This webinar explores the essential principles of developmental evaluation (DE) and how funders adapt them to in a variety of scenarios and contexts. As DE gains traction, people are implementing them in different ways and taking full advantage of DE’s commitment to flexibility. But how much flexibility it too much? What is fundamental? Speakers from three unique DEs will discuss their experiences, which varied significantly while successfully fulfilling core DE purposes. The session will also share resources for those interested in DE implementation.