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Direct linkBingolbali, Erhan; Demir, Gokhan; Monaghan, John D. – International Journal of Science and Mathematics Education, 2021
This paper examines a didactic phenomenon, a perception that the elements of sets have a common property, e.g. that {1, 2, 3} and {a, b, c} are sets but {1, 2, 3, a, b, c} is not a set. The paper reports manifestations of this phenomenon in one country: across a range of school students in textbooks and in curricula and across pre-service and…
Descriptors: Mathematical Concepts, Mathematics Education, Textbooks, Curriculum
