This is a compelling, eye-opening portrait of two communities in Philadelphia with drastically different economic resources. Over the course of their 10-year investigation, the authors of this important new work came to understand that this disparity between affluence and poverty has created a knowledge gap - far more important than mere achievement scores - with serious implications for students' economic prosperity and social mobility. At the heart of this knowledge gap is the limited ability of students from poor communities to develop 'information capital'.