Sandymount High School was founded in 1947 and was initially controversial because, as a non-denominational school, it wasn't owned by a church but by the Cannon family, who also provided the two headmasters the school had: father and son Patrick and Conall Cannon. Patrick's wife Eileen Cannon also served as headmistress.
The school's student body included those from a local council estate called Beech Hill, the offspring of parents disenchanted with denominational/same sex schools, students on the Malahide/Howth to Bray rail corridor and foreign nationals who paid tuition fees.
While the school had a gym — basically exercise classes — for Intermediate Certificate students, it had no compulsory sports or sports team for a period. Otherwise rugby union was the main school sport for both Intermediate and Leaving Certificate male students during the early 1960s.
A rival school opened next door several years later: Marian College, run by the Catholic Church. It was opened at the behest of John Charles McQuaid to counter what he perceived as the influence of Sandymount High.
- Murray, Peter (2010). "Educational Developmentalists Divided? Patrick Cannon, Patrick Hillery and the Economics of Education in the Early 1960s" (PDF). The Economic and Social Review. 41: 6.
- John Charles McQuaid: ruler of Catholic Ireland, John Cooney, p.295
- Parliamentary Debates, 26 April 2006 - the school is listed as one that closed since 1996
- Fionnula Flanagan, the Lisa Richards Agency
- Press Release Archive, University College Dublin, retrieved 21 July 2009
- McCarthy, Mary (7 May 2020). "This Working Life: 'I was too shouty on The Dunphy Show but my podcast absorbs me now'". Irish Independent. Retrieved 21 January 2021.