This paper explores an emerging methodological approach called doppelganger as method. This method uses the idea of a doppelganger or double to explore the social world. It is specifically used to examine datafication, or the increase in the production and use of data and its impact on education. Doppelganger as method begins by locating doubles, finding that doubles of the child and teacher are created through the focus on data production in early childhood education. It then asks how this doubling operates as an instrument of power, using understandings of the literary genre of the doppelganger along with its psychoanalytic interpretations to formulate novel interpretations. Doppelganger as method has been used as a tool to reconceptualize datafication, the increase in the volume and use of data in educational contexts. Using interpretations of Freud's work on the uncanny, a psychoanalytic understanding of the doppelganger is established. This is then applied in an educational context to interpret the function of various doppelgangers. Findings from this method include an ambivalent relationship with data, the marginalization of bilingual children and changes to both teacher and child subjectivity.