【新教材】译林版（2024）八年级上册英语Unit 7 The natural world单元课时教案

第第页【新教材】译林版（2024）八年级上册英语Unit7Thenaturalworld单元课时教案单元整体教学设计单元主题本单元主题为“Thenaturalworld”（自然世界），属于“人与自然”范畴，涉及“自然生态与环境保护”主题群，聚焦“生态系统、生物多样性、环境保护”子主题。单元内容分析本单元围绕“自然世界”这一主题展开，由七个板块组成。单元首页明确四项学习目标：阅读关于不同生态系统的文章、了解保护生态系统、就如何保护生态系统提出建议、更好地理解保护生态系统的重要性。Welcometotheunit板块围绕“生态系统”展开，通过阅读关于雨林、珊瑚礁、草原和冰原的有趣事实，以及David与Kitty关于草原和沙漠的课堂对话，帮助学生初步了解不同生态系统的特点和差异，激发对“自然世界”话题的兴趣。该板块作为单元开篇，为后续学习奠定话题基础。Reading板块为一篇关于地球三大生态系统——海洋、湿地和森林的说明文。文章从生态系统的定义写起，依次介绍了海洋（覆盖71%地表、产生70%氧气、被称为地球的“心脏”）、湿地（覆盖6%地表、养育40%物种、净化水源、防洪、被称为地球的“肾脏”）和森林（覆盖近三分之一陆地、吸收二氧化碳、净化空气、被称为地球的“肺”）的功能和重要性。文章运用比喻（“心脏”“肾脏”“肺”）形象地说明三大生态系统的功能，结构清晰，语言简洁。本板块分两课时教学，第一课时侧重语篇理解、信息梳理和比喻修辞的感知，第二课时侧重语言赏析、结构分析和表达运用。Grammar板块包含两个语法项目。A部分围绕“动词及句子结构”展开，介绍双宾语结构（S+V+O间接+O直接）和宾语补足语结构（S+V+O直接+C），并配有结构识别练习。B部分围绕连词and、but、or、so的用法展开，呈现如何用连词连接并列成分和分句，并配有句子合并练习。WordPower呈现后缀-ly的构词法，包括形容词→副词（real→really、slow→slowly）和名词→形容词（friend→friendly、love→lovely）两种变化，通过短文填空和写作练习巩固运用。该板块整合至Grammar课时末尾教学。Integration板块整合多项技能，分为两课时教学：第一课时聚焦IntegrationA-C，包含阅读（扎龙自然保护区的介绍）、听力（盐城自然保护区的介绍、保护湿地的专家讲座）和口语（Daniel与Amy讨论如何保护森林），侧重听说读技能整合与湿地保护探讨；第二课时聚焦IntegrationD，专项开展写作教学，围绕“保护生态系统”主题，借助写作提纲、范文和写作指导，引导学生完成倡议书写作。Assessment板块包含学生自我评价量表，从四个维度引导学生反思单元学习成果。Furtherstudy推荐观看纪录片《中国湿地》，了解中国湿地的保护成效。两个板块均不单独占用课时，由学生在课后自主完成。七个板块从“感知生态系统多样性”到“认识三大生态系统的功能”，从“学习语法工具”到“了解湿地保护案例”，最后“综合撰写保护倡议书”，层层递进、螺旋上升，构成“感知→理解→内化→整合→表达”的完整学习链。学生在丰富的主题语境中学习语言知识、发展语言技能、认识自然规律，最终通过倡议书写作实现综合语言输出，将语言学习与生态教育、公民意识培养有机融合。体现单元核心素养综合表现的重点语言表达如下。【描述生态系统特征】Theoceancoversaround71%oftheearth‘ssurface.Wetlandsarehometoaround40%ofallthetypesofplantsandanimals.Forestsmakeupnearlyathirdoftheearth’slandarea.【描述生态功能】Theoceanproducesabout70%oftheearth‘soxygen.Wetlandshelpgetridofpollutionandmakethewaterclean.Foreststakeincarbondioxideandproduceoxygen.【使用比喻】Theoceanislikethe“heart”oftheearth.Wetlandsactlikethe“kidneys”oftheearth.Forestsarethe“lungs”oftheearth.【使用比喻】Theoceanislikethe“heart”oftheearth.Wetlandsactlikethe“kidneys”oftheearth.Forestsarethe“lungs”oftheearth.【连词运用】Thedesertishot,dryandcoveredbysand.Thiskindoffishcanfindenoughspacehere,buttheycanfindlittlefood.Birdscanliveintheforestorinthewetland.Desertsaredry,sosomeplantskeepwaterintheirleaves.【描述保护措施】Governmentscanmakelawstostoppeoplefrombuildingonwetlands.Weshouldnotthrowrubbishinforests.Wecanuseenvironment-friendlyproducts.【后缀-ly】real→really,slow→slowly,friend→friendly,love→lovely单元教学目标教学目标对应板块/课时本单元学习后，学生能够：1.了解不同生态系统的基本特征和有趣事实，初步感知生态系统的多样性。Welcometotheunit图片、短文、对话阅读关于地球三大生态系统的说明文，理解和梳理海洋、湿地和森林的功能及其比喻意义，认识生态系统的重要性。Reading音频、图片、说明文深入理解双宾语结构（S+V+O间接+O直接）和宾语补足语结构（S+V+O直接+C），掌握连词and、but、or、so的用法，掌握后缀-ly的构词法，在描写自然和生态的语境中内化其用法。Grammar&WordPower表格、短文、自主写作读、听关于扎龙和盐城自然保护区的材料，获取关键信息，理解湿地保护的紧迫性和具体措施。IntegrationA-C音频、短文、对话综合运用话题词汇和语篇结构知识，写一份保护生态系统的倡议书，表达保护自然、珍爱地球的意识和决心。IntegrationD写作提纲、范文、写作板块教学设计Welcometotheunit语篇研读主题和内容：PartA为四则关于生态系统的趣味事实，呈现rainforests（拥有地球上超过一半的动植物物种）、coralreefs（看似岩石但支撑大量生命）、grasslands（常位于沙漠和森林之间）、ice（是北极熊和企鹅的家园）。PartB为Kitty与David关于生态系统的课堂对话，涉及grasslands（内蒙古有马和牛、非洲有狮子和长颈鹿）和deserts（干燥、昼夜温差大、植物储水、动物从植物获取水分）两个生态系统。