Mr Lee Ah Kow was engaged to run the classes which lasted for three years.

In March 1920, Father Edouard Becheras, the parish priest restarted the school with a class of 30 pupils under the charge of Mr. Monterio.

In 1936, Mgr Adrien Devals, the Bishop of Singapore and Malaya invited the brother of St Gabriel to run the Parish School.

Immediately after the war, Brother Louis Gonzaga returned from Bahau, Johor to reopen the school.

By the 1960s, Montfort School was recognized by some for its quality education provided by the Brothers of St Gabriel in the Upper Serangoon District.

Montfort celebrated its 90th anniversary in 2006 with a 90 km run to its former location and a thanksgiving mass conducted by the Archbishop of Singapore, Nicholas Chia, a former pupil of the school.

In 2017, Montfort had a centennial mass in Church of the Nativity of the Blessed Virgin Mary as a part of its celebrations for its 100th anniversary.

The crest is adorned with green olive branches, derived from Ancient Greece, to symbolize peace and prosperity.

It carries the Latin motto "Labor Omnia Vincit" ("Labour conquers all things").

Graduating students may opt to move on to Catholic Junior College with affiliation favours.

Affiliation favours improves net L1R5 aggregate score by removing 2 points, the junior college has to be selected as 1st or 1st and 2nd choice school.

The Express course is a nationwide four-year programme that leads up to the Singapore-Cambridge GCE Ordinary Level examination.

[8] Students take English Language, Mathematics, Basic Mother Tongue and Computer Applications as compulsory subjects.