Unit5 Starting out and Understanding ideas 名師教學(xué)設(shè)計(jì)

2/2Unit5Startingout&Understandingideas名師教學(xué)設(shè)計(jì)課時(shí)內(nèi)容：本課時(shí)包括Startingout和Understandingideas兩部分。Startingout是導(dǎo)入部分，包括閱讀雜志頁回答問題和觀看視頻回答問題兩個(gè)環(huán)節(jié)。通過觀察雜志中提到的現(xiàn)如今罕見的三種動(dòng)物，將學(xué)生的思維拉到關(guān)于動(dòng)物的思考，貼近單元話題。通過觀看視頻，了解不同植物種子的傳播途徑，進(jìn)一步了解神奇的大自然。Understandingideas部分講述了英國地質(zhì)學(xué)家和博物學(xué)家達(dá)爾文的發(fā)現(xiàn)之旅。達(dá)爾文乘坐貝格爾號進(jìn)行了歷時(shí)5年的環(huán)球航行，對動(dòng)植物和地質(zhì)結(jié)構(gòu)等進(jìn)行了大量的觀察和采集。1859年，達(dá)爾文出版了《物種起源》，提出了生物進(jìn)化論學(xué)說。除了生物學(xué)外，達(dá)爾文的理論對人類學(xué)、心理學(xué)、哲學(xué)的發(fā)展都有不容忽視的影響。課時(shí)目標(biāo)：1.認(rèn)知并靈活運(yùn)用本課時(shí)的重點(diǎn)單詞distant、disgrace、evolve、suspect、evolution、generate和短語answerthecall，beadisgrace、datebackto、ofalltime、befascinatedby、becrowdedwith、cometoexist、besimilarto、adaptto、avarietyof、accordingto、evolveinto、beregardedas等2.通過速讀、精讀等方式，引導(dǎo)學(xué)生由淺入深，逐層推進(jìn)，加深對文章的理解，并掌握不同的閱讀技巧和方法。通過對所設(shè)置題目的解答，讓學(xué)生學(xué)會根據(jù)關(guān)鍵詞提取重要信息，理清文章線索，并學(xué)會深層次分析問題，進(jìn)行語言加工，提高歸納、概括、推理判斷的能力。3.通過閱讀文章，感受達(dá)爾文探索科學(xué)、追求真理之路的艱辛，學(xué)習(xí)他不畏困難、大膽質(zhì)疑、勇于探索的精神。重點(diǎn)難點(diǎn)：重點(diǎn)：學(xué)習(xí)、掌握本課的重點(diǎn)單詞distant、disgrace、evolve、suspect、evolution、generate和短語answerthecall、beadisgrace、datebackto、ofalltime、befascinatedby、becrowdedwith、cometoexist、besimilarto、adaptto、avarietyof、accordingto、evolveinto、beregardedas等，并能在具體語境中靈活運(yùn)用。難點(diǎn)：1.通過解決閱讀階段所設(shè)置的題目，學(xué)會分析問題、解決問題，理清文章脈絡(luò)，提高閱讀水平。2.通過閱讀文章，學(xué)會善于觀察，認(rèn)真思考，激發(fā)探索自然的興趣。教學(xué)準(zhǔn)備：教師準(zhǔn)備：1.準(zhǔn)備好該部分內(nèi)容的視頻材料、PPT以及音頻素材。2.設(shè)計(jì)好閱讀理解題目，利用不同方式拓展語言點(diǎn)，激發(fā)學(xué)生興趣。學(xué)生準(zhǔn)備：1.在網(wǎng)上搜索了解科莫多巨蜥、鴨嘴獸、鸚鵡螺的相關(guān)信息，并查找不同植物種子的傳播途徑，更進(jìn)一步了解大自然的奧秘。2.了解達(dá)爾文的生平事跡及其所取得的成就。3.預(yù)習(xí)Startingout和Understandingideas兩部分的內(nèi)容，通過查字典等方式提前解決詞匯問題。教學(xué)過程：StepIStartingout1.Lookatthepagefromasciencemagazineandanswerthequestions.·Whatdoyouknowabouttheseanimals?Whatmakesthemspecial?·whatothersimilaranimalsdoyouknowabout?Shareyourknowledgewiththeclass.2.Watchthevideoandanswerthequestions.·Howcanseedstravel?Howcanthisbenefitplants?·Canyouthinkofanotherexampleofseedstravelling?Shareitwiththeclass.Suggestedanswers：·Seedsareusuallycarriedbythewind，water，andanimals.Plantscanhaveabetterchanceatlife.·（略）.