The most important consideration in evaluating chemistry outreach efforts is how to best use the evaluation to serve project needs. Evaluation should be about making programs more effective—at communicating ideas, changing attitudes, inspiring action, or reaching wider audiences, for example. A well-conducted evaluation typically contributes to the quality of a project by helping its leaders better define their goals, identify important milestones and indicators of success, and use evidence to support ongoing improvements. At its best, evaluation is an integral part of project design and