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De Bock, Dirk; Neyens, Deborah; Van Dooren, Wim – International Journal of Science and Mathematics Education, 2017
Recent research on the phenomenon of improper proportional reasoning focused on students' understanding of elementary functions and their external representations. So far, the role of basic function properties in students' concept images of functions remained unclear. We add to this research line by investigating how accurate students are in…
Descriptors: High School Students, Grade 10, Secondary School Mathematics, Mathematics Skills