Dropouts pay a steep price for leaving high school without their diplomas. In terms of wages, unemployment rates, and career mobility, the grim statistics have been lamented for decades. Society also suffers--more crime and welfare, fewer tax dollars, and lower voter turnout. Not every dropout faces a bleak future. But on balance, the disadvantages are substantial in a country where the lack of a high school diploma closes the door to nearly all skilled and white-collar jobs. The word "dropout" suggests that nongraduating youth have left high school before the end of senior year. Dozens of programs coax them to return to school, and dozens more try to keep the potential dropout from exiting. But what about the students who persisted through the end of their senior year and then did not graduate? The literature on dropouts says very little about these students, yet in many schools they outnumber the seniors who left school before the end of the year. That is certainly the case in John Adams High School (pseudonym for a Delaware school), where 155 seniors from 2004 to 2006 fell short at the last minute, compared with 50 seniors who withdrew before then. What happened to them? In this article, the authors discuss the four main types of nongraduating seniors, highlighting the major ways in which they approached their last year in high school. The authors also describe the various interventions under way at Adams High.