There has been an increase in school mental health research aimed at producing generalizable knowledge to address longstanding science-to-practice gaps to increase children's access to evidence-based mental health services. Successful dissemination and implementation are both important pieces to address science-to-practice gaps, but there is conceptual and semantic imprecision that creates confusion regarding where dissemination ends and implementation begins, as well as an imbalanced focus in research on implementation relative to dissemination. In this paper, we provide an enhanced operational definition of dissemination; offer a conceptual model that outlines elements of effective dissemination that can produce changes in awareness, knowledge, perceptions, and motivation across different stakeholder groups; and delineate guiding principles that can inform dissemination science and practice. The overarching goal of this paper is to stimulate future research that aims to advance dissemination science and practice in school mental health.