Abstract
Current technologies incorporating sophisticated mathematical analysis software (calculation, graphing, dynamic geometry, tables, and more) provide easy access to multiple representations of mathematical problems. Realising the affordances of such technology for students’ learning requires carefully designed lessons. This paper reports on design research conducted with nine teachers in nine classes across two schools. The lesson came at the end of their study of quadratic functions (Year 10). Technology offered the ability to link representations and the teaching challenge was to use this ability effectively. Four issues emerged: variable naming; reducing cognitive load; maintaining motivation; and retaining a clear learning focus.
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