Developmental evaluation is a work-in-progress; an evolving methodology. This guide builds on the contribution of an earlier booklet by Jamie Gamble entitled A Developmental Evaluation Primer, published by the Foundation in 2008. It contains the lessons and insights of a group of practitioners who collaborated on a program called YouthScape, which aimed to support the engagement of young people in their communities—a program that by its nature was clearer on its goals than on the means to attain them, and which involved all the stakeholders in an intense learning process.