Within the National Curriculum, teacher assessment is held up as good professional practice - but the only official guidance is that teachers should look to and record their pupils' "significant achievement". Yet what is significant achievement? And is it the same for each child?;This text is one in a series which seeks to explain the idea of significant achievement, and explores the implications for the planning, assessment and record-keeping cycle throughout the primary school. It aims to put significant achievement, and how to foster it, within a subject context, and tells teachers how to start tracking significant achievement in their own classrooms.;It provides examples and advice for defining and recognizing what constitutes achievement for each child, and guidance on how to use such "milestones" formatively, as a basis for teaching. It also highlights what constitutes "progression", in terms which link with but go beyond the National Curriculum - including physical and social skills, attitude development, "concept clicking" and process skills.