Under Sister Paschal's leadership, the school continued to maintain high educational standards despite the rapidly increasing student enrolment. Father Ashe recalled, "students began to converge on St. Catherine High School not only from the immediate environs of Spanish Town but additionally from ever-widening radius of hinterlands" Part of this new growth was the inclusion of a boys' school in 1972. This was sited south of the girls high school at what is now the Junior Campus and was started with the transfer of boys from the St. Catherine All-Age department. Permission was obtained from Archbishop John J. McEleney, S.J. and Sister Paschal's Superior to convert St. Catherine High School into a co-educational school.