Module5ALessoninaLabIntroductionandvocabulary教案Period1Teachingaims:1.Tointroducesomegeneralscience.2.Tolearnsomewordsrelatedtothethemeofthismodule.3.Todevelopspeakingabilitybypracticingsayingthenumbers,especiallythefractions.Importantanddifficultpoints:1.Arousethestudents’interestsandloveinscience.2.Enablethestudentstounderstandsomeelementsaboutthechemistrylab.3.Makethestudentsknowhowtoreadthenumbers.Teachingprocedures:Step1.IntroductionActivity1Theaimoftheactivityistoaskthestudentstofinishthequizaboutgeneralsciencetoarousetheirinterestinscience.Theactivitycanbedoneasfollows:Firstly,askthestudentstogothroughthefollowingthequizandmaketheirchoiceontheirown.Quiz:Howmuchdoyouknowaboutgeneralscience?1.Waterexists__________.(a)asasolid,aliquidandagas(b)asasolidandaliquidonly2.Whenyouheatametal,itwill___________(a)expand(b)contract3.Steelismixtureof_____________.(a)ironandothersubstances.(b)ironandoxygen4._______________oftheearth’ssurfaceiswater.(a)Two-thirds(b)50%5.Thedistanceofthesunfromtheearthis______________kilometers.(a)25,500(b)150,500,5006.Theearthis4.6______________yearsold.(a)million(b)billion7.Theearthis______________themoon用心爱心专心(a)twiceaslargeas(b)forty-ninetimeslargerthanThenputthestudentsinpairstocomparetheiranswersandcallbacktheanswersfromtheclass.Finallyaskthemtolistentothetapeabouttheabovequizandchecktheiranswers.Answers:1.a;2.a;3.a4.a;5.b;6.b;7.b.Activities2&3Theteachercanpreparesomecardsaboutdifferentthingsfortheclassatfirst.Beforeshowingthestudentsthecards,theteachercansaytothewholeclass:Thingscanbedividedintothreekinds,natural,man-made,andeithernaturalorman-made,nowI’llshowyousomecardsinmyhand,canyoutellmewhicharenatural,man-madeorboth?Afterthis,theteachercancontinuetosaytothewholetheclass:Canyougivesomeexamples?Thendividethewholeclassintotwobiggroupstocompete.TheteachercanasktheSstospeakoutasmanyexamplesaspossibleandwritedownthewordsinthetableontheblackboardasfollows:NaturalEg:wood,------Man-madeEg:glass,------Eithernaturalorman-madeEg:water,------Finally,asktheSstoopentheirbooksatPage41andreadthewordsintheboxaloud.Ifpossible,theycanlookupthewordstoknowwhattheymean.Ofcourse,theabovecompetitionwillcontinue,thatistosay,atthismoment,theteachercanasktheSstoputthewordsintheboxonPage41intheirbooksintheabovetable.Step2.VocabularyandSpeakingActivity1Theaimoftheactivityistohavethestudentsknowhowtoreadthelongnumbers.Sotheactivitycanbedonelikethis:Beforedealingwiththeactivity,theteacherhadbetterbuildupalongnumberbyhavingthestudentssayanincreasingsequence,eg:3three33thirty-three333threehundredandthirty-three3,333threethousand,threehundredandthirty-three33,333thirty-threethousand,threehundredandthirty-three用心爱心专心Atthistime,mostoftheSswillknowthewayofreadingtheselongnumbers:wheretosay“million”,“thousand”,and“hundred”.Soinordertoconsolidatewhattheyjustlearned,theteachercanpracticesayingthenumbersatthetopofPage42withthestudentstomakesuretheSshavethecorrectintonation.ThenasktheSstogothroughtherestofthenumbersinActivity1andfindtheerrorsindividuallyaccordingtothedirections.Finallytheteachercallsbacktheanswersfromtheclass.Answers:1)Theword“thousand”ismissingafter“fourhundredandseventy”;2)Theword“one”(or“a”)ismissingbefore“hundredmillion”.Activity2Firstly,theteacherpointatthefractionsandsaytheminEnglish.AtthesametimetheteacherhavetheSsrepeatthemafterhimorher.ThentheteacherandtheSsmakeananalysisabouttherulesofreadingfractionsinEnglishtogether.FinallytheteacherasktheSstoreadtherestofthefractionsinActivity2onPage42intheirbooksinEnglishontheirown.Ifnecessary,theteachercanwritedownthecorrectanswersontheblackboardtocheckwhattheyread.Answers:1.two-fifths;2.five-eighths;3.nine-tenths4.three-eighths;5.five-sixths.Activity3Theteachershouldintroducetheconceptofpercentageatfirst,andthentheteacherwritedownsomepercentagesontheblackboardandreadthemoutinEnglish.Eg:35%→thirty-fivepercent(or:35percent);50percentequalsahalf.ThenhavetheSspracticereadingaloudthefollowingpercentages:40%;55%;85%.FinallyhavetheSsworkinpairstodescribethefractionsinActivity2aspercentagesinEnglish.Answers:1.Aquarteristhesameas25%;2.Onethirdisthesameas33.33r%(thirty-threepointthreerecurringpercent);3.Four-fifthsisthesameas80%;4.Onetenthisthesameas10%;5.Three-quartersisthesameas75%;6.Onehalfisthesameas50%;7.Two-thirdsisthesameas66.66r%(sixty-sixpointsixsixrecurringpercent);8.Two-fifthsisthesameas40%;9.Five-eighthsisthesameas62.5%(sixty-twopointfivepercent);10.Nine-tenthsisthesameas90%;11.Three-用心爱心专心eighthsisthesameas37.5%(thirty-sevenpointfivepercent);12.Five-sixthsisthesameas83.33r%(eighty-threepointthreerecurringpercent).Step3.Homework1.Previewthereadingpart.2.WorkinpairstofinishActivities4&5onPage43.用心爱心专心
