Serving the Tam O'Shanter – Sullivan community, the school offers business, math and technology courses.

Built in 1969 on a 20-acre property on Birchmount Road north of Sheppard Avenue, John Buchan opened on September 2, 1969 and Stephen Leacock Collegiate opened on September 8, 1970 as the borough's fifteenth collegiate institute.

The schools were named after John Buchan, the fifteenth Governor General of Canada and Stephen Leacock, an English Canadian teacher, political scientist, writer, and humourist.

ft. building with three floors, the two schools contain over 40 classrooms/science labs, two floor library, cafeteria, specialized television and radio studios, four gym spaces, 1000 seat auditorium with DMX lighting consoles and a three-bay automotive shop.

The 23 m, six lane pool is shared by both schools and is overseen by the board's realtor subsidiary, Toronto Lands Corporation.