Sixty-seven deaths per week, nine per day, one every two hours: Motor-vehicle crashes are the number one killer of teenagers in the United States, and although fatalities have declined in recent years, almost 3,500 teenagers still die every year in motor vehicle crashes (NHTSA 2011). In fact, 35% of all deaths among 16- to 19-year-olds are…

A substantial proportion of high school students consume alcohol, with nearly a quarter of 12th grade students reporting binge drinking in the past two weeks. Drinking alcohol in adolescence is associated with a variety of other risky behaviors, as well as with an increased likelihood of long-term problems reaching into adulthood. This "Adolescent…