Mathematics teaching and learning are inherently complex practices, and reports suggest that American teachers are not as successful at teaching mathematics as the authors might hope. In this article, the authors explore how a seemingly ubiquitous new technology--the personal audio/video player--just might help teachers improve mathematics…

This case study of one middle school focuses on improving teachers' skills in data-driven decision making through analysis of student work and their own professional practice. The expectation that schools will make adequate yearly progress has pushed evaluation practice down to the teacher level, where teachers are asked to analyze and…