Educate Together is poised to become the second largest provider of primary education in the state - with the opening of three new schools this week.
The national schools are opening in Firhouse and Portobello in Dublin and in Rochestown in Co. Cork.
Total pupil numbers in Educate Together primary schools will grow by around 1,500 to exceed 16,000 for the first time.
Amy Mulvihill is regional development officer with Educate Together;