William Lyon Mackenzie Collegiate Institute is a semestered high school located in Toronto, Canada.

[3] A contest for the school's name was held and William Lyon Mackenzie, the first mayor of Toronto and leader of the Upper Canada Rebellion in 1837, was selected.

Through this organization, Mackenzie has gained national media attention due to events featuring David Suzuki, Steven Page of the Barenaked Ladies, MuchMusic and members of Sum 41.

[7] The MaCS Program began in 1985; it offers enriched English, Mathematics, Science and Technology courses for advanced students.

[8] Students applying for the MaCS Program must undertake an entrance exam and complete a comprehensive application package.

[citation needed] The Advanced Placement Program has been active at the school since 2002 with the AP Computer Science course (ICS 4U0).

[11] Students who completed all the required courses are eligible for the FIT Plus Certificate if they do a Cooperative component or summer internship in a field related to Engineering, Programming or Media Communication & Arts.