- Aeronautical Society
- Art Club
- Association of Innovation and Design
- Association of Science and Technology
- Automobile Club
- Buddhist Students’ Association
- Canto Perpetua Choir
- Carnatic Orchestra
- Classical Music Association
- Commerce Society
- Cubing Society
- Culinary Arts Society
- English Drama Society
- English Lit & Debating Society
- Gavel Club
- Geography Society
- Health Club
- Hewisi Band
- Hindu Students’ Union
- Histoarcheo Club
- HNB Students’ Savings Unit
- ICT Society
- Interact Club
- Islamic Society
- Junior English Lit & Debating Society
- Junior Maths Society
- Junior Science & Technology
- Kennel Club
- Media Unit
- Photographic Club
- Political Science Society
- Productive Citizenship Society
- Quiz Club
- Scuba Diving Unit
- Radio Club
- Red Cross Society
- Road Safety Patrol
- Senior Environmental Club
- Seylan Bank Students’ Savings Unit
- Sinhala Literary & Debating Society
- Society for Social Work & Welfare
- Spelling Union
- Student Christian Movement
- Tamil Drama Society
- Tamil Literary and Debating Society
- The Ternion
- Thomian Union
- United Nations Club
- Western Band
- Wildlife Society
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.