意义和价值：通过趣味事实阅读和课堂对话，帮助学生初步了解不同生态系统的特征和差异，建立“ecosystem”的基本概念，为后续深入学习三大生态系统奠定认知基础。方式和方法：PartA为事实陈述形式，语言简洁，每条事实突出生态系统的一个显著特征。PartB为课堂讨论语体，运用Doyouknowanythingabout...?、Iknowthat...、Oh,really?等表达，示范如何讨论生态系统的知识。教学设计Period1:WelcometotheunitTopic:FunfactsaboutecosystemsLearningobjectivesBytheendofthisperiod,studentswillbeableto:Understandbasicfactsaboutdifferentecosystemsandidentifytheirkeyfeatures.Usethetargetexpressionstodiscussecosystems.Developinterestinthenaturalworldandecosystemdiversity.TeachingfocusUnderstandingfactsaboutdifferentecosystems.Usingthedialoguemodeltodiscussecosystemknowledge.TeachingdifficultyPronouncingecosystem-relatedvocabularycorrectly（grassland,coralreef,temperature）.Expressingknowledgeaboutecosystemsclearly.TeachingproceduresRevisionLead-inActivity1:“Matchtheecosystem.”Theteachershowsfourpictures（rainforest,coralreef,grassland,ice/snow）.Studentsmatcheachpicturewithitsname.Theteacherthenasks:“Whatdoyouknowabouttheseplaces?Whatanimalslivethere?”Studentssharebriefly.Theteacherintroducestheterm“ecosystem”andsays:“Todaywearegoingtolearnaboutdifferentecosystemsaroundtheworld.”设计意图：用图片匹配激活学生对不同生态系统的已有认知，自然引出单元核心概念“ecosystem”。效果评价：观察学生能否识别四种生态系统并说出一些相关信息。PresentationActivity2:“Funfactsaboutecosystems.”StudentsreadthefactsinPartAandticktheonestheyalreadyknew.Theysharewithapartner:“Whichfactsurprisedyoumost?Why?”Studentsdiscussbriefly.Theteacherchecksthevocabularyandclarifiesanydifficulties.设计意图：通过阅读趣味事实建立对生态系统的基本认识，通过“哪个事实最令人惊讶”引发思考和交流。效果评价：观察学生能否理解事实内容并表达自己的想法。Activity3:“Listenandunderstand.”StudentslistentothePartBdialoguebetweenKittyandDavid.Theyanswer:“WhatdoesDavidknowaboutgrasslands?Whatdoesheknowaboutdeserts?”（Grasslands:differentanimalsindifferentplaces—horses/cowsinInnerMongolia,lions/giraffesinAfrica;Deserts:dry,littlerain,hugetemperaturedifference,plantskeepwater,animalsgetwaterfromplants.）Theteacherhighlightskeyexpressions:“Doyouknowanythingabout...?”,“Iknowthat...”,“Oh,really?”,“Yes,theclimateindesertsissoawfulthat...”设计意图：通过听力获取对话中的生态系统知识，感知和提取谈论生态系统的交际表达。效果评价：观察学生能否准确提取信息并识别关键表达。Theteachercancollectmoresuchcontrastivefactstofurtherstimulatecuriosityaboutecosystems.PracticeActivity4:“Ecosystemexpertcards.”Studentsworkinpairs.EachstudentchoosesoneecosystemfromPartAandwritesdown2-3keyfacts.Theythentaketurnsbeingthe“expert”whiletheirpartnerasksquestions:“Doyouknowanythingabout...?”Theexpertsharesthefacts.Thentheyswitchroles.设计意图：通过“专家卡”活动将听力输入转化为口语输出，在问答中巩固目标表达和生态知识。效果评价：观察学生能否用英语询问和分享生态系统知识。Activity5:“Ecosystemguessinggame.”Theteacherdescribesanecosystemwithoutnamingit.Studentsguesswhichecosystemitis.Forexample:“Thisecosystemhasmanytreesandanimals.Overhalfofallanimalsandplantsonearthlivehere.Whatisit?”（Rainforest.）Thenstudentsworkinpairstocreatetheirowndescriptionsforapartnertoguess.设计意图：用猜谜游戏巩固对生态系统特征的理解，锻炼听信息、抓关键词和描述能力。效果评价：观察学生能否根据描述猜出生态系统，能否创作合理的描述。