building on what students already know

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(c) Centre for Research in Mathematics Education, University of Nottingham 2010 1 BUILDING ON WHAT STUDENTS ALREADY KNOW How can I respond to students in ways that improve their learning? Introduction Inquiry-based teaching assumes that students do not arrive at sessions as ‘blank slates’, but as actively thinking people with a wide variety of skills and conceptions. Research shows that teaching is more effective when it assesses and uses prior learning so that the teaching may be adapted to the needs of students (Black & Wiliam, 1998). Prior learning may be uncovered through any activity that offers students opportunities to express their understanding and reasoning. It does not require more testing. For example, it can take the form of a single written question given at the beginning of a session to elicit a range of explanations that may then be discussed. This process, often referred to as formative assessment, may be defined as: "… all those activities undertaken by teachers, and by their students in assessing themselves, which provide information to be used as feedback to modify the teaching and learning activities in which they are engaged. Such assessment becomes ‘formative assessment’ when the evidence is actually used to adapt the teaching work to meet the needs." (Black & Wiliam, 1998 para, 91) This module considers the different ways this can be done and focuses on the following questions: How can problems be used to assess performance? How can this assessment be used to promote learning? What kinds of feedback are most helpful for students and which are unhelpful? How can students become engaged in the assessment process? Activities Activity A: Introducing formative assessment .................................................................................... 3 Activity B: Teachers' own experiences of formative assessment ....................................................... 4 Activity C: Principles for formative assessment .................................................................................. 6 Activity D: Analyse students’ responses to problem-solving tasks ..................................................... 8 Activity E: Analyse students’ responses to concept-focused tasks ................................................... 10 Activity F: Observe formative assessment in action ......................................................................... 12 Activity G: Plan and report back on an assessment lesson ............................................................... 13 Activity H: Consider the effects of feedback on student learning .................................................... 14 Acknowledgement: In preparing this material, we acknowledge the permissions given by the Bowland Charitable Trust to adapt the professional development resources, Bowland Maths, that they had previously funded us to produce for the UK. This includes many of the handouts and most of the video extracts. Additional resources were also adapted from Improving Learning in Mathematics, a government funded program in the UK. The original sources are: Swan, M; Pead, D (2008). Professional development resources. Bowland Maths Key Stage 3, Bowland Trust/ Department for Children, Schools and Families. Obtainable in the UK from: http://www.bowlandmaths.org.uk. Swan, M; (2005). Improving Learning in Mathematics, challenges and strategies, Department for Education and Skills Standards Unit. Obtainable in the UK from http://tlp.excellencegateway.org.uk/pdf/Improving_learning_in_maths.pdf

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Page 1: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 1

BUILDINGONWHATSTUDENTSALREADYKNOW

HowcanIrespondtostudentsinwaysthatimprovetheirlearning?

Introduction

Inquiry-basedteachingassumesthatstudentsdonotarriveatsessionsas‘blankslates’,butasactivelythinkingpeoplewithawidevarietyofskillsandconceptions.Researchshowsthatteachingismoreeffectivewhenitassessesandusespriorlearningsothattheteachingmaybeadaptedtotheneedsofstudents(Black&Wiliam,1998).Priorlearningmaybeuncoveredthroughanyactivitythatoffersstudentsopportunitiestoexpresstheirunderstandingandreasoning.Itdoesnotrequiremoretesting.Forexample,itcantaketheformofasinglewrittenquestiongivenatthebeginningofasessiontoelicitarangeofexplanationsthatmaythenbediscussed.Thisprocess,oftenreferredtoasformativeassessment,maybedefinedas:

"…allthoseactivitiesundertakenbyteachers,andbytheirstudentsinassessingthemselves,whichprovideinformationtobeusedasfeedbacktomodifytheteachingandlearningactivitiesinwhichtheyareengaged.Suchassessmentbecomes‘formativeassessment’whentheevidenceisactuallyusedtoadapttheteachingworktomeettheneeds."(Black&Wiliam,1998para,91)

Thismoduleconsidersthedifferentwaysthiscanbedoneandfocusesonthefollowingquestions:

• Howcanproblemsbeusedtoassessperformance?• Howcanthisassessmentbeusedtopromotelearning?• Whatkindsoffeedbackaremosthelpfulforstudentsandwhichareunhelpful?• Howcanstudentsbecomeengagedintheassessmentprocess?

