The rapid rise of MOOCs (Massive Open Online Courses) signals a shift in the ways in which digital teaching and learning are engaged in and understood. Drawing upon a comprehensive search of nine leading academic databases, this paper examines the initial phase of MOOC scholarship (2009-2013), and offers an analysis of these empirical studies that conceptualizes themes in MOOC scholarship and locates them within a chronological framework. Two key phases of scholarship about MOOCs are identified, each with associated research imperatives and themes. Phase One: Connectivist MOOCs, Engagement and Creativity 2009-2011/2012. Themes of Phase One include: development of Connectivism as a learning theory, and technological experimentation and innovation in early cMOOCs. Phase Two: xMOOCs, Learning Analytics, Assessment, and Critical Discourses about MOOCs 2012-2013. Themes of Phase Two include: the rise of xMOOCs, further development of MOOC pedagogy and platforms, growth of learning analytics and assessment, and the emergence of a critical discourse about MOOCs.