The study was based on a national survey of 751 teenagers and their parents. An independent survey organization conducted household interviews between June and August 1983, holding separate interviews with the mother and teenager in each family. If no mother was living in the household, the father was interviewed. Topics covered in the interviews were the extent of family interaction; issues about which parents had arguments with teenagers or about which they gave advice; and teenagers' attitudes toward school, friends, parents, offending, smoking, drinking, and drugs. Teens were asked if they had ever committed a range of minor and more serious offenses. Survey results suggest that parents are supervising their younger teenagers in many ways and that most teenagers accept the in many ways and that most teenagers accept the supervision. Although parental supervision was not as important in preventing boys' delinquency as expected, it was a major influence in determining girls' delinquency. A list of parenting suggestions is intended to encourage parents and their teenagers to consider the implications of their behavior for each other.