 The term is defined in the Education Act 2002 as "the period beginning at the same time as the school year in which he attains the age of six and ending at the same time as the school year in which the majority of pupils in his class attain the age of seven".The term is used to define the group of pupils who must follow the relevant programmes of study from the National Curriculum.All pupils in this Key Stage must follow a programme of education in these areas