Some characteristics of learning to notice students' mathematical understanding of the classification of quadrilaterals

International audienceThe goal of this study is to examine how prospective secondary school mathematics teachers learn to notice students' mathematical thinking about the process of classification of quadrilaterals. Findings point out that when prospective teachers identified the inclusive classification of quadrilaterals as a " key developmental understanding " (Simon, 2006), they modified what they considered evidence of secondary school students' understanding of quadrilaterals classification process