The College Completion Network was established to expand the field's understanding of promising strategies that could support more students in attaining degrees at open- and broad-access institutions. Funded by a 6-year grant (2017-2022) from the Institute of Education Sciences, the network brought together research teams focused on postsecondary student success to share ideas, build new knowledge, conduct strong research, and disseminate findings among those in the field. The research teams in the College Completion Network conducted studies to refine and evaluate interventions for increasing the number of students who earn degrees at open- and broad-access institutions with the goal of providing college leaders and policymakers with reliable evidence on promising strategies. This briefing book presents high-level summaries of the approaches and findings of each network project as well as links to additional resources related to the projects. These projects examined interventions for which there was strong interest at open- and broad-access institutions. College leaders, practitioners, and policymakers can use the findings to guide decision making related to the use and refinement of these interventions.