Seven sets of twins attend Crossmolina National School in County Mayo.
Four sets of twins, Michelle and Caroline McNamara, Sarah and Clare Flynn, Joseph and Georgina McHale and Gerard and David Duffy are all in Sister Bernadette's class at Crossmolina National School in County Mayo.
Where they must cause problems of identification for teacher.
The school is no stranger to twins, with three more sets in other classes, among them the children of the school principal Mrs Frankie Leonard.
An RTÉ News report broadcast on 2 March 1981. The reporter is Conor Fennell.