This paper examines processes of datafication in early childhood education (ECE) settings for children from birth-five years in England and how this relates to increased formalisation. Unusually, ECE in England includes a standardised curriculum and formative and statutory assessments; thus it has been described as subject to both datafication and 'schoolification', a term used to describe the adoption of school-like practices and values in ECE. Using interview data from ECE settings over the last decade and a theoretical framework drawing on Foucault and Deleuze, the paper sets out the ways in which settings in schools and nurseries are subject to the demands of data, and how this produces data-driven subjectivities for both teacher and child. These developments are then linked to aspects of 'schoolification' including more formal teaching, a focus on literacy and mathematics, and use of 'ability' grouping.