At Key Stage 3 short, medium and long-term assessment contributes to an awareness of how well learning is embedded and which gaps remain to be addressed. Short-term day to day assessment is based on the Mastery Flow Model, whereby students need to be able to answer probing questions to demonstrate that learning has been secured on a present topic/skill. Over a topic students who are consistently able to answer probing questions on content will be working at age related expectations. Those able to consistently answer further extension/rich questions will be working beyond age related expectations. Long-term assessment on an annual basis involves standardised assessment on an AET Trustwide exam paper called ‘Stop the Clock’ which benchmarks each students’ progress relative to students with similar starting points.