This project will test a two-year professional development programme on formative assessment. This is based around a pack, “Embedding Formative Assessment” (EFA), which includes materials schools need to deliver 18 monthly internal workshops (“Teacher Learning Communities”) involving all teachers from across the school, working together in groups of 8-12. Formative assessment involves teachers using evidence of pupils’ understanding and learning to make decisions, minute-by-minute and day-by-day, about the next steps in teaching and learning. This evidence could also be used when planning lessons or differentiating activities for individual pupils. When assessing formatively, the feedback given by teachers moves learners forward. Students are developed to be owners of their own learning and support each other to progress. The pack was developed by renowned educationalist Dylan Wiliam with SSAT.