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Unit5LookintoScienceLesson29DNA-TheStoryofYou
1.AnalysisoftheStudentsThestudentsofGrade9havemasteredcertainvocabularies,expressionsandstructures.Theyalsohavetheabilitiesofself-teachingandworkingingroups.MostofthemarewillingtoexpresstheiropinionsinEnglish.
2.AnalysisofTeachingContentLesson28isthefifthlessoninUnit5Book
5.ThisunitfocusonthesubjectLookintosciencealsoteachthestudentssomethingaboutscience.Studentscaresaboutthesubjectbecauseitisclosetoeveryone.Lesson28mainlytalksaboutDNAittellusthecharacterandfunctionofDNAalsounderstandourbody.Weareuniqueintheworld.【知识目标】
1.Tomasterthewords:blueprintgeneralplextwinspatternidentifyberelatedtoexceptfor.
2.Tomasterthephrases:notonly…butalsoexceptforberelatedtobillionsof.【能力目标】Improvethestudents’abilityofspeakinglisteningreadingandwriting.UnderstandthearticlesaboutDNA.【情感目标】Knowmoreaboutthenatureknowmoreaboutourbody.Youareuniqueintheworld.【教学重点】Tomasterthepoundsentences.【教学难点】TomastertheuseofDNA.TaperecorderMultimediaStep
1.Warm-upFreetalk:showthepictureofDNAtellstudentsDNAisshortfordeoxyribonucleicacid.Thinkaboutit!
1.WhatdoyouknowaboutDNA
2.WhatcanscientistsdowithDNAStep
2.Presentation
1.Freetalk:1WhereisitinourbodyShowsomepicturesofDNA.2WhatsthefunctionofDNAShowsomepicturesoftwins.
2.Explainthenewwords.
3.Readthelessonandanswerthequestions1Whatisablueprint2Whichismoreplexbuildingalivingthingorbuildingahouse3DosometwinshavethesameDNA4IsitpossibletochangeyourDNA5WhoseDNAisrelatedtoyours
4.Checktheanswersandunderlinethekeywords.
5.Listenandfollowtothetape.
6.Explainthelanguagepoints:between与amongbetween用于两者之间,among一般指三者或三者以上JacksitsbetweenTimandBob.Jack坐在Tim和Bob之间Shewasamongthecrowd.她处在人群中use…todosth.用……做某事Sheisusingaknifetocutvegetables.她正用小刀切蔬菜use的形容词是useful.Isthefridgeveryuseful这台冰箱很有用吗?too与eithertoo与either都表示“也”,其区别是too用于肯定句,表示“也”;either用于否定句,表示“也不”他们通常都位于句末,其前用逗号隔开Hehasababybrothertoo.他也有个小弟弟Hedoesn’thaveanerasereither.他也没有橡皮own的用法adj.自己的(用在所有格后面,加强语气)Hemakesallhisownnotebooks.她所有的衣服都是自己做的vt.有;拥有Whoownsthecar这辆汽车是谁的?ownern.所有人;物主Sheistheownerofthehouse.她是这座房子的主人exceptfor除……以外,只是Davidisagoodmanexceptforhottemper.大卫除了脾气暴躁以外,他是个好人Theclassroomisniceexceptfordirtyonthefloor.教室除了地板脏以外都很好Step
3.Practice
1.Readthelessonbythemselves.
2.Fillintheblankswiththephrasesintheboxonpage
75.ingeneralexceptfornotonly…butalsorelatedtoevenifthesame…as…1Yourhomeworkisquitegood__________afewspellingmistakes.2_________theyoung_________theoldlikepopmusic.3Kate’shairis_____________colour_________hersister’s.4________________womenlivelongerthanmen.5_____________manydifficultiesremainwecanoverethem.6Iswealth______________happiness
3.Checktheanswers.
4.Askstudents:DoyouthinkDNAcanchangeeachotherReadagainandpletethepassagewiththesentencesinthebox.ChangingDNA DoyouknowDNAcanbechangedHaveyoueverseenapigwithadog’sbodyOfcoursenot!Pigsanddogscan’thavebabiestogether._________Butnowscientistscandoit.ScientistscantakeDNAfromonekindofanimalandputitintoanotherkindofanimal.TheycandesignnewplantsbybiningtheDNAofotherplants. _____________Somescientistsareworried.TheysayweneedtoknowmoreaboutDNAbeforewestartchangingit.________ButwhatiftheplantsarebadforhumanstooA.TheirDNAcan’tbine.B.Wecanmakeplantsthatarebadforpests.C.TheycanevenbinetheDNAofaplantandananimal.
5.Checktheanswers.Step
4.ConsolidationGroupwork:IsitagoodideatochangetheDNAofthefoodweeatSomepeoplesaydoingthismakesourfoodbetter.Othersthinkit’stoodangerous.
1.Discusstheideaofyours.
2.Writedownyourideas.
3.Reportyouideas.Step5Homework
1.Listenandread.
2.Finishexercisesofthislesson.略◆教材分析◆教学目标◆课前准备◆◆教学过程。