The knowledge overviews look more closely at the key knowledge that is taught in each unit of work and in each individual lesson, particularly the substantive and disciplinary knowledge.  Curriculum leaders map out this knowledge so that the most important knowledge is consistently delivered in every year group. These documents also outline the key vocabulary for each lesson as well as the opportunities to develop the golden thread of ‘communication and language.’  To ensure that prior learning constantly feeds into current learning, the prior knowledge that is pertinent to this unit is identified by leaders.