- Philatelic & Numismatic Society
- Robotics Club
- Yoga Club
- Library Club
- Environmental Club
- College Magazine
- Chamber Orchestra
- Cinema Society
- Astronomy Club
- Aquarium Club
- Scuba Diving Unit
- Culinary Arts Society
- Aeronautical Societya
- Junior Science & Technology
- Histoarcheo Club
- Geography Society
- Gavel Club
- Student Christian Movement
- English Lit & Debating Society
- Radio Club
- Junior Maths Society
- Road Safety Patrol
- Sinhala Literary & Debating Society
- Seylan Bank Students’ Savings Unit
- HNB Students’ Savings Unit
- Kennel Club
- Buddhist Students’ Association
- Junior English Lit & Debating Society
- Art Club
- Spelling Union
- Carnatic Orchestra
- Canto Perpetua Choir
- Western Band
- Tamil Drama Society
- Hewisi Band
- English Drama Society
- Photographic Club
- Society for Social Work & Welfare
- ICT Society
- Senior Environmental Club
- Hindu Students’ Union
- Political Science Society
- Red Cross Society
- Association of Innovation and Design
- Islamic Society
- Association of Science and Technology
- Quiz Club
- Automobile Club
- Cubing Society
- Health Club
- Tamil Literary and Debating Society
- Wildlife Society
- Thomian Union
- Commerce Society
- Interact Club
- The Ternion
- Classical Music Association
- Media Unit
- Productive Citizenship Society
- United Nations Club
The Ternion
The Ternion is a body dedicated to reporting current affairs of College in terms of sports, academics as well as special achievements. Further it acts as the ‘Voice of the Students’ and provides opportunities for the students and staff of the school to contribute by means of writing, art and journalism. Our primary objective is to publish high quality monthly publications of which will showcase the skills, the unbiased opinions and the original work from the student-teacher community of S.Thomas' College Mount Lavinia.
Latest Project
5th Issue of 2021
The 5th Issue of the Ternion emphasized on a few important projects initiated by a number of clubs at college that took place over the course of July 2021. Further, issue also contained a brief introduction about the new head prefect and deputy head prefect.