Unit 9 Human Biology Lesson 1 To clone or not to clone_ （教学课件）-高中英语北师大版（2019）选择性必修第三册.pptxVIP

Unit9HumanBiologyLesson1Tocloneornottoclone?

教材分析本单元第一课是一篇介绍克隆的文章。从人工克隆羊多莉到克隆猴“中中”和“华华”说起，陈述人工克隆技术的潜在意义和所遭受的舆论质疑。最后得出结论不能因工具被人误用就否认工具本身的价值。教学目标在本课学习结束时，学生能够：1.获取文章主旨大意；2.理解人工克隆技术潜在的意义和所遭受的质疑；3.反思人类使用工具的方法，拒绝滥用工具。教学重难点【教学重点】1.获取文章主旨大意；2.理解人工克隆技术潜在的意义和所遭受的质疑。【教学难点】反思人类使用工具的方法，拒绝滥用工具。

Step1Lead-inWhatdoyouknowaboutcloning?Whatadditionalinformationwouldyouliketoknow?Usethewordsandphrasestohelpyou.设计意图：创设情境，引入主题，激活学生已有语言和知识，为阅读做好准备。Step2Reading1.Readthroughthearticle.Drawastructuralmaptoshowhowtheparagraphsareorganised.2.Readparagraphs1-4andmakedetailednotesaboutcloningthatbetterillustratetheinformation.Thenshareyournotesinasmallgroup.3.Readthefirstfourparagraphsagain.Askandanswerthequestionsinpairsbasedonyournotes.4.Readparagraphs5-6andcompletethenotes.5.Readthelastparagraph.WhatdoesEinstein’squotemean?6.Talkaboutcloningusingtheinformationinthearticle.7.Thinkandshare.(1)Whydoresearchersinsistthatthescienceofcloningshouldbefurtherexploredandadvanced?(2)Whatisthewriter’sattitudetowardscloning?Findevidence.8.Readthefirstsentenceofeachparagraph.Arethereanysignalwords,suchaslinkingwordsortimeexpressionsthathelptomakethearticlecoherent?设计意图：先阅读文本，获取梳理文本基本信息。之后引导学生深化理解文章细节，解析语篇用词，理解作者深意。Step3PracticeCompletethesummaryusingtheinformationinthearticle.设计意图：通过完成课文语法填空，巩固对语篇的理解以及单词识记。Step4Assignment1.Searchonlineandfindmoreinformationaboutthedevelopmentofcloning.Sharetheinformationinclass.2.Doyouthinkcloningisagoodidea?Usewhatyouhavelearnttotrytopersuadesomeonetoacceptyourpointofview.设计意图：搜寻更多有关克隆的信息，表达对克隆的看法。

Watchthevideoandanswerthefollowingquestions.Doyouwanttobecloned?Whyorwhynot?Whatdoyouknowaboutcloning?HowdoesDollydifferfromothersheep?

克隆（Clone）是指生物体通过体细胞进行的无性繁殖，以及由无性繁殖形成的基因型完全相同的后代个体组成的种群。通常是利用生物技术由无性生殖产生与原个体基因完全相同的个体或种群。Lead-