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. Informing the recommendations in this document are findings from the five components of this project: (1) A Literature review of research, studies, and reports on the topic of digital learning trends and strategies for youth (Volume 1, ED612909); (2) Environmental scans of both digital learning environments and social media platforms used by youth (Volume 2, ED612911 and Volume 3, ED612912); (3) Analysis of existing usage data for Smithsonian Learning Lab users ages 13-17 (Volume 4, ED612913); and (4) Classroom testing and observations with youth across diverse school environments (Volume 5, ED612914 and Volume 6, ED612918). This document represents a compilation of findings from each of the above elements. These findings helped the project team to distill a series of features and strategies to test with students and determine potential areas for further development to the Smithsonian Learning Lab to support the needs of student users. [This project was supported through a grant from the Smithsonian Youth Access grant program.]