This compendium of case studies and case stories has been compiled to demonstrate examples of cooperation between (1) the health and education sectors and (2) the health and social sectors within the WHO European Region. The purpose of the compendium is to serve as a tool to support countries in implementing appropriate intersectoral policies and interventions to improve the health and well-being of children and adolescents and mitigate health inequalities among children. It is intended for use across agencies and sectors, including ministries, government stakeholders and public policy-makers interested in approaches to intersectoral collaboration, to improve the health and well-being of children and adolescents within their respective communities.