Ifstudentshavedifficultyrememberingfacts,theycankeeptheircardsopenforreference.Somestudentsgaveonlybriefdescriptionslike“It‘sbig,”lackingkeydistinguishingfeatures.Theteachercanprovideastructuredframeworktohelpthemorganizetheirdescriptions.ProductionActivity6:“OnethingIlearned.”Studentswrite2-3sentencesaboutonenewfacttheylearnedaboutecosystemstoday.Theysharewithapartner.2-3studentssharewiththeclass.设计意图：从口头交流过渡到书面表达，帮助学生巩固和内化新知。效果评价：观察学生能否准确写出新学到的生态系统事实。SummaryTheteacherasks:“Whatecosystemsdidwelearnabouttoday?Whatisoneinterestingfactabouteach?”Studentsanswer.Theteacherconcludes:“Thenaturalworldisfullofamazingecosystems.Inthisunit,wewillexplorethreeofthemostimportantones.”设计意图：回顾本课核心内容，为单元后续学习铺垫。效果评价：观察学生能否说出至少三种生态系统及其特征。HomeworkBasic:ReadthePartBdialoguealoud3times.Finishthevocabularyexercisesintheworkbook.Extended:Findonemoreinterestingfactaboutanecosystemandshareitwiththeclassnexttime.BlackboarddesignUnit7ThenaturalworldWelcometotheunit:FunfactsaboutecosystemsEcosystems:rainforest,coralreef,grassland,iceKeyfacts:Rainforests→overhalfofallanimalsandplantsCoralreefs→supportalotoflifeGrasslands→differentanimalsindifferentplacesIce→polarbearsandpenguinsTalkingaboutecosystems:Doyouknowanythingabout...?Iknowthat...Oh,really?教学反思Activity2的“最令我惊讶的事实”讨论中，珊瑚礁“看似岩石但支撑大量生命”引发了最多讨论，说明学生对这类“反差型”事实兴趣浓厚。后续可补充更多此类趣味事实。Activity5的猜谜游戏中，部分学生只用了简单描述（如“It’sbig.”），缺乏关键特征信息。后续可提供描述框架（“Thisecosystemhas...Itishometo...”），帮助学生组织更完整的信息。Reading语篇研读主题和内容：本课语篇为一篇关于地球三大生态系统——海洋、湿地和森林的说明文。文章首先定义“生态系统”——包含一个区域内所有生物和非生物事物，可大可小。随后依次介绍：海洋（覆盖71%地表、产生70%氧气、水循环、被称为地球的“心脏”）、湿地（覆盖6%地表、养育40%物种、净化水源、防洪、被称为地球的“肾脏”）、森林（覆盖近三分之一陆地、吸收二氧化碳、产生氧气、净化空气、被称为地球的“肺”）。末段总结三大生态系统共同支撑生命、维持地球健康。意义和价值：文章以清晰的逻辑和生动的比喻向学生介绍三大生态系统的结构和功能，帮助学生理解“每个生态系统都有其独特作用，共同维持地球平衡”的核心概念。文章使用的“心脏”“肾脏”“肺”的比喻形象易懂，将抽象功能与人体器官建立联系，降低理解难度，增强记忆效果。方式和方法：文章采用“总—分—总”结构，按海洋→湿地→森林的顺序展开，每个生态系统单独成段，结构清晰。大量运用数据（71%、70%、6%、40%、三分之一）和比喻（“heart”“kidneys”“lungs”）增强说服力和形象性。文章后附有选择题，训练学生获取细节信息、推断词义和判断语篇类型的能力。教学设计【Reading(1)】Period2:Reading(1)Topic:Theearth'smainecosystemsLearningobjectivesBytheendofthisperiod,studentswillbeableto:Understandtheconceptofecosystemsandthefunctionsofoceans,wetlands,andforests.Identifythemetaphorsusedtodescribeeachecosystem（heart,kidneys,lungs）.Extractkeyinformationandcompletecomprehensiontasks.TeachingfocusUnderstandingthefunctionsofthethreemainecosystems.Understandingtheuseofmetaphors.TeachingdifficultyGraspingabstractconceptslike“ecosystem”andthefunctionalcomparisonofdifferentecosystems.Understandinghowmetaphorshelpexplaincomplexideas.TeachingproceduresRevisionLead-inActivity1:“Bodypartsandtheirjobs.”Theteacherwritesthreebodyorgansontheboard:“heart”,“kidneys”,“lungs”.Theteacherasks:“Whatdotheseorgansdoforourbody?”Studentsshare:heartpumpsblood,kidneyscleantheblood,lungshelpusbreathe.Theteacherthenasks:“Doyouthinktheearthhasorganstoo?Whatmightbetheearth‘sheart,lungs,andkidneys?”Studentspredict.Theteachersays:“Todaywe’regoingtoreadabouttheearth‘sorgans—andmeettheoceans,wetlands,andforests.”设计意图：用人体器官的功能激活背景知识，通过类比启发学生思考“地球的器官”，为阅读比喻修辞做铺垫，激发阅读兴趣。效果评价：观察学生能否说出人体器官的功能，能否做出关于“地球器官”的推测。