The attainment gap is one of the most insidious social injustices in the developed world, responsible for concreting the growing inequality of our societies. Schools everywhere are obliged to tackle it, if not officially by their national or local government, then morally. It is now seven years since the UK government expressed this obligation in policy form in the pupil premium grant, but despite this, and the reams of academic research conducted all around the world on the attainment gap, there is still a limited amount of practical guidance out there for school leaders on how to actually respond.