The Nature Club of St. Xavier's Collegiate School has always been committed to sensitizing its students on issues relating to environmental degradation.Thus it encourages its members to be pro-active towards sustainable development in their given milieuh.The Nature Club of St. Xavier's Collegiate School embodies passion for and devotion to Mother Nature and Her creations.

The Xaverian Quiz Club has been an active, intellectual arm of the institution since the inception of quiz competitions in the 1960’s. The Quiz Club of this school has always been a vibrant, dynamic, prize-achieving body, no matter how many AVTAARS it had to go through. At present, the club is being monitored by Mr. Andrew Singh, Ms. Sriporna Chakraborty and Mr. Brett Fernandes.

After a gap of 13 years, St. Xavier's Collegiate School Debate Club organized an inter-school debate competition 'CICERO' for class 11 - 12 at St. Xavier's Collegiate School on 2012. Twelve schools including St. Xavier's Collegiate School participated.Shourya Dasgupta a student of St. Xavier's Collegiate School won the best speaker award at the L.N. Birla Memorial Debate.

The Inter-Schools Elocution and Extempore Speech contest was held at Loyola School was held at Loyola School, Jamshedpur on the 1st of September, 2012. Altogether, ten Jesuit Schools participated in the event and the Joint winners were St. Xavier's Collegiate School, Kolkata and Loyola School, Jamshedpur. St. Xavier's Collegiate School has won the prestigious Kutan Shield for three consecutive years.

St. Xavier's Collegiate School's, Christian Life Community (C.L.C.), has left its footprints in the sands of time. The C.L.C. got a fresh start under the close supervision of Fr. Sebastian James, SJ With the motto of "LOVE, SACRIFICE AND FAITH", the community has been growing layer by layer, phase by phase and ideal by ideal. It got an official structure with Andrew Watson, of class 12, as its first President.

Leadership training service (LTS) is a youth movement mainly for students in schools and colleges. It has a vibrant history of four and a half decades during which it has become a part of life for many young people in Bangladesh, India and Nepal. The vision of an organization to help students to develop their personality, promote their leadership qualities and inculcate in themselves social awareness.

It was with this very same desire of making education go beyond the textbooks and the rigid confines of the classroom that Father Bruylants, the then Headmaster of St. Xavier's Collegiate School, Kolkata, had started the student exchange programme between SXCS, Kolkata and Belvedere College, Dublin in 1996. Dublin Exchange Programme has been successful in bringing about a positive change.

School Assemblies are a part of our daily curriculum. We have our Assemblies on Day 1 and Day 4. Each Assembly is scheduled for 8 to 10 minutes. We started our Theme oriented Assemblies, based on different levels or groups, from the 21st of June 2011. These Assemblies have not only brought out a lot of talent but also helped the students gain a great deal of self-confidence.

St. Xavier's Collegiate School (Loyola Scout Group) is open to boys of all classes. The Group consists of a Cub Pack and Scout Troop registered with The Bharat Scouts and Guides. After a long gap the SXCS Scout Troop has been re-started with the blessing of the Headmaster and Prefects of the school. The cubs - Ishan Dutta, Sarbajit Choudhuri and Trijeet Gomes represented our fledgling SXCS Cub Pack.

Sansriti - Bengali Cultural Club: St. Xavier’s Collegiate School, Kolkata, celebrating its 150th year of glorious existence, and a living proof of withstanding the test of time had decided to pay homage to Bengal, which has nurtured it and helped it attain its present grandeur. Sansriti, the Bengali Cultural Club of St. Xavier's Collegiate School had organised an inter-School Bengali Cultural festival on 24th & 25th June,10.

Being a part of the Social Service Club has made me feel what 'community service' truly means. As a junior I always wanted to go to all classes and announce the week's Social Service collection and encourage my fellow students to donate generously. At St. Xavier's, Social Service is taken very seriously. We have a committee of 15 boys from classes 7 to 12.