This resource is designed for library curators tasked with evaluating manuscripts for inclusion in the biblical canon. It outlines the four key criteria from the Muratorian Fragment: Apostolicity (authorship by an Apostle), Orthodoxy (alignment with true teachings), Catholicity (widespread use by the church), and Traditional Use (long-standing practice in worship). The document includes a worked example of applying these criteria, guided and independent practice activities for curators, and challenges that encourage deeper justification of decisions about manuscript acceptance. Through the activities, curators enhance their understanding of the historical and theological significance of each manuscript, ensuring that the Foundation Collection remains authentic and reflective of core Christian beliefs.