This article considers a recent policy initiative in assessment in English primary schools (ages 5-11 years) in which curriculum 'levels' used by teachers to judge pupils' attainment were suddenly removed. Previous work has largely focused on assessment of pupils, but we examine assessment as an activity through which teachers reproduce their professional standing. Using data from a small-scale study we investigate how teachers responded to these changes and what this tells us about the way in which the economy, and politics, of assessment practices operate at school level. Using Foucault as a theoretical framework, we make visible how this system was reorganised by teachers through the construction of new regimes of truth. Implications include evidence of a potentially damaging changing relationship between teachers and pupils, the key role of technology and the deleterious effect of neoliberalism on teachers' and pupils' relationships with both the process and subject matter of learning.