Theteachercankeepthebodyorgandiagramontheboardthroughoutthelessonforeasyreference.Pre-readingActivity2:“Whatdoyouknowaboutoceans,wetlands,andforests?”Theteacherdrawsathree-columnchartontheboard（Oceans|Wetlands|Forests）.Studentsbrainstormwhattheyalreadyknowabouteach.Theyworkinpairs,thensharewiththeclass.Theteacherwritestheirideasontheboard.Theteacherthensays:“Let‘sreadandseehowmuchweknow—andwhatnewthingswecanlearn.”设计意图：通过头脑风暴激活学生对三大生态系统的背景知识，建立阅读期待，为后续信息对比做准备。效果评价：观察学生能否说出关于三大生态系统的已有知识。While-readingActivity3:“Listenandmatch.”Theteacherreadsthearticlealoud（orplaystheaudio）andasksstudentstolistenandmatcheachecosystemwithitsfunction/symbol:Ocean→“heart”→producesoxygen,watercycleWetlands→“kidneys”→cleanwater,preventfloodsForests→“lungs”→takeinCO₂,produceoxygen,cleanairStudentsmatchafterlistening,thencheckwiththetext.设计意图：通过“听+匹配”的方式帮助学生初步感知三大生态系统及其对应的比喻功能，训练听力获取关键信息的能力。效果评价：观察学生能否准确匹配。Activity4:“Findthenumbers.”Theteacherasksstudentstoscanthearticleandfindspecificnumbers/percentages:“Whatpercentageoftheearth’ssurfacedoestheoceancover?”（71%）“Howmuchoxygendoestheoceanproduce?”（70%）“Whatpercentageoflandareadowetlandscover?”（6%）“Howmanytypesofplantsandanimalsliveinwetlands?”（40%）“Howmuchoftheearth‘slandareadoforestsmakeup?”（nearlyathird）Studentsfindandsharetheanswers.Theteacherasks:“Whydoesthewriterusesomanynumbers?”（Tomaketheinformationmoreaccurateandconvincing.）设计意图：通过“寻找数据”任务培养学生扫读获取具体信息的能力，同时引导学生关注说明文的写作特点——数据增强说服力。效果评价：观察学生能否快速定位数据并理解数据的作用。Activity5:“Puttheorgansbackinorder.”Theteacherwritesthreescrambleddescriptionsontheboardandasksstudentstomatcheachecosystemtoitscorrect“organ”:“Icover71%oftheearth.Iproduceoxygen.Iamtheearth’s______.”（heart）“Icoveronly6%oftheland.Icleanwaterandpreventfloods.Iamtheearth‘s______.”（kidneys）“Imakeupnearlyathirdoftheland.ItakeinCO₂andproduceoxygen.Iamtheearth’s______.”（lungs）Studentscompletethesentencesindividually,thencheckinpairs.设计意图：通过填空活动巩固“生态系统+功能+比喻”的三者对应关系，帮助学生形成知识网络。效果评价：观察学生能否正确完成填空。Activity6:“Understandingthemetaphors.”Theteacherasks:“Whyistheoceancalledthe‘heart’oftheearth?Whyarewetlandscalledthe‘kidneys’?Whyareforestscalledthe‘lungs’?”Studentsdiscussinpairs.Theteacherguidesthemtoseethefunctionalsimilarities:heartpumpsbloodaroundthebody/oceanmoveswateraroundtheearth;kidneyscleanblood/wetlandscleanwater;lungsbreatheinoxygen/foreststakeinCO₂andproduceoxygen.Theteacherasks:“Doyouthinkthesearegoodcomparisons?Why?”设计意图：引导学生深入理解比喻手法的逻辑——通过功能相似性将生态系统与人体器官进行类比，帮助理解抽象概念。效果评价：观察学生能否解释比喻的合理性。Theteachercanbrieflyreviewthethreeecosystemsbeforelisteningoraskstudentstocheckwithapartnerbeforewhole-classfeedback.Ifstudentshavedifficultyfindingtheanswers,providehintsaboutwheretolook（“Trytheparagraphaboutoceans.”）Theteachercandrawasimpleanalogydiagramontheboardtohelpstudentsvisualizethecomparison.Post-readingActivity7:“Completetheecosystemprofile.”Studentsworkingroupsofthree.Eachstudenttakesoneecosystemandwritesashortprofileusingtheinformationfromthearticle:name,keyfacts（area,function）,andsymbol（heart/kidneys/lungs）.Thentheysharetheirprofileswithinthegrouptocreateacompleteset.