Launched in June 2016, the Smithsonian Learning Lab (SLL) provides access to the digital resources from across the Smithsonian's 19 museums, 9 major research centers, and the National Zoo, to be used as real-world learning experiences. It is designed to aid students in building lasting knowledge and critical skills that take learners from simply finding resources to thoughtful selection, examination, organization, and creation of new resources. The SLL, as it currently exists, was largely informed by the input and practice of diverse and effective educators. Therefore the goal of this Environmental Scan, as a piece of a larger research effort, "Understanding the Needs of Student Users of Digital Smithsonian Resources," focuses on the features of existing social media platforms and tools commonly used by students. The design for this review and summary report is intended to lend additional insight into how digital systems, tools, pedagogy and content, can be adapted to better meet students' learning needs. The overall project will assimilate the findings of this Environmental Scan along with other research to address some key questions around methods or requirements for enhancing student motivation and engagement with digital content and tools: (1) What are the ways that students engage with digital content in academic settings? (2) What are the motivations for student use of digital content? and (3) What are the interface requirements/scaffolds needed to enable and enhance student engagement with rich digital resources? [This project was supported through a grant from the Smithsonian Youth Access grant program. For Volumes 1 and 2, see ED612909 and ED612911. For Volumes 4 and 5, see ED612913 and ED612914. For Volumes 6 and 7, see ED612918 and ED612920.]