Da Costa, Melissa A.; Kruger, Esedra; Kritzinger, Alta M. (Aletta Margaretha); Graham, Marien Alet(African Online Scientific Information Systems, 2019-11)
Engelbrecht, Johann; Harding, Ansie; Potgieter, Marietjie(Southern African Association for Research in Mathematics, Science and Technology Education, 2014)
Botha, Hanlie; Maree, J.G. (Kobus); Stols, Gerrit Hendrikus(Faculty of Education, University of the Free State (since April 2010) For older articles: Faculty of Education, University of Pretoria, 2013-12)