BigExam based its rankings on several criteria, including but not limited to the school's HKDSE performance and the percentage of students pursuing further education after graduating.

[1] The school also counted a total of 15 winners of the Hong Kong Outstanding Students Awards throughout its history.

In 1921, an organisation called Maryknoll Sisters went from the US to Hong Kong after its founder Mary Joseph Rogers said, "Let's see what God has in store for us."

On 11 February 1925, Mary Paul began teaching 12 students various subjects in the Convent Parlour at 103 Austin Road.

In 1931, due to the growing number of students and teachers, the school moved to 248 Prince Edward Road.

[citation needed] A Norfolk Island Pine tree used to stand at a corner of the school lawn, facing the Waterloo Road Gate of the Primary Section.

At 6 am, the logging staff from the Leisure and Cultural Services Department started to cut down the tree in sections over the course of three hours.

When the former legislator Ms Tanya Chan and a former student asked the staff to show them the permit to cut down the tree, a government official from the Development Bureau, Mr Alan Au, refused.

It was later reported that the school could be prosecuted for breaching requirements of the Antiquities and Monuments Ordinance in carrying out the drainage work that ultimately led to the Norfolk Island Pine tree being cut down.

In addition, Carrie Lam said the school had also felled 18 trees in December 2008 without submitting a removal plan to the Antiquities and Monuments Office.