Mandy Pierlejewski is a senior lecturer in early childhood education and course leader of the BA Primary Education 3-7 QTS degree at Leeds Beckett University. Before entering higher education, Mandy was a primary school teacher and early years leader as well as an advanced skills teacher specialising in early years. Prior to joining Leeds Beckett University in 2016, Mandy’s particular research interest was the datafication of early years education. Her work examines the impact of datafication on teacher and child subjectivity, with a particular focus on Roma children. It also examines resistance to datafication through the use of child-led pedagogy such as ‘in the moment planning’.