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van den Heuvel-Panhuizen, Marja; Elia, Iliada; Robitzsch, Alexander – ZDM: The International Journal on Mathematics Education, 2015
This study aimed at gaining further understanding of kindergartners' performance in imaginary perspective-taking (IPT) by examining whether they can imagine "what" is visible from a particular point of view (IPT type 1: visibility) and "how" an object or scene will look from a particular point of view (IPT type 2: appearance).…
Descriptors: Perspective Taking, Kindergarten, Imagination, Foreign Countries
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Kolovou, Angeliki; van den Heuvel-Panhuizen, Marja; Koller, Olaf – Journal for Research in Mathematics Education, 2013
This study investigated whether an intervention including an online game contributed to 236 Grade 6 students' performance in early algebra, that is, solving problems with covarying quantities. An exploratory quasi-experimental study was conducted with a pretest-posttest-control-group design. Students in the experimental group were asked to solve…
Descriptors: Intervention, Algebra, Student Improvement, Problem Solving
van den Heuvel-Panhuizen, Marja – Mathematics Education Research Journal, 2008
This article discusses students' perceptions as a source for understanding education. It addresses what didactically experienced children, called "didactikids", taught us about the empty number line as a didactical model for teaching whole number calculations. The article mainly reports on a student consultancy study carried out in the…
Descriptors: Foreign Countries, Elementary School Mathematics, Numbers, Number Concepts