This resource guide was finalized during the 2005 Prevention Days, organized by the National Institute for Prevention and Health Education (INPES). It was initiated as part of INPES’s ongoing reflection on evaluation within its field of expertise. It brings together definitions and methodological articles that provide a better understanding of the role of evaluation and offers methodological and practical guidance for implementing evaluation in the field of health promotion and education. This resource guide is organized into five chapters: What is evaluation? Why do we evaluate? How do we evaluate? Evaluating an initiative: application examples; Further reading. Each section begins with an explanation of the rationale behind the selection of the 31 articles included.