Text3Ateacherwhocontinuallydrawsattentiontorewardsorwhohandsouthighgradesforordinaryachievement___11__withuninspiredstudents,Esenbergerholds.Asanexampleofthelatterpoint,henotes__12__effortsatmajoruniversitiestotightengradingstandardsand__13__fallinggrades.Inearliergrades,theuseofso-calledtokeneconomics,inwhich__14__handlechallengingproblemsandreceiveperformance-basedpointstowardvaluedrewards,showspromiseinraising__15__,theDelawarepsychologistclaims.11.