High Quality Content by WIKIPEDIA articles! Year One is an educational year group in schools in many countries including England, Wales, Australia and New Zealand. It is usually the first year of compulsory education and incorporates students aged between five and seven. In schools in England Year One is the first year after Reception. It is currently the first full year of compulsory education, with children being admitted who are aged 5 by the 1st September in any given academic year. It is also the first year of Key Stage 1 in which the first sections of the National Curriculum are introduced. Year One is usually the second year in infant or primary school. In schools in Wales Year One is the first year after Reception. It is currently the first full year of compulsory education, with children being admitted who are aged 5 on the 1st September in any given academic year. It is currently part of Key Stage 1, although from 2010 will form the third of four years in the Foundationphase.