设计意图：通过小组合作整理信息，培养归纳概括能力和合作学习意识。效果评价：观察学生能否准确提炼每个生态系统的关键信息。SummaryTheteacherasks:“Whatarethethreemainecosystemswelearnedabouttoday?Whatdotheydofortheearth?”Studentsanswer.Theteacherconcludes:“Oceans,wetlandsandforestsworktogetherliketheorgansinourbodytokeeptheearthhealthy.”设计意图：回顾三大生态系统的功能和比喻。效果评价：观察学生能否说出三大生态系统及其功能。HomeworkBasic:Readthearticlealoud2times.Finishthereadingcomprehensionexercisesintheworkbook.Extended:Chooseoneecosystemanddrawapostershowingitsfunctionswiththemetaphor（e.g.,heartwithwatercycle）.BlackboarddesignUnit7ThenaturalworldReading(Period1):Theearth'smainecosystemsTheearth‘sorgans:Ocean→“heart”71%ofearth’ssurfaceproduces70%ofoxygenwatercycleWetlands→“kidneys”6%ofland40%ofplants&animalscleanwater,preventfloodsForests→“lungs”nearly1/3oflandtakeinCO₂,produceoxygencleanair教学反思【Reading(1)】本课时通过“人体器官”导入有效激活了学生的先备知识，为理解“地球的器官”这一比喻建立了良好基础。学生能较快掌握三大生态系统的功能与比喻对应关系，但在解释比喻逻辑时，部分学生需要引导才能说清“肾脏过滤血液，湿地过滤水分”的类比关系。Activity3的“听+匹配”中，个别学生将湿地功能误配给森林，说明听前对三类生态系统的快速回顾仍有必要。后续可将人体器官图保留在黑板一角，方便学生随时参照。整体课堂节奏紧凑，学生参与积极。教学设计【Reading(2)】Period3:Reading(2)Topic:Theearth'smainecosystemsLearningobjectivesBytheendofthisperiod,studentswillbeableto:Analysethestructureofthearticleandidentifywritingtechniques（metaphors,data,comparisons）.Usemetaphorsanddatatodescribeecosystemsintheirownwords.Expressunderstandingoftheimportanceofecosystems.TeachingfocusAnalysingthearticle‘sstructureandwritingtechniques.Usingmetaphorsanddatatodescribeecosystems.TeachingdifficultyUnderstandinghowthewriterusesmetaphors,data,andcomparisonstomakethetexteffective.Creatingoriginaldescriptionsofecosystemsusingsimilartechniques.TeachingproceduresRevisionLead-inActivity1:“Quickrecallrace.”Theteacherdividestheclassintothreegroups.Eachgroupisassignedoneecosystem（ocean,wetlands,forests）.Theteachersaysafunctionandthegroupmustsaytheirecosystem’snameandthemetaphor.Forexample,“produces70%ofoxygen”→Ocean（heart）.Studentsracetoanswer.Thegroupwiththemostcorrectanswerswins.设计意图：用快速回忆竞赛激活上节课内容，确保学生对三大生态系统的功能与比喻关系保持清晰记忆。效果评价：观察学生能否快速准确反应。Toincreasedifficulty,theteachercanaskquestionsthatrequiremultiplepiecesofinformation:“Whatpercentageandwhatmetaphor?”Ifonegroupfallsbehind,allowothergroupstohelporprovidehints.PresentationActivity2:“Unlockingthewriter‘stools.”Theteacherasks:“Whatmakesthisarticleeasytounderstandandremember?”Studentsshareideas.Theteacherintroducesthreekeytechniques:Metaphors:comparingecosystemstobodyorgansData:usingnumberstoshowimportanceThree-partstructure:eachecosystemisdescribedinthesamepattern（area→function→metaphor）Studentsworkinpairstofindexamplesofeachtechniqueinthetext.设计意图：引导学生分析文本的写作手法——比喻使抽象概念形象化、数据增强说服力、平行结构便于理解和记忆。效果评价：观察学生能否找出对应例子并理解每种手法的效果。Activity3:“Comparingthestructure.”Theteacherwritesthepatternforeachecosystemparagraphontheboard:Area:“______covers/makesup______.”Function:“______produces/helps/cleans______.”Metaphor:“______islikethe______oftheearth.”Studentsidentifythateachparagraphfollowsthesamepattern.Theteacherasks:“Whydoesthewriterusethesamepatternforallthreeecosystems?Whateffectdoesthishaveonthereader?”