Howie, Sarah J.Plomp, Tjeerd2009-02-262009-02-262008Howie, S & Plomp, T 2008, 'Introduction: narrowing the achievement gap?', Studies in Educational Evaluation, vol. 34, no. 2, pp. 53-55. [www.elsevier.com/stueduc]0191-491X10.1016/j.stueduc.2008.04.001http://hdl.handle.net/2263/9013Editorial to the special number: Narrowing the Gap.enElsevierEducational evaluationTIMMS 2003Educational evaluationPostprint Article