Each year, students who seem like they should be going to college — their transcripts look college-ready, they've applied and been accepted and even applied for financial aid — don't show up for class in the fall. In some communities, the attrition rate over the summer can be as  high as 40 percent; nationally, it's estimated to be between 10 and 20 percent. What happens to these recent high school graduates that stops them from going to college, and how can colleges and counselors keep them on track? Benjamin Castleman, an assistant professor at the University of ...