（Itmakesthearticleeasytofollowandhelpsthereadercomparethethreeecosystems.）设计意图：帮助学生发现文章的平行结构——每个生态系统段落的组织方式相同，理解这种结构安排的表达效果。效果评价：观察学生能否识别平行结构并说出其作用。Ifstudentsstruggletoidentifyexamples,theteachercanmodeloneexampleforeachtechniquefirst:“Fordata,lookatthenumbersintheoceanparagraph.Formetaphor,lookforthebodyorganwords.”PracticeActivity4:“Createanewecosystemdescription.”Studentsworkinpairs.Theteacherprovidesanewecosystemprofile（e.g.,coralreefs—coverlessthan1%ofoceanfloor,support25%ofmarinespecies,“nurseries”ofthesea）.Studentswriteashortparagraphfollowingthesamepattern:area→function→metaphor.Theysharetheirparagraphswithanotherpair.设计意图：通过仿写训练，让学生将课文中学到的写作模式（数据+比喻+平行结构）迁移到新内容上。效果评价：观察学生能否运用课文结构写出关于珊瑚礁的段落。Activity5:“Ecosystemdefenders—writingtask.”Studentswriteashortparagraph（4-5sentences）explainingwhyoneecosystemisimportant.Theymustinclude:atleastonepieceofdata,onemetaphor,andaclearstructure（introduction,function,metaphor）.Studentssharetheirparagraphswithapartnerandgivefeedback.设计意图：通过半控制性写作练习，帮助学生综合运用所学写作技巧表达自己对生态系统重要性的理解。效果评价：观察学生能否在写作中运用数据、比喻和清晰的结构。Ifstudentsstrugglewithmetaphors,guidethem:“Thinkaboutwhatcoralreefsdo—theyprotectsmallfish.Whatplaceinourworldprotectschildren?”（nursery.）Ifstudentsfinishearly,theycancreatedescriptionsforadditionalecosystemslikegrasslandsordeserts.Ifstudentsstruggletogenerateideas,providesentencestarters:“______covers______.Ithelpsto______.Therefore,itislikethe______oftheearth.”Forstrongerstudents,encouragethemtocreatetheirownmetaphorswithoutprompts.ProductionActivity6:“Ecosystemmetaphordesign.”Studentsworkindividuallytocreateametaphorfortheearth‘secosystemstogether.Theteacherasks:“Ifoceans,wetlands,andforestsaretheearth’sheart,kidneys,andlungs,whatshouldwecalltheearthitself?Ahuman?Amachine?Somethingelse?”Studentscreatetheirownmetaphorandwrite2-3sentencesexplainingit.Theysharewithapartner.2-3studentssharewiththeclass.设计意图：从仿写和描述上升到创造性表达，引导学生将比喻手法运用到更广阔的语境中，培养创造性思维。效果评价：观察学生能否创作合理的原创比喻。Ifstudentsstrugglewithcreativemetaphors,provideafewexamplestosparkideas:“Theearthislikeahouse,andecosystemsaretherooms.”“Theearthislikeamachine,andecosystemsaretheparts.”Collectstudents’originalmetaphorsanddisplaythemontheclassroomwall.SummaryTheteacherasks:“Whatthreewritingtechniquesdidwelearntoday?Howdotheyhelpusunderstandthearticlebetter?”Studentsanswer.Theteacherconcludes:“Goodwritersusemetaphorstomakeabstractideasconcrete,datatomaketheirargumentstronger,andaclearstructuretohelpreadersfollowalong.You‘vepracticedallthreetoday!”设计意图：回顾本课所学的三种写作技巧及其作用。效果评价：观察学生能否说出三种技巧及其效果。HomeworkBasic:Reviseyourecosystemdescriptionandwriteacleancopy.Finishthevocabularyexercisesintheworkbook.Extended:Findanarticleaboutanecosystemandidentifyoneexampleofametaphorordatausedinit.BlackboarddesignUnit7Thenaturalworld(ReadingPeriod2)Writer’stools:Metaphors:heart,kidneys,lungs→makeabstractideasconcreteData:71%,70%,6%,40%,1/3→maketheinformationconvincingParallelstructure:area→function→metaphor→makeiteasytofollow教学反思【Reading(2)】Activity4的仿写中，部分学生能写出“Coralreefscoverlessthan1%oftheoceanfloor,buttheysupport25%ofmarinespecies.Theyarelikethenurseriesofthesea.”等句子，显示出良好的迁移能力。Activity6的原创比喻中，有学生提出“Theearthislikeahome,andecosystemsaretherooms—eachhasadifferentpurpose.”这一比喻，展现了较强的创造性思维。后续可将学生的原创比喻整理成墙报展示，激发更多创作热情。Grammar

