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  1. ; ; (, Digital Experiences in Mathematics Education)
    null (Ed.)
    Although geometric transformations are functions, few studies have examined students’ reasoning about these two important concepts. The purpose of this study was to examine the various ways students reasoned about functions in the context of preconstructed, dynamic sketches of geometric transformations. We found that, regardless of prior experience, all students were able to reason about important aspects of the notion of function through dragging. Specifically, by using the idea of the semiotic potential of the artifact (the dragging tool), we were able to examine ways in which students with different backgrounds reasoned about functions and how the use of the dragging tool and semiotic mediation contributed to their descriptions of geometric transformations and functions. 
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