This resource explores the outcomes of Parenting for Lifelong Health for Teens, an evidence-based, group parenting programme implemented at scale in Tanzania. Delivered as part of a community-based HIV prevention initiative, the programme aimed to address key factors contributing to adolescent vulnerability, including violence against children (VAC), caregiver-adolescent relationships, and sexual and reproductive health communication.

The study analyzed pre- and post-programme data from over 27,000 caregiver-adolescent pairs, revealing significant reductions in:

• Child maltreatment
• Intimate partner violence
• School-based violence
• Parenting stress
• Financial insecurity
• Depression among both caregivers and adolescents
• Adolescent conduct problems

Additionally, participants reported improvements in sexual health communication and caregiver supervision. However, the study also noted declines in positive parental involvement and support for education, with caregivers and adolescents facing greater adversity experiencing less overall change.

This is the first evaluation of large-scale delivery of a parenting programme in the Global South. The findings underscore the programme's potential to reduce VAC and improve caregiver-adolescent dynamics at scale while highlighting areas for further refinement, particularly around promoting positive parenting and educational support.

Ideal for policymakers, practitioners, and researchers, this resource offers valuable insights into scaling effective parenting interventions in low-resource settings.