Do you consider yourself a science communicator or science communication researcher? Does your research group or institution participate in public engagement activities? Have you ever evaluated, studied, or published your education, outreach or engagement efforts? Scientists and communication practitioners engage non-peer audiences through numerous pathways including websites, blogs, public lectures, media interviews, and educational and research collaborations. A considerable amount of time and money is invested in these activities and they play an important role in how different publics come to understand scientific topics, issues, and the research process. However, few opportunities and incentives exist to optimize science communication practices and to evaluate the effectiveness of different engagement approaches. This session, run at both AGU and EGU, encourages critical reflection on science communication best practices and provides an opportunity for the community of science communicators and researchers to share best practices and experiences with evaluation and research in this field.