Child health and well-being are intrinsically important and also contribute to a healthy, productive adolescence and adulthood. Parents can play an important role in helping their children acquire or strengthen the behaviors, skills, attitudes, and motivation that promote physical and mental health and overall well-being in childhood, adolescence and well into their adulthood. Acknowledging this, a variety of programs and interventions seek to engage parents in efforts to achieve one or more outcomes for their children: academic achievement and attendance; a reduction in internalizing behaviours such as depression and anxiety, a reduction in externalizing behaviours or acting out such as aggression or delinquent behaviours; an awareness, reduction, or avoidance of substance abuse; awareness or avoidance of risky sexual behavior; and achieving/maintaining health and fitness. In this Fact Sheet, Child Trends synthesizes the findings from 67 experimental evaluations of parent involvement interventions for children ages 6-11 years old to identify the components and strategies associated with successful programs and interventions. Programs were identified by searching LINKS (Lifecourse Interventions to Nurture Kids Successfully), Child Trends' database of random assignment, intent-to-treat studies of social interventions. The authors present lessons learned from 67 parent involvement programs that work, don't work, or have mixed results for children aged 6-11. (Contains 3 tables and 4 footnotes.) [This document was supported by the Stewart Trust.]