Parents of adolescents from Auckland, New Zealand, attended a seminar series on raising teenagers and completed pre- and post-intervention assessments of parenting and family relationships in order to examine the effects of participation on family functioning and positive youth development (PYD). Adolescents completed measures of family relationships and PYD. In addition, some parents and their teenagers participated in post-intervention focus groups. The results suggest that brief parenting interventions may produce favourable outcomes for families with adolescent children, including the promotion of important aspects of PYD.