This article argues for the importance of broad and on-going research to support initial or pre-service teacher education program admissions. Examples from a large initial teacher education program at one Canadian university illustrate the contributions of research to the evaluation and refinement of admission processes. These examples include anonymous surveys and confidential interviews of current pre-service teachers about their experiences of answering application questions about their social identity, how they decided to apply to and attend the program, and their expectations of teacher education and teaching. Research studies about the perspectives of and agreement among the application raters are also discussed. Finally, how the operational needs of the admission processes shape the research agenda and the emerging research findings in turn shape the admission processes is explored.