SEERNet is a network of Digital Learning Platforms, researchers, and practitioners with the vision to leverage DLPs as research infrastructure, enabling researchers to ask and answer important questions about learning in ways that are grounded in realistic, widespread use of learning technologies. A first wave of work established the foundation for the research community. The network looks now towards a second wave of work that clarifies research opportunities and builds capacity for the types of research that can be supported. A third wave seeks to expand the network's efforts towards broader aspirations for better science, engineering, practitioner engagement, and community.