"Failing schools. Underprivileged schools. Just plain bad schools." That's how Eve L. Ewing opens Ghosts in the Schoolyard: describing Chicago Public Schools from the outside. The way politicians and pundits and parents of kids who attend other schools talk about them, with a mix of pity and contempt. But Ewing knows Chicago Public Schools from the inside: as a student, then a teacher, and now a scholar who studies them...