In England and Wales , primary school begins with an optional "nursery" year followed by reception and then move on to "year one, year two" and so on until "year six". In state schools, children join secondary school when they are 11–12 years old in what used to be called "first form" and is now known as "year 7". They go up to year 11 (formerly "fifth form") and then join the sixth form, either at the same school or at a separate sixth form college . A pupil entering a private, fee-paying school (usually at age 13) would join the "third form" — equivalent to year 9. Many schools have an alternate name for first years, some with a derogatory basis, but in others acting merely as a description — for example "shells" (non-derogatory) or "grubs" (derogatory).