Some education programs' early positive effects disappear over time. Other programs have unanticipated positive long-term effects. Foundations warn of the dangers of putting too much weight on in-program effects, which, they say, often fade after a program ends. This Issue Focus tackles the topic of post-program effects in postsecondary education.…

LifeSkills Training is the only program to prevent substance use disorder among adolescents that has evidence of effects on substance use outcomes from multiple randomized controlled trials. Evaluations have shown that the version for middle school students reduces their use of substances in high school, but these studies were conducted in the…