyreceivedaletterfromhisfatherpredictingthathewouldbe"adisgracetoyourselfandallyourfamily".Paraphrase:Besides,hehadreceivedaletterfromhisfather,inwhichhisfathersaidthathewouldnotonlymakehimselfbutalsothewholefamilyfeelashamed.教师着重引导学生理解非谓语动词predicting的用法。predicting在此处作定语，解释说明前面名词letter的内容。此外，教师应提醒学生注意adisgraceto...这个固定搭配，该搭配意为tohaveaverybadeffectontheopinionthatpeoplehaveofyourfamilyorthegroupthatyoubelongto。2...Darwinsawavarietyofnewspecies,butitwasthebirdsthatinterestedhimthemost.Paraphrase:Amongalldifferentkindsofspecieshesaw,Darwinwasmostinterestedinthebirds.本句中的avarietyof是固定搭配，意为“各种各样的”，教师可引导学生关注第二段，从该段中找出一个和此搭配意思相同的词，即various，并提醒学生various是variety的形容词形式，表达differentkindsof这个意思时，avarietyof和various可以互换。例如:Ourschoolprovidesavarietyof/variousafter-classactivitiesforthestudents.(我们学校为学生提供多种多样的课外活动。)另外，教师引导学生关注but后面的句子，该句使用了英语中的常见句式——强调句,基本结构为：Itis/was...that/who....例如：Itwasontheship,theBeagle,thatDarwinstudiedavarietyofspecies.(Darwin是在名为theBeagle的船上对多种物种进行了研究。）3Itwasnotpublisheduntil1859andimmediatelycausedastorm.Paraphrase:Onlyin1859didthebookcomeoutandatonceitcausedagreatsensation.教师引导学生关注表达causedastorm，本意是“引起风暴”，这里取其引申义，即“引起轰动”。例如：Thenewspaperisinitsdecliningyears.Theydon'tcare;theyquiteliketocauseastorm.（这家报纸正在走下坡路，他们豁出去了，一心只想制造轰动。）4ButDarwin'sscientificstudiesweresoconvincingthatmoreandmorepeoplestartedtobelievehistheory.Paraphrase:Hisscientificstudiesprovidedstrongevidencesothatagrowingnumberofpeoplebegantoaccepthistheory.此处convincing意为makingyoubelievethatsomethingistrueorright。例如：Thereisconvincingevidencethatsmokingcauseslungcancer.(有令人信服的证据表明吸烟导致肺癌。）教师还可以补充与动词convince有关的一个短语convincesb.ofsth.。例如：I'mconvincedofhishonesty.（我确信他是诚实的。）学生活动：完成活动3。Choosethemainideaofthepassageandgiveyourreasons.1Darwin'sinterestinvariouslivingthingsmadehimagreatnaturalist.2Darwin'sjourneyontheBeagleinspiredhisTheoryofEvolution.3Darwinwentonajourneytoconfirmhistheorythathumanshadevolvedovertime.参考答案：2学生活动：完成活动4。Numberthepuzzlepiecesinorder.Organiseinformationfromthepassageandcompletethem.第一步：根据文章的主要内容，教师组织学生讨论以下两个问题：1.Howdoestheauthororganisethepassage?2.DrawtheroutemapofDarwin'sjourneyingroups.第二步：学生分组，讨论Darwin发现之旅的时间线索，并对puzzlepieces进行排序。第三步：请学生精读课文，找出课文中相应的细节内容，完成puzzlepieces。第四步：请学生根据时间线索及细节信息，组内讨论并复述Darwin的发现之旅，并将复述内容写出来。参考答案1Onhisjourney•Darwinstudiedvariouslivingthingsintheirnaturalenvironmentsandsamplesoftheplantsandanimalshehadcollected.•Henoticedthatsomespeciesofanimalswereverysimilartoeachother.2GenerateideasDarwinaskedthequestions:•Howdiddifferentspeciescometoexist?•Maybeanimalsevolvedastheyadaptedtotheirchangingenvironments?3LookformoreevidenceOntheGalápagosIslands:•Henoticedthattherewasadifferencebetweenthefinchesoneachoftheislands.•Itseemedthebeakshadevolvedaccordingtowhatfoodwasavailableonthatparticularisland.4DevelopideasDarwinsuspectedthatthefincheshadevolvedfromacommonancestor,whichhadarrivedontheislandsalongtimebeforeandithadslowlyevolvedintomanynewspecies.5ProposeatheoryTheTheoryofEvolution:livingthings,includinghumans,hadevolvedfromlowerformsoflife.三、After-classThink&share1Whyweremanypeople"shocked"byDarwin'stheory?2WhatkindofpersonwasDarwinaccordingtothepassage?3Howdoyouthinkthehumanspecieswillevolveinthefuture?4Whathaveyoulearntaboutthespiritofscientificexploration?Howcanthisspirithelpyouinyourlifeandstudies?学生分组讨论本环节问题的答案。必要时，教师可以补充更多背景知识。参考答案1Atthattime,peoplebelievedthatallspecieshadappearedonEarthatthesametimeandhadnotchangedsince,butDarwin'stheoryproposedthatlivingthings,inclu