Gaelscoileanna Teo. was founded in 1973 as a national, voluntary organisation supporting the development of Irish-medium schools at primary and at post-primary level. As of July 2014, Gaelscoileanna Teo. is the lead organisation in the Irish-medium Immersion Education and Preschool sector. The organisation’s new role also includes the provision of support services for Irish-medium schools in Gaeltacht areas. Gaelscoileanna Teo. provides advice, assistance and support to people who wish to have their children educated through the medium of Irish, as well as support services for those working in the sector.