From A. B. Lucas S.S., A.Y. Jackson S.S., Agincourt C.I., Albert Campbell C.I., Bayview S.S., Bell H.S., Bill Hogarth S.S., Bloor C.I., Brooklin H.S., Cairine Wilson S.S., Cameron Heights C.I., Castlebrooke S.S., CCCGSH Informatics, Centennial CVI, Centre Wellington District H.S., Chaminade College School, Chinguacousy S.S., Codeforces, Coding4Community, Colonel By S.S., Corpus Christi College, Crescent School, CS145, CS234, Danforth CTI, digIT Summer School, Don Mills C.I., Dr. Norman Bethune C.I., Dryden H.S., E.L. Crossley S.S., Earl Haig S.S., Earl of March S.S., Eastwood C.I., Erindale S.S., Etobicoke C.I., Father Michael Goetz C.H.S, Fleetwood Park S. S., Forest Hill C.I., Foxen, General Amherst H.S., Georgia Institute of Technology, Glenforest S.S., Guangzhou Foreign Language School, Harbord C.I., Harvard University, Hillfield Strathallan College, IEEE @ Humber College Student Branch, Indian Institute of Technology, Delhi, Indian Institute of Technology, Kanpur, Iroquois Ridge H. S., John F. Ross C.V.I., John Fraser S.S., Langstaff Secondary School, Lawrence Park C.I., Leaside H.S., Lisgar C.I., London Central S.S., Lord Byng Secondary School, Loyola C.S.S., Mahou Shoujou, Malvern C.I., Maple High School, Marc Garneau C.I., Markville S.S., Massachusetts Institute of Technology, McGill University, Middlefield C.I., Milliken Mills H.S., Mississauga S.S., Moira Secondary School, Monarch Park CI, Moroccan Olympiad in Informatics, Neil McNeil H.S., Nepean H.S., Newmarket H.S., North Park S.S., North South Foundation, Northern S.S., Notre Dame C.S.S., Ottawa STEM Club, Parkdale C.I., PEO-Mississauga Chapter, Port Credit Secondary School, Port Moody Secondary School, Presbyterian Ladies College, Sydney, Qing Teng Academy of Alcanta International College, R.H. King Academy, Reynolds S.S., Richmond Green S.S., Richmond Hill H.S., Riverdale C.I., Runnymede C.I., SATEC @ W. A. Porter C.I., Sir Allan Macnab S.S., Sir John A. Macdonald C.I., Sir Oliver Mowat C.I., Sir Winston Churchill High School, SKH Tsoi Kung Po S.S., South City International School, St Hilda's Anglican School for Girls, St. Andrew's College, St. Augustine C.H.S., St. Basil-the-Great C. S., St. Clement's School, St. Edmund Campion C.S.S., St. Francis Xavier S.S., St. George's School, St. Marcellinus C.S.S., St. Mildred's-Lightbourn School, St. Robert C.H.S., St. Theresa of Lisieux C.H.S., St. Thomas Aquinas C.S.S., Stephen Lewis S.S., Thames Valley District School Board, The Woodlands School, Thornhill S.S., Thornlea S.S., Trinity College School, Unionville H.S., University of British Columbia, University of Guelph, University of Ljubljana, University of Ontario Institute of Technology, University of Pinar del Río, University of Toronto, University of Toronto Schools, University of Waterloo, University of Western Ontario, Upper Canada College, Ursula Franklin Academy, Victoria Park C.I., Vincent Massey S.S., Waterloo C.I., WCIPEG Migration, Westdale S.S., Western Canada High School, Westmount C.I., Westview Centennial S.S., White Oaks S.S., William Lyon Mackenzie C.I., Woburn C.I., York Memorial C.I., York Mills C.I.