There was no secondary school for girls in that expanding area. Therefore in 1962, a secondary school section was added to the existing primary school. In 1966 the primary and secondary sections became separate entities. The two schools, OLM primary and OLM secondary South B were in the same building until 1989 when the secondary school moved to its present site. Both schools were administered by different sisters of mercy until 1999 when lay principals were appointed.