Adolescence is a stage that brings about multiple developmental changes for an individual. Parents of adolescent children often find these changes challenging. Parenting programmes have been created however, to help alleviate some of these problems. The review of the literature in this article selects and reviews a few parenting programmes that focus on the adolescent population. The current study then focuses specifically on one in particular; Teen Triple P and its use with 4 families. The participants included were a community sample with identifiable, but non-diagnosable, behavioural problems between the ages of 12-13 years old. Using a triangulation method of results; including a multiple-baseline of behaviour monitoring, parental and youth self-reports, and an observational task, the current study evaluates the effectiveness of Teen Triple P. The results indicate that notable changes were observed and reported in young person and parental behaviour for three of the four families. The other family encountered a crisis prior to the measures being completed at post-intervention which may have influenced their findings. Conclusions regarding this study, limitations, and future focuses for research are also discussed.