In this study we investigated the research designs employed to study the interdisciplinary profession of school librarianship during a time period of notable changes across both the Pre-K-12 and school library domains. To conduct this work, we analyzed all 217 articles published in "School Library Research" (SLR) and "School Libraries Worldwide" (SLW) from 2007 through July 2015. Results point to the high variability in research designs employed and limited inclusion of Pre-K-12 students as participants. The articles also exhibit high incidences of collaboration between scholars but limited involvement of practitioners as researchers. Findings are discussed in relation to research and practice.