The lack of academic success by American adolescents has been of grave concern for both researchers and practitioners for many decades. While many American adolescents struggle in school, some students are at a greater risk than their peers based on personal characteristics such as race, socioeconomic status, and motivation. The low levels of…

This study offers an analysis of the learning of practicing teachers as they acquire a deeper knowledge of mathematics. While some professional developers have shifted part of their focus to helping practicing teachers acquire a deeper knowledge of mathematics (e.g., Stein & Silver, 1996), the results from studies often describe what translates…