6
Differentiating Instruction: Making It Happen in Classrooms By Dr. Vicki Gibson Gibson Hasbrouck & Associates Wellesley, MA Differentiating Instruction: Making it Happen in Classrooms Identifying what literature and research report about differen- tiating instruction is critical to understanding how to make it happen in classrooms (Gibson & Hasbrouck, 2008; Marzano, Marzano, & Pickering, 2003). Numerous publications are avail- able that describe the character- istics of differentiating instruction or suggest curricula and activities that can be modified to address student variance (Evertson & Harris, 1999; Marzano, Marzano, & Pickering, 2003; Rothstein-Fisch & Trumbull, 2008; Tomlinson & Eidson, 2003). Those resources are important supports for teachers and admin- istrators who desire to understand the concept of differentiating instruction, and to identify resources for forming a plan of action. However, research-based methods are needed to carry out the plan, successfully implement change, monitor progress, and assess effects on teacher and student outcomes (Evertson, Emmer, & Wor- sham, 2003; Gibson, et. Al, 2008; McLeod, Fisher, & Hoover, 2003); Tomlinson & McTighe, 2006). At its simplest, differentiating instruction means teaching differently to address the diversity of stu- dents’ needs. It is contrasted to traditional prac- tices using whole-group lecture format where stu- dent learning and participation are more passive and unresponsive to individual needs. Increasing student variance, often described as disparity in skills and knowl- edge, presents huge challenges for teachers and administrators assigned the job of differentiating instruction. Many educators are wondering how to make differen- tiating instruction happen success- fully in classrooms? Teaching differently to address student variance is possible, but it requires changes in practice, which involves changing the behavior of teach- ing. In order to know where to begin the process of implementing changes in instructional delivery, teachers and administrators need to evaluate the following: How instruction is currently delivered in class- rooms: using whole-class lecture or a combination of whole-class and small-group lessons What is taught and whether pacing and cur- ricula are appropriate to address student needs (i.e., instructional and program effectiveness—the quality of the teaching and curricula) What professional development training has been provided to prepare teachers for differentiat- ing instruction, including how to observe patterns of error and use data to inform practice, grouping for instruction, and aligning curricula to needs

Vicki Gibson

Embed Size (px)

DESCRIPTION

sada

Citation preview

D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s

Differentiating Instruction:Making It Happen in Classrooms

By

Dr. Vicki GibsonGibson Hasbrouck & Associates

Wellesley, MA

D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s

Differentiating Instruction: Making it Happen in Classrooms

Identifyingwhatliteratureandresearchreportaboutdifferen-tiatinginstructioniscriticaltounderstandinghowtomakeithappeninclassrooms(Gibson&Hasbrouck,2008;Marzano,Marzano,&Pickering,2003).Numerouspublicationsareavail-ablethatdescribethecharacter-isticsofdifferentiatinginstructionorsuggestcurriculaandactivitiesthatcanbemodifiedtoaddressstudentvariance(Evertson&Harris,1999;Marzano,Marzano,&Pickering,2003;Rothstein-Fisch&Trumbull,2008;Tomlinson&Eidson,2003).Thoseresourcesareimportantsupportsforteachersandadmin-istratorswhodesiretounderstandtheconceptofdifferentiatinginstruction,andtoidentifyresourcesforformingaplanofaction.However,research-based methodsareneededtocarryouttheplan,successfullyimplementchange,monitorprogress,andassesseffectsonteacherandstudentoutcomes(Evertson,Emmer,&Wor-sham,2003;Gibson,et.Al,2008;McLeod,Fisher,&Hoover,2003);Tomlinson&McTighe,2006).

Atitssimplest,differentiatinginstructionmeansteachingdifferentlytoaddressthediversityofstu-dents’needs.Itiscontrastedtotraditionalprac-ticesusingwhole-grouplectureformatwherestu-dentlearningandparticipationaremorepassiveandunresponsivetoindividualneeds.Increasing

studentvariance,oftendescribedasdisparityinskillsandknowl-edge,presentshugechallengesforteachersandadministratorsassignedthejobofdifferentiatinginstruction.Manyeducatorsarewonderinghowtomakedifferen-tiatinginstructionhappensuccess-fullyinclassrooms?

