For at least 9.5 million high school students (60 percent) and almost five million middle school students (30 percent), back to school means returning to places where illegal drugs are used, kept and sold. For six consecutive years, 12- to 17-year olds have reported that drugs are the number one problem they face. Each year substance abuse costs our schools at least $41 billion dollars in truancy, special education and disciplinary programs, disruption, teacher turnover and property damage. As drugs and alcohol have infested our schools and threatened our children and their ability to learn and develop their talents, too many Americans--parents, teachers, school administrators and students themselves--have looked the other way, hoping that a curriculum program or zero-tolerance policy would take care of the problem, or that in any case experimentation with drugs was a relatively benign right of passage.