Educational research in metacognition is based predominantly on a positivist paradigm and empirical epistemological assumptions about human cognition and its investigation. Following recent calls for greater methodological diversity, this paper critically examines the possibility of studying metacognition in education through Karen Barad's (2003, 2007, 2010, 2014) ethico-onto-epistemological framework. In coining the term metacognition(ing), five new propositioning are theorised: (1) metacognition(ing) involves a practice of dynamic material configuration of entanglements in which human cognition takes part; (2) meta is inseparable from everything that occurs, relates and emerges in existence; (3) the self is dispersed in becoming, threaded through its relational performances; (4) the apparatus is not separated from the objects and subjects of investigation, and (5) diffraction could potentially open new ways to investigate metacognition(ing) in complex natural phenomena. The paper concludes with questioning the potential of studying metacognition(ing) in educational research.