This is a question that haunts most parents of teenagers.
Parents are often the last to know about their children's involvement with alcohol or drugs.
I was, even though I knew all the signs and symptoms and had been teaching about them as the director of a treatment program for adolescent drug and alcohol dependency. On the other hand, I also knew that adolescent drug and alcohol abuse can happen to any teenager, no matter how much drug education he has had, no matter what his socio-economic level, how much he goes to church, and whether or not his parents are married or divorced. This assessment saved his life. Adolescent drug and alcohol abusers often do whatever they can to conceal their use. The smarter their parents, the harder they try to cover up what they are doing.