It is usually the first year of compulsory education and incorporates students aged between five and seven.
Although there are slight variations between the states, most children in Year 1 are aged between six and seven.
It is also the first year of Key Stage 1 in which the first sections of the National Curriculum are introduced.
In Wales, Year 1 is part of the Foundation phase.
[5] In Northern Ireland and Scotland, the first year of compulsory education is called primary 1, and pupils generally start at four or five years old.