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Direct linkDubinsky, Ed; Arnon, Ilana; Weller, Kirk – Canadian Journal of Science, Mathematics and Technology Education, 2013
In this article, we obtain a genetic decomposition of students' progress in developing an understanding of the decimal 0.9 and its relation to 1. The genetic decomposition appears to be valid for a high percentage of the study participants and suggests the possibility of a new stage in APOS Theory that would be the first substantial change in…
Descriptors: Preservice Teachers, Numbers, Arithmetic, Knowledge Level
