National Awards
Winners of COSL 2021
| Gold | Nadun Naveendra Rajapaksha | Dharmaraja College, Kandy |
| Silver | Manujaya Praveen Wijesinghe | Royal College, Colombo |
| Silver | Kelambi Arachchige Achira Hansindu | Mahinda College, Galle |
| Bronze | Dinithi Shalika Madhubhashini | Southlands College, Galle |
| Honorable Mention | Makarathan Karunairasan | Thalawakelle Tamil Maha Vidyalaya |
| Honorable Mention | Hewa Bahithage Ruchini Niwarthana | Pushpadana Girls College, Kandy |
International Awards
Bronze Medalists
Manujaya Praveen Wijesinghe of Royal College, Colombo.
Kelambi Arachchige Achira Hansindu of Mahinda College, Galle.
Nadun Naveendra Rajapaksha of Dharmaraja College, Kandy.
Honorable Mention
Dinithi Shalika Madhubhashini of Southlands College, Galle.
Finalists
Finalists COSL 2020
| Ravindu Ishara Senadeera | Mahanama College – Colombo 03 |
| Makarathan Karunairasan | Talawakella TMV |
| Nadun Naveendra Rajapaksha | Dharmaraja College, Kandy |
| Avanika Varatharasa | J/Vembadi Girls’ High School |
| Chanupa Devnith Wijesinghe | Richmond College, Galle |
| Kavina Kanakeshwaran | J/Meesalai Veerasingam Central College,Meesalai Jaffna |
| Kelambi Arachchige Achira Hansindu | Mahinda College Galle |
| Dinithi Shalika Madhubhashini | Southlands College , Galle |
| N.W.J.Chalani Wathsala | G/Southlands College |
| Dewmini Isurandi Karunarathne | Sanghamittha Balika Vidyalaya ,Galle |
| Methma Pramudi Wijesinghe | Sanghamittha Balika Vidyalaya ,Galle |
| Manujaya Praveen Wijesinghe | Royal College, Colombo 07 |
| Hewa Bahithage Ruchini Niwarthana | Pushpadana Girls’ College, Kandy |
| Erandi Hasathya Gunawardane | Southlands College, Galle. |