A high percentages of families with children, including families from underrepresented minority groups, visit libraries frequently, and there is a public library in nearly every community in the U.S. Libraries have long supported formal education efforts by providing literacy programs and other educational opportunities. This very brief white paper from the National Girls Collaborative Project describes and provides examples of libraries that engaging children and families in STEM learning experiences through cross-sector partnerships. Resources include STAR_Net’s Discover Earth and Discover Tech programs that provide librarians with hands-on activities, outreach and online/in-person training opportunities.