Teachingdifferentlytoaddressstudentvarianceispossible,butitrequireschangesinpractice,

whichinvolveschangingthebehaviorofteach-ing.Inordertoknowwheretobegintheprocessofimplementingchangesininstructionaldelivery,teachersandadministratorsneedtoevaluatethefollowing:

• Howinstructioniscurrentlydeliveredinclass-rooms:usingwhole-classlectureoracombinationofwhole-classandsmall-grouplessons

• Whatistaughtandwhetherpacingandcur-riculaareappropriatetoaddressstudentneeds(i.e.,instructionalandprogrameffectiveness—thequalityoftheteachingandcurricula)

• Whatprofessionaldevelopmenttraininghasbeenprovidedtoprepareteachersfordifferentiat-inginstruction,includinghowtoobservepatternsoferrorandusedatatoinformpractice,groupingforinstruction,andaligningcurriculatoneeds

6642_Vicki_Gibson_6pg.indd 6 12/1/08 3:44:14 PM

• Whatprofessionaldevelopmentwillbere-quiredtoimproveinstructionaleffectivenessandsustainchange

Often,administrativeexpectationsforteachers’performanceexceedpriortrainingandexpertise,andonlyminimal,ifany,on-the-jobsupportisprovided.Teachersareaskedto:1)assessstu-dentstrengthsanddiagnoseneeds,2)usedatatogroupstudentsforinstruction,3)usedatatoselectcurriculaandactivitiesthatwillbeacademi-callyprofitable,4)deliverhighquality,differentiat-edinstructionfordiverseneeds,5)monitorprog-ressandadjustinstruction,reteachingasneeded,and5)manageclassroomsofactivestudents.Justthedescriptionoftheseexpectationssoundsover-whelming,especiallyifnomethodologyhasbeenprovidedforhowtomakethishappen.

Theproblemteachersfaceishowaretheysupposedtogeteverythingdoneanddifferentiateinstructiontoincreasestudentachievement?Whereistheirguideforscalingthatmoun-tain?Scientificresearchhasnotprovidedproceduralmodelsfordifferentiatinginstructionpar-tiallybecauseoftheambiguitysurroundingwhatitisandthelimitedresearchonhowtoimple-mentitsuccessfullyinclassrooms.Inordertoclarifyexpectations,theFloridaCenterforReadingResearch(FCRR,2006)presentedthisdefinitionofdifferentiatedinstruction:“matchinginstructiontomeetthedifferentneedsoflearnersinagivenclassroomthatincludessmall-groupsandincreasedpracticeopportunitiesintheformofreadingcenters.”Whilethedefinitiondescribescomponents—matchinginstructiontoneeds,small-groups,andmorepractice—itdoesnotprovidethemethod-ologyformakingdifferentiationoccur.Withnotraining,teachersareforcedtorelyonpersonaleducationalexperiencesandbeliefsystemsastheirmodelforgoodinstruction.Teachersteachthewaytheylearned.Traditionalwhole-classlectureprevailsbecauseitisafamiliarhabitand

environmentdespiteevidencethatwhole-classlectureformatsrestrictopportunitiesforindividu-alizinginstructionandfailtoaddressthediverseneedsofalllearners(Vaughnetal.,1998).Incon-trast,student-responsive,multi-tieredsmall-groupinstructionhasbeenproventoimprovereadingachievement,butdeliveringthattypeofinstruc-tionwillrequireteachertraining(Hall,2002;Tilly,2003;Vaughn,2003).

Simplygroupingstudentsforinstructionisnotnecessarilydifferentiatinginstructioneither.Groupingitselfisonlyaproceduralchange.Inordertodifferentiateteaching,changesmustoccurinlessoncontentandselectionofcurriculaandactivitiestoensureinstructionandpracticearealignedtostudentskillsandneeds.Teachersmustselectmaterialsthatareacademicallyprofit-able,notjustbusyworkortimefillers.Teachingin

small-groupsisnotdifferentiatedwhenallstudentsreceivethesameinstructionorusethesamecontent,materials,andactivities.

