It’s fair to say Barry O’Callaghan knows a thing or two about education. The Irish financier, himself educated in the likes of Jesuit private boarding school Clongowes and Trinity College Dublin, was chief executive of Riverdeep as it transformed into the largest educational materials publisher in the kindergarten to 12th grade (K12) sector in the US. The Cork native is also a backer of one of Ireland’s most expensive schools, Nord Anglia International School Dublin, through his investment vehicle AKLO Capital. Nord Anglia, where annual fees rise to as high as €25,523 in Grade 12, runs an international baccalaureate (IB)…