外研版必修一Module 5 A Lesson in a Lab完整教案.docx

外研版必修一Module 5 A Lesson in a Lab完整教案.docx

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外研版必修一Module5ALessoninaLab完整教案

外研版必修一Module5ALessoninaLab完整教案

Period1

Teachingaims:

1.Tointroducesomegeneralscience.

2.Tolearnsomewordsrelatedtothethemeofthismodule.

3.Todevelopspeakingabilitybypracticingsayingthenumbers,especiallythefractions.

 Importantanddifficultpoints:

1.Arousethestudents’interestsandloveinscience.

2.Enablethestudentstounderstandsomeelementsaboutthechemistrylab.

3.Makethestudentsknowhowtoreadthenumbers.

Teachingprocedures:

Step1.Introduction

Activity1

Theaimoftheactivityistoaskthestudentstofinishthequizaboutgeneralsciencetoarousetheirinterestinscience.Theactivitycanbedoneasfollows:

Firstly,askthestudentstogothroughthefollowingthequizandmaketheirchoiceontheirown.

Quiz:

Howmuchdoyouknowaboutgeneralscience?

1.Waterexists__________.

（a）asasolid,aliquidandagas（b）asasolidandaliquidonly

2.Whenyouheatametal,itwill___________

（a）expand（b）contract

3.Steelismixtureof_____________.

（a）ironandothersubstances.（b）ironandoxygen

4._______________oftheearth’ssurfaceiswater.

（a）Two-thirds（b）50%

5.Thedistanceofthesunfromtheearthis______________kilometers.

（a）25,500（b）150,500,500

6.Theearthis4.6______________yearsold.

（a）million（b）billion

7.Theearthis______________themoon

（a）twiceaslargeas（b）forty-ninetimeslargerthan

Thenputthestudentsinpairstocomparetheiranswersandcallbacktheanswersfromtheclass.

Finallyaskthemtolistentothetapeabouttheabovequizandchecktheiranswers.

Answers:

1.a;2.a;3.a4.a;5.b;6.b;7.b.

Activities2&3

Theteachercanpreparesomecardsaboutdifferentthingsfortheclassatfirst.Beforeshowingthestudentsthecards,theteachercansaytothewholeclass:

Thingscanbedividedintothreekinds,natural,man-made,andeithernaturalorman-made,nowI’llshowyousomecardsinmyhand,canyoutellmewhicharenatural,man-madeorboth?

Afterthis,theteachercancontinuetosaytothewholetheclass:

Canyougivesomeexamples?

Thendividethewholeclassintotwobiggroupstocompete.TheteachercanasktheSstospeakoutasmanyexamplesaspossibleandwritedownthewordsinthetableontheblackboardasfollows:

Natural

Eg:

wood,------

Man-made

Eg:

glass,------

Eithernaturalorman-made

Eg:

water,------

Finally,asktheSstoopentheirbooksatPage41andreadthewordsintheboxaloud.Ifpossible,theycanlookupthewordstoknowwhattheymean.Ofcourse,theabovecompetitionwillcontinue,thatistosay,atthismoment,theteachercanasktheSstoputthewordsintheboxonPage41intheirbooksintheabovetable.

Step2.VocabularyandSpeaking

Activity1

Theaimoftheactivityistohavethestudentsknowhowtoreadthelongnumbers.Sotheactivitycanbedonelikethis:

Beforedealingwiththeactivity,theteacherhadbetterbuildupalongnumberby

havingthestudentssayanincreasingsequence,eg:

3three

33thirty-three

333threehundredandthirty-three

3,333threethousand,threehundredandthirty-three

33,333thirty-threethousand,threehundredandthirty-three

Atthistime,mostoftheSswillknowthewayofreadingtheselongnumbers:

wheretosay“million”,“thousand”,and“hundred”.Soinordertoconsolidatewhattheyjustlearned,theteachercanpracticesayingthenumbersatthetopofPage42withthestudentstomakesuretheSshavethecorrectintonation.

ThenasktheSstogothroughtherestofthenumbersinActivity1andfindtheerrorsindividuallyaccordingtothedirections.

Finallytheteachercallsbacktheanswersfromtheclass.

Answers:

1）Theword“thousand”ismissingafter“fourhundredandseventy”;2）Theword“one”（or“a”）ismissingbefore“hundredmillion”.

Activity2

Firstly,theteacherpointatthefractionsandsaytheminEnglish.AtthesametimetheteacherhavetheSsrepeatthemafterhimorher.

ThentheteacherandtheSsmakeananalysisabouttherulesofreadingfractionsinEnglishtogether.

FinallytheteacherasktheSstoreadtherestofthefractionsinActivity2onPage42intheirbooksinEnglishontheirown.Ifnecessary,theteachercanwritedownthecorrectanswersontheblackboardtocheckwhattheyread.

Answers:

1.two-fifths;2.five-eighths;3.nine-tenths4.three-eighths;5.five-sixths.

