Osterhaus C, Koerber S, Sodian B. Experimentation skills in primary school: an inventory of children’s understanding of experimental design. FLR [Internet]. 2016 Jan. 19 [cited 2025 Feb. 28];3(4):56-94. Available from: https://flr.journals.publicknowledgeproject.org/flr/index.php/journal/article/view/220