Early childhood researchers from across the U.S. came together to form the Early Learning Network (ELN) in 2016 with the mission to identify policies and practices that narrow opportunity gaps and help children maintain early learning success. Early Learning Network teams are excited to share what they have learned--and what it means for early childhood education practice and policy--in a series of research briefs. The briefs summarize impact areas that have potential to positively contribute to young children's learning and development, including key takeaways and action steps for practice, policy and research. They were developed using the teams' collective findings, along with critical input and insights shared by U.S. stakeholders during the Early Learning Network Forum. Four impact areas emerged, each with their own key takeaway: (1) Pre-K Participation; (2) Classroom Experiences and Learning Opportunities; (3) Relationships; and (4) Sustained High-Quality Experiences. Information regarding Optimizing Learning Opportunities for Students (OLOS), a classroom assessment tool developed by the ELN assessment team and field-tested by network members, is included.