Changingpracticewillrequiremoreprofessionaldevelopmentthathelpsteachersdevelopnewdeliveryanddecision-makingtoolssotheycanincorporatenewteachingandlearningbehaviorsintheclassroom.Specifically,teachersneedhelptodifferentiateinstruction.Theyneedtoknowhowto:

• Changeinstructionaldelivery,managingwhole-classandsmall-groupinstruction;

• Collectandusedatatoaligncontent,orwhatistaught,tostudentneeds,and

• Improveinstructionaleffectiveness,enhancingthequalityoftheinstruction.

Changingdeliveryinvolvesgroupingforinstruc-tionsothatopportunitiesforexplicit,skills-focusedteachinginsmall-groupsincrease.Researchfindingsrevealthatstudentsreceivinginstructioninsmall-groupslearnedsignificantlymorethanstudentswhowerenotinstructedin

D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s

“ In order to differentiate teaching, changes must occur in lesson content

and selection of curricula and activities to ensure instruction and practice are aligned to student

skills and needs.”

6642_Vicki_Gibson_6pg.indd 1 12/1/08 3:44:11 PM

small-groups(Louetal.,1996;Mathes&Fuchs,1994;Moodyetal.,1997).Thisoccurredwheninstructionandmaterialsusedinthesmall-grouplessonswereadjustedforspecificstudentneeds.Ideally,teachersshouldalternatetimeperiodsforwhole-classlessons(usedtointroducecontent,modelexpectations,orreviewpreviouslytaughtcontent)andsmall-group,teacher-ledlessons(providingopportunitiesformorestudenten-gagementinexplicit,skills-focusedinstructionwithconstructivefeedback).

Inadditiontoidentifyingnecessaryenvironmentalandinstructionalchanges,twoimportantteacherconcernsmustbeaddressedwheninitiatingim-plementationofdifferentiatedinstruction.Teach-ersoftenask,“WhataretherestofthestudentsdoingwhileIamteachingasmall-group?”and“HowdoIgeteverythingdone?”Theanswertothesequestionsisfoundinaninstructionman-agementsystemthatincludesfoursteps:

1. Preparingtheclassroomenvironmentforcol-laborationandsmall-groupinstruction

2. Assessingstudents’strengthsandneedstoaligncurriculumwithneeds

3. Creatingteachingtoolsformanagingresourc-essuchastime,pacing,andwork

4. Developingarotationchartthatidentifiesgroupmembershipsandclarifiesperformanceexpectations,(i.e.whereandwhenstudentspar-ticipateinvariousactivities)

StepOneinvolvespreparingthephysicalenvi-ronmentbyarrangingfurnituretocreatelearn-ingcentersorworkstationswherestudentscancompleteassignmentsorprojectseitherworkinginsmall-groups,withapartner,orindependently.Desksmaybepushedtogetherortablesmaybeusedforsmall-groupactivities,formingaTeach-ingTableforteacher-ledlessons,workstationsforcollaborativepractice,andaworktableusedforhomeworkpractice.Collaborationinsmall-groupsandpeertutoringareencouragedtoenhancelearningwithoutinterruptingtheteacher,whomaybeworkingwithanothergroup.

StepTwoinvolvesdividingstudentsintosmallergroupsusingeitherhomogeneous(bysimilarskill)orheterogeneous(mixedskill)groupings.Membershipschangeflexiblyaccordingtostudentprogressandachievement,typeofactivity,orresources(time,equipment,personnel).Assign-ingsmall-groupmembershipsensurescompat-ibilityforbehaviorsandguidedpractice.Teachersusuallycreatethreetofoursmall-groupswithapproximately4–8studentspergroup.Smallergroupsarepreferredtoallowmoreopportunitiesforparticipation,questions,andcorrectivefeed-back(Vaughn&Linan-Thompson,2003;Vaughnet.al.,2001).Explicitinstructionmaybemoreefficientandeffectiveconductedwithsimilarskillgroupings,whereasmixed-skillgroupsworkbetterforpracticeactivitiessostudentscanassisteachother.

