Scholars have become increasingly interested in identifying a more effective set of core teaching practices for developing teacher education and professional development programs. Although they have conducted many investigations within this realm over the past two decades, these efforts have focused mainly upon science, language arts, math, and music. The existing body of academic literature contains only a few studies that examine the social studies context, and this deficiency ignores the field of geography. The current study addressed this gap in the literature by exploring the core practices of geographic inquiry. A Delphi method was used to identify the core practices for teaching geographic inquiry. The findings were derived from a three-round Delphi panel survey involving 27 experts in the geography education field, helping to build consensus around a set of core secondary school geography teaching practices. The results revealed that experts considered eight practices to be core for facilitating geographic inquiry: (1) use geographic questions; (2) explain geographic concepts, principles, and processes; (3) select and adapt geographic sources; (4) use geographic/spatial representation and geospatial technology tools; (5) develop geographic reasoning; (6) evaluate sources and employ geographic evidence; (7) construct geographic explanations and predictions; and (8) develop informed-geographic action. These eight core practices for facilitating geographic inquiry do not function separately; rather, they operate simultaneously and in an interconnected manner in which more than one practice works to facilitate inquiry.