The study included 598 adults who were surveyed at the ages of 24 and 27; almost 400 had taken part in the Seattle Social Development Project during elementary school, while the rest had not. The program trained teachers in classroom management, offered parents classes in encouraging positive behavior and helping their children with schoolwork, and gave children lessons in getting along with their peers and controlling their own behavior. The goal was help children excel at school and cut their risk of drug use, early pregnancy and getting involved in crime. Researchers found that students who had gone through the program were, in general, doing better than their peers at the age of 27.