ActivitiesActivityA: Introducingformativeassessment....................................................................................3ActivityB: Teachers'ownexperiencesofformativeassessment.......................................................4ActivityC: Principlesforformativeassessment..................................................................................6ActivityD: Analysestudents’responsestoproblem-solvingtasks.....................................................8ActivityE: Analysestudents’responsestoconcept-focusedtasks...................................................10ActivityF: Observeformativeassessmentinaction.........................................................................12ActivityG: Planandreportbackonanassessmentlesson...............................................................13ActivityH: Considertheeffectsoffeedbackonstudentlearning....................................................14Acknowledgement:Inpreparingthismaterial,weacknowledgethepermissionsgivenbytheBowlandCharitableTrusttoadapttheprofessionaldevelopmentresources,BowlandMaths,thattheyhadpreviouslyfundedustoproducefortheUK.Thisincludesmanyofthehandoutsandmostofthevideoextracts.AdditionalresourceswerealsoadaptedfromImprovingLearninginMathematics,agovernmentfundedprogramintheUK.Theoriginalsourcesare:Swan,M;Pead,D(2008).Professionaldevelopmentresources.BowlandMathsKeyStage3,BowlandTrust/DepartmentforChildren,SchoolsandFamilies.ObtainableintheUKfrom:http://www.bowlandmaths.org.uk.Swan,M;(2005).ImprovingLearninginMathematics,challengesandstrategies,DepartmentforEducationandSkillsStandardsUnit.ObtainableintheUKfromhttp://tlp.excellencegateway.org.uk/pdf/Improving_learning_in_maths.pdf

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(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 2

Relatedresearchtohelpyourplanningforthismodule.Black,P.,&Wiliam,D.(1998).Insidetheblackbox:raising

standardsthroughclassroomassessment.King'sCollegeLondonSchoolofEducation.NowpublishedbyGLAssessment:

http://shop.gl-assessment.co.uk

Thisshortbookletoffersasummaryoftheextensiveresearchliteratureintoformativeassessment.Itshowsthatthereisclearevidencethatimprovingformativeassessmentraisesstandards,andoffersevidenceshowinghowformativeassessmentmaybeimproved.Thisbookletisessentialreadingforallteachers.

Black,P.,&Harrison,C.(2002).Workinginsidetheblackbox:Assessmentforlearningintheclassroom.King'sCollegeLondonSchoolofEducation.NowpublishedbyGLAssessment:

http://shop.gl-assessment.co.uk

Inthisbooklet,theauthorsdescribeaprojectwithteachersinwhichtheystudiedpracticalwaysofimplementingformativeassessmentstrategiesandtheeffectthishadonlearning.Thesectiononfeedbackandmarking(pages8-9)areparticularlyrelevanttothismodule.

Black,P.,Harrison,C.,Lee,C.,Marshall,B.,&Wiliam,D.(2003).Assessmentforlearning:Puttingitintopractice.Buckingham:OpenUniversityPress.

ThisbookgivesafulleraccountoftheearlierbookletsInsidetheblackboxandWorkinginsidetheblackbox.Itdiscussesfourtypesofaction:questioning,feedbackbymarking,peer-andself-assessmentandtheformativeuseofsummativetests.Thesectiononfeedbackandmarking(pages42-49)isparticularlyrelevanttothismodule,whilethesectiononpeerandself-assessment(pp49-53)isrelevantforthenextCPDmodule.

Hodgen,J.,&Wiliam,D.(2006).Mathematicsinsidetheblackbox.

