The series follows Mr Church, played by David Walliams, a chemistry teacher in a secondary school that falls for new French teacher Miss Postern, played by Catherine Tate. However the new teacher is getting attention from many of her peers, most notably Mr Gunn, played by Philip Glenister and Mr Barber - a depressive geography teacher, often the target of student pranks - played by Steve Speirs. The programme follows the comedic relationships of the teachers during the day-to-day running of the school. The head teacher of the school, played by Frances de la Tour, attempts to keep the peace - but that's not easy in this school.

Big School is a BBC comedy starring David Walliams, Catherine Tate, Steve Speirs, Frances de la Tour and Philip Glenister.

The first series began airing on BBC One on 16 August 2013.

The show was written by David Walliams, who had previously produced Little Britain, along with Dawson Bros. and directed by Tony Dow.