StepThreeinvolvesmanagingresourcessuchasinstructionaltime,pacing,andstudentwork.Teachersadjusttheirdailyschedulestoalternatetimeperiodsforwhole-classandsmall-groupinstruction.Mostdailyschedulesbeginwitha10-to15-minuteoverviewusedbyteacherstointroduceorreviewvocabularywords,ormodel,teach,andclarifyexpectationsforperformance.Aftertheoverview,a20-minutetimeperiodforsmall-groupworkbegins.Assignedcurriculaandactivitiesarebasedonneedsidentifiedbyassess-ments.StudentsparticipateinpracticeactivitiesusingWorkContractstohelporganizetheirwork,monitortheirprogress,andcompleteassign-ments.Onesmall-groupworkswiththeteacherwhoprovidesskills-focusedinstructionspecifictoneed,i.e.,differentiatedinstruction.Otherstu-dentsattendworkstationsparticipatingasstudygroupsandcompletingguidedpracticeactivities,oraworktableusedtobeginhomeworkassign-mentswithsupport,orcompletetasksindepen-dentlyatdesks.

StepFourinvolvescreatingarotationchartthatidentifiessmall-groupmembershipsandcom-municateshowthegroupswillparticipateattheworkstations,worktable,orteachingtable.Teach-ersconstructtherotationcharttoreflecthowmanysmall-groupswillbeformedandwhatac-tivitiesareavailable.Mostrotationchartsincludeanareaforsmall-groupskillsinstructionwiththe

D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s

6642_Vicki_Gibson_6pg.indd 2 12/1/08 3:44:12 PM

teacher,workstationsforsmall-grouppracticeactivitiesorhomework,andaworktableforpartnerorindependentpractice.Computers,languageandliteracycenters,andwritingandspellingworkstationsarecommonlyusedforsmall-grouppracticeactivities.

Aftereachsmallgrouphasattendedases-sionwiththeteacher,awhole-groupactivitymaybeusedforquicklessonorreviewortosummarizetheday,connectexperiences,reviewvocabularyandkeyconcepts,andanswerquestions.Dependingontimesched-ules,small-grouptimeperiodsmaybeusedconsecutively,onesmall-groupactivityfollow-inganother.Often,teachersgroupwithinalargegroupbyassigningorusingpartnerstorepeatinformation,restateforclarification,oraskaquestiontomonitorcomprehension.Basedonobservationsinwhole-andsmall-groups,teachersdeterminewhatadditionalinstructionisneeded.Membershipsforsmall-groupsmayneedmodificationtoaccommo-datechangingneedsforcompatibilityorskilldevelopment.

Insummary,differentiatinginstructionin-cludes:

• Changingthebehaviorsofteachingandinstructionaldeliverytoaddressstudentvariance.

• Implementingdata-informedwhole-classandsmall-groupinstruction.

• Usingleveledcurriculathatenhancesstudentlearningandachievement.

• Usingflexiblegroupingpatternsthataresensitivetostudentprogress.

Differentiatinginstructionrequiresachar-teredcourseforsuccessfulimplementationanditmustbeaddressedfirstasatrain-ingandmanagementissue.Administratorsmustprovideteachertrainingandsupportthatidentifieshowtomanagegroupingfordifferentiatinginstructionandhowtoimple-mentitsuccessfullyovertime,notatonce.Areviewofcurrentteachingpracticeswillbe

necessarytodetermineneeds.Differentiat-ingassessmentmayneedreflectiontode-termineifpacingschedulesorperformanceexpectationsarereasonableandattainable.Evaluatingprogrameffectivenessisneededtodetermineifcurriculumsusedinclassroomsareevidence-based,effective,andcapableofprovidingmultipletoolsandmaterialsforusewithvaryingstudentperformancelevels.Iden-tifyingchangesthatmaybeneededinclass-roomstructureandenvironmentsisnecessarysosmall-group,differentiatedinstructioncanoccur.