King'sCollegeLondonSchoolofEducation.NowpublishedbyGLAssessment:

http://shop.gl-assessment.co.uk Thisbookletappliestheabovefindingsspecificallyto

Mathematics.ItconsiderssomeprinciplesforMathematicslearning,choiceofactivitiesthatpromotechallengeanddialogue,questioningandlistening,peerdiscussion,feedbackandmarking,andselfandpeerassessment.Thisbookletisessentialreadingforallmathematicsteachers.

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(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 3

ACTIVITYA:INTRODUCINGFORMATIVEASSESSMENT

Minimumtimeneeded:10minutes.

Thedifferenttypesandpurposesofassessment.Inviteparticipantstodiscussthefollowingissues:

• Whydoyouassessstudents?• Whatdifferentpurposesdoyourassessmentsserve?Makealist.

Theirlistofreasonsmightinclude:diagnosingdifficulties;celebratingachievement;motivatingstudents;selectingstudentsforclasses;maintainingrecordstokeepteachersandparentsinformedofprogress;toassessteachingmethods.Tosummarize,therearetwomainpurposesofassessment:

• Summativeassessment-tosummariseandrecordoverallachievementattheendofacourse,forpromotionandcertification.Most‘highstakes’testsandexternalexaminationsaredesignedforthispurpose.Summativeassessmentisalsousedtoevaluatetherelativeeffectivenessofaparticularcourse,teachingmethod,orevenaninstitution.

• Formativeassessment–torecogniseachievementsanddifficultiesatthebeginningorduringacourse,sothatteachersandstudentscantakeappropriateaction.Thistypeofassessmentformsanintegralpartofalllearning.

Thepotentialofformativeassessmenttoimprovelearning.Brieflymentiontheresearchevidencethatsetsoutthecaseforformativeassessment.ThisissummarizedbyBlackandWiliaminseveralaccessiblepublicationsforteachers(seeopposite),mostofwhicharefreelydownloadableontheinternet.Theseresearcherssetouttofindoutwhetherornotimprovingformativeassessmentimproveslearning.“Wecheckedmanybooksandnineyears'worthofmorethan160journals,andearlierreviewsofresearch.Thisprocessyielded580articlesorchapterstostudy.Wepreparedareviewusingmaterialfrom250ofthesesources.All…studiesshowthat…strengthening…formativeassessmentproducessignificant,andoftensubstantial,learninggains.Thesestudiesrangeoverages,acrossseveralschoolsubjects,andoverseveralcountries…”(BlackandWiliam,1998).1Thismodulewillexaminetheimplementationofformativeassessment,basedonthisandotherresearch.Asecondmodulewillexploretheroleofselfandpeerassessment.

1PaulBlackandDylanWiliam,"AssessmentandClassroomLearning,"AssessmentinEducation,March1998,pp.7-74.

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(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 4

ACTIVITYB:TEACHERS'OWNEXPERIENCESOFFORMATIVEASSESSMENT

Minimumtimeneeded:10minutes.

Whatdoteachersknowabouttheirstudentsandwhatconsequentialactiondotheytake?Askparticipantstoworkinpairs,consideringthefollowingquestions.

• Thinkoftwostudentsinyourclass,onewhoisparticularlystrongandonewhoisfindingtheworkverydifficult.Takeitinturnstodescribethestudents'strengthsanddifficultiestoyourpartner,inasmuchdetailaspossible.

• Howdidyoubecomeawareofthesestrengthsanddifficulties?Onwhatevidencedoyoubaseyourjudgements?Testresults?Memoriesoforalresponsesduringlessons?Observationsofthestudentworking?Writtenwork?

• Inwhatwaysdoyourassessmentsofthesestudentsaffectyourlessonplanning?Giveexamples.

Whatdifficultiesdoteacherencounter?IssueparticipantswithcopiesofHandout1:Difficultieswithformativeassessment.

• Howfararethecriticismsonthehandoutvalidinyourcontext?• Ifanyare,thenwhatmaybedoneaboutthem?

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(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 5

Handout1 Difficultieswithformativeassessment

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1 Black, P., & Wiliam, D. (1998). Inside the black box : raising standards through classroom assessment. London: King's College London School of Education 1998.

