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Direct linkWidder, Mirela; Berman, Avi; Koichu, Boris – Journal for Research in Mathematics Education, 2019
Aiming to enhance understanding of visual obstacles inherent in two-dimensional (2-D) sketches used in high school spatial geometry instruction, we propose a measure of visual difficulty based on two attributes of the sketches: potentially misleading geometrical information (PMI) and potentially helpful geometrical information (PHI). The…
Descriptors: High School Students, Spatial Ability, Visual Perception, Geometry
Peer reviewedJacobson, Cathy; Lehrer, Richard – Journal for Research in Mathematics Education, 2000
Presents a study in which children in four grade 2 classrooms learned about transformational geometry and symmetry by designing quilts, while their four teachers participated in professional development focused on understanding children's thinking in arithmetic, and two of the teachers participated in additional workshops on students' thinking…
Descriptors: Design Crafts, Discourse Modes, Educational Change, Geometry
