Rational numbers and ratio variables

Source
Matematika v soli - ISSN 1318-010X-20:1/2 (2014) p. 28-42
Author(s)

Calculating areas by counting nails

Source
1st International Conference on Learning and Teaching Mathematics, Maribor, August 23 and 24, 2012- () p. 633-656

Today champions in math, tomorrow in equal chances : a short overview of strenghts and weaknesses of Flemish education

Source
1st International Conference on Learning and Teaching Mathematics, Maribor, August 23 and 24,2012- () p. 265-275