At Dixons, we believe the most important assessment data in our academies comes from formative assessment. Every day, we use specific and repetitive minute-by-minute formative assessment and other leading indicators to help students develop. However, for our Trust and academy leaders, analysing summative data, even though it is lagged, can also help to inform interventions and dynamic resource allocation both in the moment and over time. Neil Miley kicks off a new mini-series on our approach to assessment.