&WordPower语篇研读主题和内容：Grammar板块包含两个语法项目。A部分围绕“动词及句子结构”展开，介绍双宾语结构（S+V+O间接+O直接，如“Thesungivesoceananimalslightandheat.”）和宾语补足语结构（S+V+O直接+C，如“Themotherbirdkeepstheeggssafe.”），并配有结构识别练习。B部分围绕连词and、but、or、so的用法展开，呈现如何用连词连接并列成分和分句（and表相似或承接、but表转折、or表选择、so表结果），并配有句子合并练习。WordPower呈现后缀-ly的构词法，包括形容词→副词（real→really、bad→badly、careful→carefully）和名词→形容词（friend→friendly、love→lovely）两种变化，通过短文填空和写作练习巩固运用。意义和价值：双宾语结构和宾语补足语结构是前一个单元S+V+O结构的延伸和拓展，帮助学生构建更丰富的句子表达能力。连词and、but、or、so是连接句子和段落的核心工具，与单元主题“描述生态系统特征和功能”紧密相关。后缀-ly的构词法帮助学生拓展词汇量，更准确地描述生态现象。方式和方法：A部分以例句和规则讲解为主，通过结构识别练习巩固。B部分以例句和规则讲解为主，通过句子合并练习巩固。WordPower以例词展示和短文填空为主。教学设计Period4:Grammar&WordPowerTopic:Verbsandsentencestructure(2)&Usingand,but,orandsoThesuffix-lyLearningobjectivesBytheendofthisperiod,studentswillbeableto:UnderstandanduseS+V+IO+DOandS+V+DO+C（objectcomplement）structures.Useconjunctionsand,but,or,socorrectlytojoinideas.Understandandusethesuffix-lytoformadverbsandadjectives.TeachingfocusIdentifyingandusingdoubleobjectstructures.Usingconjunctionsand,but,or,so.Usingthesuffix-ly.TeachingdifficultyDistinguishingbetweendirectandindirectobjects.Choosingthecorrectconjunction（and/but/or/so）basedonmeaning.Distinguishingbetween-lyadverbsand-lyadjectives.TeachingproceduresRevisionLead-inActivity1:“Sentencebuildingchallenge.”Theteacherwritesasimplesentenceontheboard:“Theoceangivesanimalsfood.”Theteacherasks:“Whatdoestheoceangive?Whodoesitgiveto?Canyouaddmoreinformationafter‘food’?”Studentsexpandthesentence.Theteachersays:“Todaywe’lllearnhowtomakesentencesricherandhowtojointhemtogether.”设计意图：用学生能理解的简单句引入，通过逐步扩句展示本课语法要点——双宾语、宾语补足语和连词的使用，自然导出语法学习目标。效果评价：观察学生能否参与扩句并理解句子结构。PresentationActivity2:“Twoobjectsinonesentence.”Theteacherpresentsthedoubleobjectstructurewithexamples:“Thesungivesoceananimalslightandheat.”→Thesungiveslightandheattooceananimals.Studentspracticeidentifyingthetwoobjects（lightandheat=directobject;oceananimals=indirectobject）.Theteacherexplainstherulesforusing“to”and“for”.Studentscompletethesentencestructureidentificationexercise（PartA1）.设计意图：通过例句理解双宾语结构，掌握识别直接宾语和间接宾语的方法。效果评价：观察学生能否正确识别句子结构。Activity3:“Objectcomplement.”TheteacherpresentstheS+V+O+Cstructure:“Themotherbirdkeepstheeggssafe.”（safedescribestheeggs）“Theycalltheoceanthe‘heart’oftheearth.”Studentsidentifytheobjectandthecomplement.Theteacherexplainsthatthecomplementgivesmoreinformationabouttheobject.Studentsfindmoreexamplesfromtheunitreading（“Peopleoftencallforeststhe‘lungs’oftheearth.”）.设计意图：通过例句理解宾语补足语结构，掌握识别方法。效果评价：观察学生能否找出宾语补足语。Activity4:“Connectingideaswithand/but/or/so.”Theteacherpresentsthefourconjunctionswithexamplesfromtheunit:and:“Rainforestsarehot,andtheygetalotofrain.”