【設(shè)計(jì)意圖】通過看一頁科學(xué)雜志和視頻，讓學(xué)生初步了解本單元內(nèi)容，為接下來的學(xué)習(xí)做鋪墊。StepIIReading1.Pre-reading.(1)Lookattheevolutionarytreeandanswerthequestions.·Whatspeciesdoyourecogniseinthepicture?·Whatfactorscancausetheprocessofevolution?Suggestedanswers：·Paramecium，earthworm，snail，crab，fish，tortoise，bird，horse，human，frog，algae，moss，fern...·（略）（2）Readthepassageandtalkaboutyourunderstandingofthetitle.【設(shè)計(jì)意圖】通過觀察進(jìn)化樹，引發(fā)學(xué)生對影響進(jìn)化因素的思考。通過觀察文章標(biāo)題，預(yù)測文章內(nèi)容，為后面文章的學(xué)習(xí)奠定基礎(chǔ)。2.Fastreading.Readthepassagequicklyandfinishthefollowingexercises.(1)Matchthepartswiththemainideas.①Part1(Paras.1~2)_________________________________________________②Part2(Paras.3~5)_________________________________________________③Part3(Para.6)____________________________________________________④Part4(Para.7)____________________________________________________A.TheremarkaboutOntheOriginofSpecies.B.Darwin’snewtheoryaboutevolution.C.Thenewdiscoveriesduringthejourney.D.Darwinansweredthecallandbeganhisjourney.Suggestedanswers：①D②C③B④A(2)Choosethebestanswers.①Whydidn’tthecaptainoftheBeaglethinkDarwinwasthebestchoice?A.BecauseDarwinwasn’tadmittedtoauniversity.B.BecauseDarwinwasdismissedfrommedicalschool.C.BecauseDarwinbroughtshametohimselfandhisfamily.D.BecauseDarwinhadnotenoughinterestinvisitingdistantcountries.②Whatdidpeoplethinkaboutthespeciesatthattime?A.Allspeciesevolvedfromthesamespecies.B.Allspeciescameintobeinginthemeantime.C.Somespeciesappearedearlierthantheothers.D.Somespeciesimprovedalotsinceitsappearance.③WhatwasDarwin’snewtheorythen?A.Environmentplayedanimportantrole.BSpeciesevolvedwiththechangingenvironment.C.Differentspecieslivedindifferentenvironment.D.Themorecomplicatedthespecieswere,themoretimeittook.④HowdidpeoplefeelDarwin’stheory?A.Astonished.B.Excited.C.Satisfied.D.Interested.Suggestedanswers：①B②B③B④A【設(shè)計(jì)意圖】通過選取段落大意和選擇題環(huán)節(jié)，進(jìn)一步鍛煉學(xué)生回扣原文，提取關(guān)鍵信息的能力。3.Carefulreading.（1）Languagepoints.Masterthewordsandphrases：distant，disgrace，evolve，suspect，evolution，generate，answerthecall，beadisgrace，datebackto，ofalltime，befascinatedby，becrowdedwith，cometoexist，besimilarto，adaptto，avarietyof，accordingto，evolveinto，beregardedas【備注】詞匯知識點(diǎn)講解詳見第二教案“新知探究”。（2）Readthepassageagainandretellit.