This publication seeks to increase understanding of the need for, and the process of, conducting outcome evaluations of parenting programs in low- and middle-income countries. The result of a collaboration between the University of Cape Town, WHO, UNICEF, and the WHO-led Violence Prevention Alliance, the guidance is aimed at policy-makers; program planners and developers; high-level practitioners in government ministries; representatives of nongovernmental and community-based organizations; and donors working in the area of violence prevention. The publication focuses on parenting programs to prevent child maltreatment and other forms of violence later in life such as youth and intimate partner violence. Parenting programs usually take the shape of either individual or group-based parenting support. An example of individual parenting support is home visits, which involve trained home visitors visiting parents. Group-based parenting support, on the other hand, is typically provided by trained staff to groups of parents together. This document was designed to help strengthen the evidence for various types of parenting programs.