As providers of informal STEM education, including libraries, grapple with the issue of offering inclusive programs and meeting the needs of their specific communities, potential program facilitators seek knowledge and guidance to develop and deliver effective STEM programming for underserved populations. Key questions that might be asked include: Have best practices been identified for effectively engaging underserved audiences? What key strategies, if any, have emerged from previous informal science education efforts that can inform new program development? Over the past 10 to 20 years