Instructionbecomesdifferentiatedwhenteachingisindividualized,sensitive,andresponsivetoneeds,bothteachersandstudents.Practiceactivitiesthatincorporatestudentcollaboration,studygroups,anddis-cussionswillenhancecomprehensioniftheyareusedtoincreasestudentengagement,interests,andmotivationtocompletetasks.Differentiatinginstructionmeansteachingdifferently,usinganinstructionmanagementsystemthatcreatesclassroomsandteachingbehaviorsthatsupportwholeclassandsmall-grouplessons,collaborativelearning,andindependentpracticeAFTERstudentsreceivesufficientinstructionandhaveparticipatedinguidedpracticesBEFOREtheyareexpectedtoworkindependently.

Biography

VickiGibson,Ph.D.hasbeenteachingstu-dents,trainingteachers,writingcurriculum,anddirectinginstructionsince1975.SheistheCurriculumDirectorforLongmireLearn-ingCenter,Inc.(LLC),aprivateeducationalfacilityservingfamilieswithchildrenages2–8years.SheistheChairmanandCEOofGib-sonHasbrouck&Associates,aneducationalconsultingfirmthatprovidesintenseprofes-sionaldevelopment.Priortobecomingacon-sultantandauthor,Dr.Gibsonownedthreeprivateschools,servingchildrenages2-12years.ShetaughtandlecturedfortenyearsatTexasA&MUniversity,andspenttenyearsteachinginpublicschoolsasaKindergartenteacher,specialeducationresourceteacher,

D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s

6642_Vicki_Gibson_6pg.indd 3 12/1/08 3:44:12 PM

D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M sD i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s

adaptivebehaviorspecialist,andlearningdis-abilityspecialist.Dr.GibsonreceivedherB.S.,M.S.,andPh.D.atTexasA&MUniversity.

Dr.Gibsonisawell-respected,nationallyrec-ognizedauthorandspeakerondifferentiatinginstruction,earlychildhoodcurriculumdesignandmethodology,classroommanagement,andusingeffectiveinstructionalstrategiesforemergingandlow-performingstudents.Sheprovidesconsultationandconductsworkshopsforteachers,administrators,andparents.SheauthoredWe Can!,acompre-hensiveearlychildhoodcurriculum,asupple-mentalLanguageArtsprogramtitledLetter Sounds & Strokes,andapre-writingprogram,I Can Draw,allpublishedbySoprisWest.Dr.Gibsonco-authoredRoad to Reading,aReadingandCollaborationTrainingProgramforTeachersofAt-RiskReadersinGrades3–8.Sheco-authoredabookwithJanHasbrouck,PH.D.,titledDifferentiated Instruction: Group-ing for Success,publishedbyMcGraw-HillHigherEducation.Dr.GibsonisanauthorforTreasures,theK-6readingprogrampublishedbyMacmillan/McGraw-Hill.

References

Evertson,C.M.,E.T.Emmer,andM.E.Worsham,Classroom Management for El-ementary Teachers,6thed.,Allyn&Bacon,Boston,2003.

Evertson,C.M.andA.Harris,“Supportformanaginglearning-centeredclassrooms:Theclassroomorganizationandmanage-mentprogram,”inH.J.Freiberg(ed.),Be-yond Behaviorism: Changing the Classroom Management Paradigm,Allyn&Bacon,Boston,1999,pp.59-74.

Gersten,R.,S.Vaughn,D.Deshler,andE.Schiller,“WhatWeKnowAboutUsingResearchFindings:ImplicationsforImprov-ingSpecialEducationPractice,”Journal of Learning Disabilities,30(5),1997,pp.466–476.

Gibson,V.andJ.Hasbrouck,Differentiated Instruction: Grouping for Success,McGraw-HillHigherEducation,2008.

Lou,Y.,P.C.Abrami,J.C.Spence,C.Poulsen,B.Chambers,andS.D’Appolonia,“Withinclassgrouping:Ameta-analysis,”Review of Educational Research,66(4),1996,pp.423-458.