Page 6: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 6

ACTIVITYC:PRINCIPLESFORFORMATIVEASSESSMENT

Minimumtimeneeded:20minutes.

IssueparticipantswithacopyofHandout2.Theideaspresentedherearealldrawnfromresearchintoformativeassessment.

• BearinginmindthedifficultiesdiscussedinActivityB,howwouldyousuggestthatyourformativeassessmentpracticesbeimproved?

• DiscusstheprinciplesoutlinedonHandout2.o Whichofthesedoyoucurrentlyuseinyourownteaching?o Whichdoyoufindmostdifficult?Why?

• Whatotherprinciplesdoyouthinkareimportant?

IssuecopiesofHandout3.

"It'sallverywelltellingustoassessourstudents,buthowcanabusyteacherknowwhatisgoingoninside30individualheads?"

• Howwouldyouanswerthisteacher?• Whatstrategiesdoyouhaveforfindingoutwhat

studentsarethinkinginyourlessons?• DiscussthetwosuggestionsshownonHandout3,

andwatchthemoviestoseetheseinaction.• Suggestsomefurtherstrategiesformaking

reasoningmoreevident.

ThetwostrategiesdescribedonHandout3andonthemoviesaccompanyingthisactivitymayhelptomakereasoningmore'visible'.Mini-whiteboardsareanindispensableresourceforthefollowingreasons:

• Whenstudentsholdtheirideasuptotheteacher,itispossibletoseeataglancewhateverystudentthinks.

• Duringwholeclassdiscussions,theyallowtheteachertoasknewkindsofquestion(typicallybeginning:‘Showmeanexampleof....’).

• Theyallowstudentsto,simultaneously,presentarangeofwrittenand/ordrawnresponsestotheteacherandtoeachother.

Postersarealsoapowerfulwayofhelpingstudentstoexternalisetheirthinking.Thisusedoesnotrequire'polished','complete','attractive'productsbutrathertheyshouldbeseenasworkingdocuments.Perhapsthesimplestwayofusingaposterisforstudentstosolveaproblemcollaboratively,explainingthethoughtprocessesinvolvedateverystep.Aseconduseofpostersistofindoutwhattheyalreadyknowaboutagiventopic.InthediagramshownonHandout2,theteacheraskedstudentstowritedownalltheyknewabouty=2x-6.Asaclass,thediagramwasdevelopedonthewhiteboard.Studentswerethengivenavarietyofequations(thelevelofchallengewasvariedappropriately)andwereaskedtoproducetheirownposter.Thediscussionenabledtheteachertoassesshowmuchlearnersknewaboutequationsandhowwelltheywereabletolinktheideastogether.

Page 7: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 7

Handout2:Principlesforformativeassessment

Handout3: Makingreasoningvisible.

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Page 8: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 8

ACTIVITYD:ANALYSESTUDENTS’RESPONSESTOPROBLEM-SOLVINGTASKS

Minimumtimeneeded:20minutesHandout4presentsthreeproblemstogetherwithfourstudentresponsesoneach.Thetasksare:CountingTrees,CatsandKittens,SecurityCameras.

• Readthroughallthreetasksthenchooseonetaskthatwillbemostsuitableforaclassyouwillsoonteach.Ifyouareworkingonthismoduleinagroup,itwillbehelpfulifeachparticipantchoosesthesameproblem,asthiswillfacilitatethefollow-updiscussion.

• Considerthefourstudentresponses.Whatdoeseachstudent’sresponsetellyouabout

hisorhercapacitytouseeachoftheprocesses:represent,analyse,interpretandevaluate,communicateandreflect?

Handout5offerssomecommentsonstudents’responsestoeachofthetasks.

• Ifyouweretheteacherofthesestudents,whatfeedbackwouldyougivethem,tohelpthemimprovetheirresponses?Trytoframethishelpintheformoforalquestionsyoucouldaskintheclassroom.YoumayfindithelpfultorefertothegenericquestionsgivenonHandout6.

• Watchthevideoofthreeteachersdiscussingthefeedbacktheygaveonthethreeproblems.

