Many students, and the public in general, believe that drinking alcohol is a normal part of the college experience. Unfortunately, students' efforts to "be sociable" or "fit in" can escalate into substance use behavior that puts their health and well-being at risk: One in four full-time college students have experienced past year alcohol abuse or dependence. In 2009, there were approximately 374,000 substance abuse treatment admissions aged 18 to 24. Nearly 12,000 of these admissions were college or other postsecondary school students. College student admissions were more likely than nonstudent admissions to report alcohol (46.6 vs. 30.6 percent) as their primary substance of abuse. College student and nonstudent admissions were equally likely to report marijuana as their primary substance of abuse (30.9 vs. 30.0 percent), and college student admissions were less likely than nonstudent admissions to report heroin (7.2 vs. 16.1 percent), other opiates (8.3 vs. 10.5 percent), cocaine (1.9 vs. 4.2 percent), or methamphetamine (1.0 vs. 4.4 percent) as their primary substance of abuse. (Contains 3 footnotes.)