Founded in 1616 by Dr Robert Chaloner from Goldsborough, who was Rector of Amersham and a Canon of Windsor, the school was granted its Charter by King James I. The school was for boys only, ‘as well poore as rich’, and was first situated in a private house near the Parish Church, then rebuilt on the same site in 1741. Four girls were first recorded as pupils in 1833. The school moved to the present site in 1901 and, from 1922 onwards, expanded steadily. It registered its own Coat of Arms in 1966. In 1971 it became a Comprehensive.