Abstract
In this study, based on task-based interviews, prospective mathematics teachers were asked, using Cabri 3D, to find the minimal distance from one point to another on a cube and on rectangular prisms and then the epistemic modes used as they solved these optimization problems were analyzed. The results indicate that these prospective teachers had difficulty reasoning about the location of the optimal points. They made sense of the optimal distances and produced conjectures after dragging objects and making measurements. As they became more comfortable comparing and contrasting the lengths of different paths, they became more purposeful in using the tools in Cabri 3D (e.g. the Length tool) to identify optimal distances. Once the participants had represented the problem situation in two dimensions, they used Cabri 3D sparingly and produced a generalized conjecture.
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Hollebrands, K., Okumus, S. Prospective Mathematics Teachers’ Processes for Solving Optimization Problems Using Cabri 3D. Digit Exp Math Educ 3, 206–232 (2017). https://doi.org/10.1007/s40751-017-0033-0
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DOI: https://doi.org/10.1007/s40751-017-0033-0