Marzano,R.,J.S.Marzano,andD.J.Picker-ing,Classroom Management that Works: Research-Based Strategies for Every Teacher,AssociationforSupervisionandCurriculumDevelopment,Alexandria,Virginia,2003.

Marzano,R.,J.S.Norford,D.E.Paynter,D.J.Pickering,andB.B.Gaddy,A Handbook for Classroom Instruction that Works,Associa-tionforSupervisionandCurriculumDevel-opment,Alexandria,Virginia,2001.

Mathes,P.G.andL.S.Fuchs,“Peer-MediatedReadingInstructioninSpecialEducationResourceRooms,”Learning Disabilities Re-search and Practice,8,1994,pp.233-243.

McIntosh,R.,S.Vaughn,J.Schumm,D.Haager,andO.Lee,“ObservationsofStu-dentswithLearningDisabilitiesinGeneralEducationClassrooms,”Exceptional Chil-dren,60(3),1993,pp.249-261.

McLeod,J.,J.Fisher,andG.Hoover,The Key Elements of Classroom Management: Man-aging Time and Space, Student Behavior and Instructional Strategies,AssociationforSupervisionandCurriculumDevelopment,Alexandria,Virginia,2003.

Moody,S.,S.Vaughn,andJ.Schumm,“In-structionalGroupingforReading:Teach-ers’Views,”Remedial & Special Education,18(6),1997,pp.347-356.

Rothstein-Fisch,C.andE.Trumbull,Managing Diverse Classroom: How to Build on Stu-dents’ Cultural Strengths,AssociationforSupervisionandCurriculumDevelopment,Alexandria,Virginia,2008.

6642_Vicki_Gibson_6pg.indd 4 12/1/08 3:44:13 PM

D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s

RD 08 W 6642

D i f f e r e n t i a t i n g i n s t r u c t i o n : M a k i n g i t H a p p e n i n c l a s s r o o M s

Taylor,B.M.,P.D.Pearson,D.S.Peterson,andM.C.Rodriquez,“LookingInsideClassrooms:Re-flectingonthe“How”asWellasthe“What”inEffectiveReadingInstruction,”The Reading Teacher,56(3),2001,pp.270–279.

Tomlinson,C.A.,How to Differentiate Instruction in Mixed-Ability Classrooms,2nded.,Associa-tionforSupervisionandCurriculumDevelop-ment,Alexandria,Virginia,2001.

Tomlinson,C.A.andS.D.Allan,Leadership for Differentiating Schools and Classrooms,Asso-ciationforSupervisionandCurriculumDevelop-ment,Alexandria,Virginia,2000.

Tomlinson,C.andC.Eidson,The Differenti-ated Classroom: Responding to the Needs of All Learners,AssociationforSupervisionandCurriculumDevelopment,Alexandria,Virginia,1999.

Tomlinson,C.andC.Eidson,Differentiation in Practice: A Resource Guide for Differentiating Curriculum: Grades K–5,AssociationforSuper-visionandCurriculumDevelopment,Alexan-dria,Virginia,2003.

Tomlinson,C.A.andJ.McTighe,Integrating Dif-ferentiated Instruction and Understanding by Design: Connecting Content and Kids,Associa-tionforSupervisionandCurriculumDevelop-ment,Alexandria,Virginia,2006.

Vaughn,S.,M.T.Hughes,S.W.Moody,andB.Elbaum,“InstructionalGroupingforReadingforStudentswithLD:ImplicationsforPractice.” Intervention in School and Clinic,36(3),2001,pp.131–137.

Vaughn,S.andS.Linan-Thompson,Group Sizes and Time Allotted to Intervention: Effects for Students with Reading Difficulties,inB.Foor-man(ed.),Preventing and Remediating Read-ing Difficulties: Bringing Science to Scale,YorkPress,Baltimore,Maryland,2003.

Vaughn,S.andS.Linan-Thompson,Research-Based Methods of Reading Instruction: Grades K–3,AssociationforSupervisionandCurricu-lumDevelopment,Alexandria,Virginia,2004.

6642_Vicki_Gibson_6pg.indd 5 12/1/08 3:44:13 PM