"This is the piece that's been missing." This reaction is common among educators engaged in AIW Iowa, an initiative that engages teachers and administrators in professional learning communities that are improving student achievement, increasing student engagement, and building a schoolwide professional culture focused on improving…

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…