Ten years ago, Eugene Lang startled a graduating class of East Harlem sixth-graders by promising to pay for their college educations. He had been advised by their principal that most of the students would drop out before completing high school; Lang hoped the tuition promise would motivate them to stay in school. But Lang soon discovered he needed to provide more than money to make the distant prospect of college a reality for his students, whom he called Dreamers. To augment his promise, Lang rented a meeting space and hired Johnny Rivera, a young caseworker with a neighborhood social service organization, to coordinate support services for the Dreamers and their families. Over the next ten years, Lang and Rivera worked closely with the ...