Using "threshold concepts" (Meyer and Land) as a lens, this article examines several issues related to learning within and across two general education courses—one in writing and one in history—in which students were concurrently enrolled. Analysis of data from students and instructors (of the history course) suggests threshold concepts that are shared among history and writing courses; however, the data also indicate that the extent to which these shared concepts are enacted through instruction is somewhat inconsistent. The article ultimately suggests that threshold concepts might prove a productive frame through which to consider questions related to writing and transfer, and also to general education more broadly.