Milo B. Reactie op boekbespreking door J Nelissen van “Mathematics instruction for special-needs students. Effects of instructional variants in addition and substraction up to 100”1. Pedagog. Stud. [Internet]. 2004 Jan. 1 [cited 2026 Jan. 31];81(1). Available from: https://pedagogischestudien.nl/article/view/14619