This article discusses the significance of adult connections for adolescents' sense of school belonging and identifies areas for future research and practice by (a) exploring the influence of adult connections on adolescents' sense of school belonging; (b) reviewing the literature regarding school belonging outcomes; (c) identifying potential barriers to building adult connections and school belonging; (d) presenting school improvement initiatives that hold promise for facilitating adult connections and school belonging; and (e) introducing a research and practice agenda that underscores the need for further investigation into the relationship between adult connections and school belonging. This proposed agenda represents an important addition to the literature by advocating for an increased focus on the process and significance of these relationships during adolescence, emphasizing adult connections and school belonging in school improvement initiatives, and indicating how adult connections can promote positive outcomes for at-risk students. (Contains 1 figure.)