Unit4Lesson12HealthyBones（第一课时）教学设计八年级英语北师大版上册

Unit4Lesson12HealthyBones(第二课时)

LessonFocus

•Adjectivesandtheiropposites

•Adverbialclauseswithalthough,because,butandso

•Givinghealthadvice

Warmup

Exercise1

Purpose:tohelpstudentspredictareading

Directstudentstothestatements.Readthemaloud,orhaveastudentreadthem.Ask“Whichoneisfalse?”Havestudentsthinkaboutthestatementsinpairsorsmallgroups.

Whenstudentsareready,etogetherasaclassandask"Whichstatementdoyouthinkisfalse?"Havestudentssharetheiropinions.Takeapollofstudentsopinions,writingdownhowmanythoughtstatement1wasfalse,statement2andstatement3.Thentellthemtheanswer.

Answer

2isfalse.

Expansion:DoSomeResearch!

Note:Usethisactivitywithmoreproficientstudents.Havestudentsresearchthestatements,learningmoreaboutbones.Studentsshouldeupwiththefollowinginformation;Statement1:Thesmallestboneinthebodyisinyourearandiscalledthestirrupbone(stapes).Itisonly0.25to0.33cmlong(0.10to0.13in)andweighsonly1.98to4.3mg.Statement2:Babieshavemorebonesthanadultsbecauseastheygrowup,someofthebonesfusetogethertoformonebone.Statement3:Women'sbonesstopgrowingaroundtheageof20,whilemen,stoparound25.

Reading

Exercise2

Purpose:tohelpstudentsdecideonatitleforatext

Directstudentstothetitles.Readthemaloud,makingsurestudentsunderstandvocabulary.Say“Skimthetext.Choosethebesttitle”.Makesurestudentsunderstandwhatskimmingis.Skimmingiswhenthereadermovestheeyesquicklyoverthetextwiththepurposeofgettingonlythemainideasandageneraloverviewofthecontent.Monitor,offeringhelpasneeded.Givestudentsonlyaminuteortwotoskim,andthenstopthemandask“Whatdoyouthinkthebesttitleis?”

Gooverstudent'sopinions,askingindividualstudentstosharetheirchoices.Whilethisisasubjectiveexercise,basedonthecontentofthereading,studentsshouldagreethatthebesttitleisB)GettingtoKnowYourBones.

Answer

B

Exercise3

Purpose:tohelpstudentsanswerquestionsbasedonatext

Directstudentstothequestions.Readthemaloud,orhaveastudentreadthem.Thensay“Nowreadthetextagainandanswerthequestions”.Monitor,offeringhelpasneeded.Ifstudentsneedsupport,havethemworkinpairs.

Goovertheanswers,havingstudentsfirstparetheiranswerswithapartner's.Thenaskindividualstudentstoreadtheanswersaloud.Encouragestudentstoanswerinpletesentencesandtoshowevidenceinthetextfortheiranswers.

Answers

1.No,theyarestrong.

2.No,bonesaresoftontheinside.

3.Thesoftpartofthebonemakesourblood.

4.Bloodcarriesnutrientsthroughourbodies.

5.Weshouldgetenoughcalciumandvitamin

D,andweshouldexercisedaily.

Vocabulary

Exercise4

Purpose:tohelpstudentspleteatablewithoppositeadjectives

Askstudentstofindthewordhardinthereading.Oncetheyhavefoundit,askastudenttoreadthesentencealoud:Bonesarehardontheoutside,buttheyaresoftontheinside.Ask“Whatistheoppositeofhardinthesentence?”Elicitsoft.Ifyoufeelyourstudentsareready,youmayskipthisstep.

DirectstudentstotheWordBuildertable.Say“pletetheWordBuilderwiththeopposites".Monitor,offeringhelpasneeded.

Goovertheanswers.First,directstudentstothereadinginExercise2.Askthemtofindtheadjectivesinthereading,aswellastheopposites.Thenhaveindividualstudentsreadtheadjectivesandoppositesaloud,whilepletingasimilartableontheboard.

Answers

inside/outside;sick/healthy;

weak/strong

Expansion:Don'tStop!

Note:Usethisactivitytogivestudentsmorepractice.Givestudentsotheradjectivesandaskthemtofindtheopposites,forexample,light(dark/heavy),solid(hollow),easy(difficult/hard),important(unimportant),etc.Theymaylookinthe