（similar/relatedideas）but:“Desertsaredry,buttheyarenotalwayshot.”（differentideas）or:“Birdscanliveintheforestorinthewetland.”（possibilities）so:“Desertsaredry,sosomeplantskeepwaterintheirleaves.”（result）Studentscompletethetextbookexercises（PartB）.设计意图：通过例句理解四个连词的不同功能，掌握选择依据。效果评价：观察学生能否正确选择连词。Activity5:“Thesuffix-ly—makingadverbsandadjectives.”StudentsreadtheWordPowertable.Theteacherexplainstwouses:Adjective→adverb（real→really,bad→badly,careful→carefully）describeshowanactionisdone.Noun→adjective（friend→friendly,love→lovely）describesaquality.Studentscompletethecoralreeftextwiththecorrectforms.设计意图：掌握后缀-ly的两种用法，理解其词性和词义变化。效果评价：观察学生能否正确选择-ly词形。Ifstudentshavedifficultydistinguishingbetweendirectandindirectobjects,useasimplerdistinction:theindirectobjectisthereceiver(whoreceivestheaction),whilethedirectobjectisthethingbeinggivenoractedupon.Forexample,in“Thesungivesoceananimalslightandheat,”“oceananimals”isthereceiverand“lightandheat”isthethinggiven.Ifstudentsmakeerrorswith“or”and“but,”theteachercanuseasimplesummarytableontheboard:“and→add,but→contrast,or→choose,so→result.”Addmorefill-in-the-blankexercisestoreinforcesemanticjudgment.PracticeActivity6:“Sentencestructureidentification.”StudentsidentifythestructureofeachsentencefromPartA1.Theyworkindividually,thencheckinpairs.Theteachercheckswiththewholeclass.设计意图：在生态主题语境中巩固双宾语和宾语补足语结构的识别能力。效果评价：观察学生能否正确判断句子结构。Activity7:“Conjunctionpractice.”StudentscompletePartB,joiningthesentencesusingand,but,or,andso.Theyworkindividually,thencheckinpairs.Theteachercheckswiththewholeclass.设计意图：在生态描写语境中巩固连词的运用。效果评价：观察学生能否根据语义关系选择正确连词。Activity8:“Coralreefcompletion.”StudentscompleteMillie‘stextaboutcoralreefsusingthecorrectformsofthewordsinbrackets（with-ly）.Theyworkindividually,thencheckinpairs.Theteachercheckswiththewholeclass.设计意图：在生态保护语境中巩固后缀-ly的运用。效果评价：观察学生能否根据语境选择正确的-ly词形。Ifstudentsstruggletodistinguishbetween“friendly”and“really,”usedifferentcoloredchalktomarkthetwodifferentpaths(noun→adjectivevsadjective→adverb)andcreateavisualmemoryaidontheboard.ProductionActivity9:“Myecosystemdescription.”Studentswriteashortparagraph（5-6sentences）aboutoneecosystem.Theymustinclude:AtleastoneS+V+IO+DOstructureAtleastoneS+V+DO+CstructureAtleasttwoconjunctions（and,but,or,so）Atleastone-lywordStudentssharewithapartner.Thepartneridentifiesandcirclestherequiredstructures.设计意图：综合运用本课所学的语法结构进行生态系统描写，实现语法知识的整合运用。效果评价：观察学生能否在写作中正确运用多种语法结构。Ifstudentsrelyonlyonsimplesentences,provideamodelbeforewritingandaskopen-endedquestionslike“Canyoutellmemoreaboutthis?”duringmonitoringtoencouragesentenceexpansion.Provideawordbankofecosystem-relatedvocabularyforstudentswhoneedit.Summary

Theteacherasksquickquestions:“Whattwonewsentencestructuresdidwelearn?Whatfourconjunctionsdidwelearn?Whatarethetwowaysweusesuffix-ly?”Studentsanswerquickly.设计意图：快速回顾本课三个语法点的核心规则。效果评价：观察学生能否简洁准确地说出核心规则。HomeworkBasic:Finishtheexercisesintheworkbook（sentencestructures,conjunctions,-lysuffixes）.Extended:Write5sentencesaboutthenaturalworldusingatleastoneS+V+IO+DOstructure,oneS+V+DO+Cstructure,and