Evaluation and measurement are essential tools to respond to the growing demand for accountability and “proof of concept” in the non-profit sector. At the same time, non-profits are embracing the concept of evaluation as a tool that increases program effectiveness. In an effort to make evaluation tools more accessible, the Paloma Foundation and Wellesley Institute partnered to develop a participatory program evaluation guide for non- profit organizations that describes how to undertake a program evaluation using a participatory process.