In July 1963, students and staff moved into a new school premises at Swiss Cottage Estate (along Dunearn Road), which officially opened in November 1963, with an enrolment of about 870 pupils in two mediums, namely English and Malay.

[3] In 1966, Minister for Law and National Development Edmund W. Barker described SCSS as one of the foremost integrated schools in Singapore.

The study of Conservation that the programme puts a sharp focus on helps students to navigate the balance between rootedness and openness in an age of globalization and modernity.

SCSS is one of the 28 secondary schools selected by the Ministry of Education to start piloting aspects of Full Subject-Based Banding (SBB) from 2020 onwards.

With Full SBB, the school is moving towards one secondary education, with many subject bands, to better meet students’ learning needs, without labels.

This is part of the broader shift in the education system to recognise the strengths and interests of students, to help them build their confidence and develop an intrinsic motivation to learn for life in them.

SCSS's cut-off point for the Express Stream has consistently been within the 235-240 range, making it one of the top 40 secondary schools in Singapore.