Capabilities and biases of learning technologies are examined in light of four widely accepted principles: deep content knowledge, dialogue, agency, and collaboration. Software that supports these principles must focus students' attention on ideas rather than topics or tasks and should foster high levels of "epistemic agency," providing students…

This study examined the structure of two preservice teachers' understandings of educational software in mathematics using repertory grid techniques. Specifically, the study focused on how teacher educators can enable preservice teachers to discern the features of mathematics software, and develop pedagogical goals that reflect the affordances and…