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Ng, Oi-Lam; Sinclair, Nathalie – Canadian Journal of Science, Mathematics and Technology Education, 2015
In this article, we report on two lessons aimed at introducing junior high school students to the idea of shearing in a touchscreen dynamic geometry environment. By using shearing, we hoped to shift students' attention away from a formula-driven, computational conception of area toward a more geometric one. We found that the students were able to…
Descriptors: Junior High School Students, Geometry, Geometric Concepts, Educational Technology
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Son, Ji-Won; Sinclair, Nathalie – School Science and Mathematics, 2010
Recognizing and responding to students' thinking is essential in teaching mathematics, especially when students provide incorrect solutions. This study examined, through a teaching scenario task, elementary preservice teachers' interpretations of and responses to a student's work on a task involving reflective symmetry. Findings revealed that a…
Descriptors: Preservice Teachers, Geometric Concepts, Mathematics Instruction, Problem Solving
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Kasten, Sarah E.; Sinclair, Nathalie – International Journal for Technology in Mathematics Education, 2009
Over the past decade, research on the use of technology in the mathematics classroom has focused primarily on issues of student learning and engagement. In this article, we focus on middle grades mathematics teachers' use of The Geometer's Sketchpad, and study both the decisions they make about when to use technology, and their motivations for…
Descriptors: Educational Technology, Mathematics Teachers, Surveys, Task Analysis
Sinclair, Nathalie – International Group for the Psychology of Mathematics Education, 2003
Much has been said on matter of aesthetics and mathematics--perhaps most commonly articulated in relation to properties such as "beauty" and "elegance," which are used to distinguish good from not-so-good mathematical products. Despite its importance in the work of mathematicians, it has been argued that aesthetics cannot be incorporated into…
Descriptors: Epistemology, Aesthetics, Mathematics Instruction, Values