2013北师大版高二下unit 21《human biology》(lesson 1)word教案2

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1、Unit21HumanBiologyLesson1ChewingGumTeachingAims:1.Toimprovethereadingabilityofthestudentsandhelpthemstudythestructureofthetextandunderstandthetextwholly.2.Toenrichthestudents’knowledgeabouttheadvantagesanddisadvantagesofchewinggumandencouragethemtotalkabout

2、theproblemofstudents’chewinggumintheschoolTeachingDifficultiesandEmphasis:1.Helpthestudentstofindmoreadvantagesanddisadvantagesofchewinggum.2.Helpthestudentstocarryoutthediscussion.Teachingmethods:1.Task-basedteaching.2.Individualandgroupwork;Discussing.Tea

3、chingAids:ComputerandworksheetsTeachingProcedures:Step1:Leading-in1.ShowthepictureofaNBAstar(MichealJordan).1)Whoistheman2)Whatisthemaneating?Step2:Reading1.Doyoulikechewinggum?2.Isitgoodorbadforourhealth?-----Tochewornottochew3.Listentothetapecarefullyandd

4、ividethetextintoseveralpartsPart1(para1):introductionPart2(para2-4):theadvantagesofchewinggumPart3(para5-7):thedisadvantagesofchewinggumPart4(para8):conclusion4.Findtheadvantagesanddisadvantagesofchewingguminthetext.AdvantagesDisadvantages1.helpingpeoplefig

5、htbadbreath2.helpingpeoplestoptoothdecay3.helpingpeopleloseweight4.helpingsmokersgiveupsmoking1.makingdigestionmoredifficult2.causingfeelingsofsicknessorheadaches3.leadingtostomachsickness4.makingpeopleneglectbrushingtheirteeth5.Findmoreadvantagesanddisadva

6、ntagesofchewinggum(showsomepicturesorvideos).6.Decideifthefollowingstatementsaretrueorfalse.1).Dietspecialistsseldominformusthatitisimportanttochewourfoodproperly.(F)2).Chewinggumcannotfightbadbreath.(F)3).Ifyouhadchewedsugar-freegumregularlyfortwoyears,you

7、wouldhavelostupto5kilos.(F)4).Ifpeoplechewed50timesperminutefor24minutes,70kilocalorieswereburned.(T)5).Chewinggumcanhelpsmokersgiveuptheirbadhabitmoresuccessfully.(T)6).Whenwechewgum,itwillnotcauseourbodiestoproducedigestivesjuices.(F)7).Chewinggumforlongp

8、eriodsoftimewillmakeourstomachbecometense.(T)8).Chewingsugar-freegummustcausethenumberofyoungpeoplewithbadteethtorise.(F)9).Onbalance,itwouldbebettertochewgum.(F)7.Fillintheblankswiththeproperwordswhic