He taught at and was principal of Lough Cultra National School, Co Galway until 1871 until he moved to teach at St Colmans College in Co Down, where he worked as a professor of English and Mathematics for 3 years.

[2] In 1877, Cusack began to offer tutoring to students preparing for civil service exams, eventually establishing his own academy and running it from his own house in Gardiner Place, Co Dublin.

[9] Cusack was fond of sports and was involved in many, including an ice hockey club that he set up in his own academy, as well as handball, rowing and cricket.

Cusack arranged a meeting in Hayes's hotel, Thurles, Co Tipperary on November 1st 1884, and the Gaelic Athletic Association (GAA) was founded.

[4] Cusack died on Morning Star Avenue, Dublin at 5 pm on Wednesday 28 November 1906 from a final heart attack at the age of 59.

[14] The bigoted character of "The Citizen" in James Joyce's novel Ulysses is thought to have been at least in part based on what has been described as "a jaundiced portrait of Michael Cusack".

[18] Michael Cusacks's Sydney GAA Club was founded in 1988 by a group of Clare men and was named in honour of the man from Carran.

[20] A small collection of family papers was donated to the James Hardiman Library, NUI Galway, by his grandniece, Patricia O'Connell.