Page 9: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 9

Handout4: Assessmenttasksandsampleresponses

Handout5: Improvingstudents'responsesthroughquestioning

Handout6: Suggestionsforquestions

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What questions could you ask Laura that would help her improve her response?

Sample response: Jenny

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Sample response: Woody

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Sample response: Amber

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(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 10

ACTIVITYE: ANALYSESTUDENTS’RESPONSESTOCONCEPT-FOCUSEDTASKS

Minimumtimeneeded:20minutesOnHandout7,wepresentfourmathematicaltopicsandsomesamplestudentworkoneachone.Askparticipantstoassesseachresponseandtrytoidentifythereasoningthatliesbehindeachone.

• Whatdoesthestudentappeartounderstand?Whereisyourevidence?• Listtheerrorsanddifficultiesthatarerevealedbyeachresponse.• Trytoidentifythethinkingthatliesbehindeacherror.• Whatfeedbackwouldyougivetoeachstudent?

Therearetwocommonwaysofreactingtopupils'errorsandmisconceptions:(i)Avoidthemwheneverpossible:"IfIwarnpupilsaboutthemisconceptionsasIteach,theyarelesslikelytohappen.Preventionisbetterthancure."(ii)Usethemaslearningopportunities:"Iactivelyencouragepupilstomakemistakesandlearnfromthem.

• Whatisyourview?

Routinepracticeonstandardproblemsdoeslittletohelpstudentsovercomecommonmistakesandmisconceptionsinmathematics.Thisisparticularlytruewhenteacherstrytoavoiddifficultiesarisingbybeginningeachlessonwithexplanationsanddemonstrationsandfollowingthiswithcarefullygradedquestions.Handout8isaone-pageresearchreviewbyAskewandWiliam.ThisdescribessomeresearchthatwasconductedinBritainoverthepast30yearsondealingwithstudenterrorsanddifficulties.Whatdoteachersfeelaboutthedilemmaspresentedinthispaper?-isitpossibletopresentexampleswhererulesdonotwork?-doteacherssharetheviewthatitiscounter-productivetoteachsimplerexamplesbeforemorecomplexexamples?

Page 11: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 11

Handout7: Assessmenttasksandsampleresponsesforconcepts

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Page 12: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 12

ACTIVITYF: OBSERVEFORMATIVEASSESSMENTINACTION

Timeneeded:15minutes.

Inthisactivity,youareprovidedwithvideoextractsofAndrew,DominicandAmyexploringhowformativeassessmentmaybeusedtopromotestudentslearning.TheyareusingthethreetasksfromActivityD.Inanearlierlesson,theseteachershadaskedstudentstositindifferentplacesandattemptoneofthetasksindividually,withnohelp.Theythencollectedintheirstudents'responses,assessedtheworkqualitativelyandpreparedwrittenfeedbackintheformofquestions.Thefilmclipsyouareabouttoseearetakenfromthefollow-uplesson.Studentshavereturnedtotheirnormalplacesandmosthavesolutionsthataredifferenttothoseoftheirpartners.Watchthevideoandconsider:

• Whatdifferentkindsofassessmentcanyousee?• Whatisthepurposeofeachkindofassessment?• Whatdoboththeteachersandstudentslearn?

Inthevideo,youwillsee:

• Andrewexploringhowstudentsrespondtohisfeedbackonthe"countingtrees"problem;• Amylisteningto,thenquestioningindividualsastheytrytosharetheirideasandproduce

jointsolutionstothe"securitycamera"problem;• Dominiclisteningtopresentationsfromstudentsontheirmethodsandreasoningforthe

"catsandkittens"problem;• Amyconcludingherlessonbyaskingstudentstodescribehowtheyhaveusedherfeedback

toimprovetheirwork.

Page 13: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 13

ACTIVITYG:PLANANDREPORTBACKONANASSESSMENTLESSON

Minimumtimeneeded: 30minutesbeforethelesson 20minutesforthepre-lessonassessment 30minutestopreparefeedback 60minutesforthelesson 15minutesforreportingback

PlanningthelessonPlanyourownlessonusingoneoftheproblems.