【設(shè)計(jì)意圖】通過設(shè)置該活動(dòng)，進(jìn)一步歸納、概括文章，理清文章脈絡(luò)，有助于學(xué)生更好地加深對文章的理解。同時(shí)，在讀懂語篇的基礎(chǔ)上，將英語語法、句法、詞匯的學(xué)習(xí)融合在一起，更科學(xué)地反映學(xué)生的口頭表達(dá)能力和英語綜合素養(yǎng)。4.Post-reading.(1)DoActivity3onPage52.Choosethemainideaofthepassageandgiveyourreasons.①Darwin’sinterestinvariouslivingthingsmadehimagreatnaturalist.②Darwin’sjourneyontheBeagleinspiredhisTheoryofEvolution.③Darwinwentonajourneytoconfirmhistheorythathumanshadevolvedovertime.Suggestedanswers：②【設(shè)計(jì)意圖】以選擇題的形式呈現(xiàn)，讓學(xué)生選出文章的主旨大意，鍛煉學(xué)生獲取關(guān)鍵信息、歸納問題的能力。（2）DoActivity4onPage52.□ONHISJOURNEY·Darwinstudied___________.·□ONHISJOURNEY·Darwinstudied___________.·Henoticedthatsomespeciesofanimalswere___________.□DEVELOPIDEASDarwinsuspectedthatthefinches______andithad_______.□PROPOSEATHEORYTheTheoryofEvolution：livingthings,includinghumans,_______.□GENERATEIDEASDarwinaskedthequestions：·Howdiddifferentspecies______？·______________________.□LOOKFORMOREEVIDENCEOntheGalapagosIsland：·Henoticed_______________.·Itseemedthebeaks________.Suggestedanswers：eq\o\ac(□,1)ONHISJOURNEYvariouslivingthingsintheirnaturalenvironmentsandsamplesoftheplantsandanimalshehadcollected;verysimilartoeachothereq\o\ac(□,2)GENERATEIDEASccometoexist;Maybeanimalsevolvedastheyadaptedtotheirchangingenvironments?eq\o\ac(□,3)LOOKFORMOREEVIDENCEthattherewasadifferencebetweenthefinchesoneachoftheislands;hadevolvedaccordingtowhatfoodwasavailableonthatparticularislandeq\o\ac(□,4)DEVELOPIDEAShadevolvedfromacommonancestor,whichhadarrivedontheleislandsalongtimebefore;slowlyevolvedintomanynewspecieseq\o\ac(□,5)PROPOSEATHEORYhadevolvedfromlowerformsoflife【設(shè)計(jì)意圖】通過該活動(dòng)，將達(dá)爾文得出進(jìn)化論的過程形象地呈現(xiàn)出來，有助于學(xué)生理清文章主線、獲取關(guān)鍵信息。通過原文定位法，找到問題的答案。本題打亂了順序，要求學(xué)生重新整理排列，鍛煉學(xué)生的邏輯思維能力。（3）DividestudentsintosmallgroupsandaskthemtodiscusswhyDarwindidnotpublishhisTheoryofEvolutionuntil1859，abouttwentyyearsafterhisdiscovery.StepⅢSummingup1.總結(jié)本節(jié)課的重點(diǎn)詞匯distant、disgrace、evolve、suspect、evolution、generate、answerthecall、beadisgrace、datebackto、ofalltime、befascinatedby、becrowdedwith、cometoexist、besimilarto、adaptto、avarietyof、accordingto、evolveinto、beregardedas和句型，采用表格、思維導(dǎo)圖等形式更清晰地了解它們的用法，形成知識脈絡(luò)。2.讓學(xué)生用簡短的英語簡述達(dá)爾文的發(fā)現(xiàn)之旅，進(jìn)一步鍛煉學(xué)生概括、歸納的能力。3.通過對達(dá)爾文發(fā)現(xiàn)生物進(jìn)化論的了解，學(xué)習(xí)他細(xì)致入微的觀察