Activity3

Theteachershouldintroducetheconceptofpercentageatfirst,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-eighthsisthesameas37.5%（thirty-sevenpointfivepercent）;12.Five-sixthsisthesameas83.33r%（eighty-threepointthreerecurringpercent）.

Step3.Homework

1.Previewthereadingpart.

2.WorkinpairstofinishActivities4&5onPage43.

Periods2&3

Teachingaimsanddemands:

1.Tolearnaboutsomevocabularyandknowledgerelatedtoscienceandexperiments.

2.Toknowaboutsomemetalsandgettoknowtheirmainusesinourlives.

3.TomakethestudentsknowhowtodoasimpleexperimentandwritethereportaboutitinEnglish.

4.Todealwithalltheactivities1-6aboutpassageAandpassageBonpage44-45.

5.Todevelopstudents’expressionabilityaswellasreadingabilitybypracticingthesetwopassages.

6.Toraisestudents’interestsinscienceandformtherigorousscientificattitude.

Teachingkeypoints:

1.Tomakethestudentsunderstandandgraspthevocabularyandknowledgerelatedtoscienceandexperiments.

2.Toenablethestudentstoknowhowtoreadsomepassagesaboutsimplescientificexperiments.

Teachingdifficulties:

TomakestudentslearnhowtowriteanexperimentreportinEnglish

Teachingmethods:

⒈CommunicativeApproach

⒉Task-basedApproach

⒊Aural-oralApproachwiththehelpofthemulti-mediacomputerandtherecorder

Teachingaids:

Multi-mediacomputer;Software;PowerPoint;Recorder

Teachingprocedures:

Step1:

Lead-in

Atfirstshowthestudentsthepictureofalabwiththehelpofcomputer.

Thendesignthefollowingquestionsandaskthestudentstodiscussthemingroups:

1.Areyouinterestedindoingscientificexperiments?

2.Supposeyouwanttodoachemicalexperimentaboutsomemetals,doyouthinkitisnecessarytoknowabouthowtheyreactwithothersubstances?

3.Inordertocarryoutanexperimentsuccessfully,whatshouldyouprepareforit?

ThisstepistowarmupthestudentsandraisetheirintereststospeakEnglishinclass.Becauseallthesequestionsareveryclosetothestudents’dailylifeandstudying

Step2.Pre-reading

Teacher:

Sinceyouareinterestedindoingscientificexperiments,nowlet’sgettoknowsomevocabularyandknowledgerelatedtoscienceandexperiments.

AtthesametimeIcantypeoutsomepicturesaboutsomemetalsonthescreenwiththehelpofthecomputerasfollows:

⑴potassium（钾）⑵sodium（钠）⑶calcium（钙）⑷magnesium（镁）

⑸aluminium（铝）⑹zinc（锌）⑺iron（铁）⑻copper（铜）

AsItypeouteachoftheabovepictures,Icanaskthestudentslikethis:

What’sthis?

Andwhatcanitbeusedfor?

Atthismomentthestudents’interestsareprobablyapproachingaclimax.SoIfurtheraskthemlikethis:

Doyouwanttoknowmoreaboutthesemetals?

Anddoyouknowhowwecanusethesemetalsbetter?

Well,thisiswhatwe’llstudyverysoon.

Thisstepisemployedtocreatealanguageenvironmentforstudents’communicationandarousetheirinterestsinreadingpassageAandpassageBonpage44-45

Step3.Reading

PassageA

T:

Well,let’sreadthroughpassageAwiththetapeofitveryquicklytotrytocatchitsmainidea.ThenfinishActivity2onpage44andgiveyourreasons.

Next,asktheSstoreadpassageAverycarefullytofindouttheanswersinActivity3onpage44.Finishthisactivitybymulti-mediacomputer.Itcanbedesignedasfollows:

1.Whichofthemetalsinthetablereactsthemostwithoxygenandwater?

Potassium,calciumandsodium.

2.Whathappenswhenyouheatcalciuminoxygen?

Itburnstoformanoxide.

3.Whichmetalsreactwithsteam?

Magnesium,aluminiumandzinc.

4.Doesironhaveasloworfastreactionwithsteam?

Ithasaslowreaction.

5.Doescopperreactwithwater?

No,itdoesn’t.

PassageB

T:

Well,frompassageAwecanseehowinterestingtheexperimentaboutthereactionofmetalsis!

Butdoyouknowhowwecancarryoutachemicalexperimentinalabsuccessfully?

Andwhatisthecorrectordertodescribeascientificexperiment?

AsktheSstolookatActivity1onpage44andgivethemabout2minutestodiscussit.Thencollecttheanswersfromthem.Atthesametimetypeoutthecorrectansweronthescreenwiththecomputerasfollows:

T:

Now,let’scometosee“Asimplescientificexperiment”!

ThenplaythetapeofpassageBforthestudentsandaskthemtoreadthepassagewiththetapequicklyandfinishActivity4onpage44.

Inordertoleadthestudentstoreadthetextverycarefully,thefollowingtask-basedquestionscanbesignedt