• Planatimeforstudentstotackletheproblemontheirownwithouthelp.

• Planhowyouwillassessthiswork,givefeedbackandconductafollowuplesson.

• Collectsamplesofstudents'worktoshowhowtheirthinkinghaschanged.Thesewillbediscussedatthefollow-upsession.

Tohelpyourplanning,youmaynowliketowatchthe10-minutevideothatshowsAndrewteachingtheCountingTreesproblemfromActivityD.HeisfollowingthelessonplanonHandout9.

Andrew'slesson

Thepatternofactivitiesonhandout9isasfollows:

• Givetheproblembeforethelessonandaskstudentstoattemptit.(20minutes)

• Collectintheworkandpreparesomeconstructive,qualitativefeedback.

• Inthefollow-uplesson,reintroducetheproblemtotheclass.(5minutes)

• Studentsworkalone,respondingtothefeedbackusingminiwhiteboards.(5minutes)

• Studentsworkinpairstoimprovetheirsolutions.(10minutes)• Studentssharetheirapproacheswiththeclass.(15minutes)• Studentscontinuewiththeproblemorextendtheproblem.(20

minutes)

Handout9:Aformativeassessmentlessonplan

ReportingbackonthelessonAfteryouhavetaughtthelesson,reflectonwhathappenedwithagroupofcolleagues.Takeitinturnstosharestoriesoftheassessmentstrategiesyouused.

• Howdidyoucollectandassessevidenceofyourstudents'work?• Whatdidyoulearnfromthisevidence?• Whatdidstudentslearnfromthefollow-uplesson?• Whataretheimplicationsforyoumathematicsteachingmoregenerally?

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Page 14: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 14

ACTIVITYH:CONSIDERTHEEFFECTSOFFEEDBACKONSTUDENTLEARNING

Timeneeded:20minutes.

Sofarwehavefocusedontheteachers’roleinprovidingassessmentfeedbacktostudents.Inthisactivitywewillconsidertheusestudentsmakeofdifferenttypesoffeedbackandtheimpactthishasontheirlearning.WatchthevideoofAndrew'sstudentsastheydiscusstheimpactofassessmentfeedbackontheirlearning.

• Whichoftheircommentsstrikeyouasparticularlyperceptiveandimportant?

• Whataretheimplicationsoftheircomments?

Handout10presentssomeresultsofresearchfromBlackandWiliam(1998)intotherelativemeritsoffeedingbackassessmentinformationtostudentsindifferentforms.Inparticularitcomparestheeffectsoffeedingbackquantitativeinformationintheformofmarks,levelsandrankingswiththeeffectsofofferingqualitativeinformationintheformofspecific,content-focusedfeedback.Comparethestudents'commentswiththeresearchquotesgivenonHandout9.Thedangersofgivingmarks,levels,rewardsandrankings

• Whataretheimplicationsofthisforyourpractice?• Whatwouldhappenifyoustoppedgivingmarksorlevelsonpupils’work?• Whyaresomanyteachersresistanttomakingthischange?

Theadvantagesofgivingclear,specific,content-focusedfeedback

• What are the implications of this for your practice? • Does this kind of feedback necessarily take much longer to give?

Researchshowsthatstudentsbenefitmostfromfeedbackthat:• Focusesonthetask,notongradesorscores.• Isdetailedratherthangeneral.• Explainswhysomethingisrightorwrong.• Isrelatedtoobjectives• Makesclearwhathasbeenachievedandwhathasnot• Suggestswhatthestudentmaydonext• OffersspecificstrategiesforimprovementConcludethismodulebydiscussingsomewaysofapplyingwhatyouhavelearnedinthisPDmoduletotheothermathematicslessonsthatyouteach.

• Howcouldyouinvolvepupilsinimprovingyourassessmentpractices?

Page 15: BUILDING ON WHAT STUDENTS ALREADY KNOW

(c)CentreforResearchinMathematicsEducation,UniversityofNottingham2010 15

Handout10:Theeffectsoffeedbackonstudentlearning

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