In 1900, the foundation stone was laid for a new Generalate, called St Mary's, and this is still the main building on the college campus today.

In 1926, the Congregation became involved in the Irish National School system, and consequentially the college's focus on primary education increased.

The B.Ed qualification gained from Marino Institute of Education was validated by Trinity College Dublin.

[3] 2012 saw Trinity College Dublin join the Christian Brothers in Co-Trusteeship of Marino Institute of Education.

[citation needed] Marino Institute of Education provides a Study Abroad Programme with Iona College New York.