Agincourt Collegiate Institute  Agincourt Collegiate Institute (known locally as ACI or Agincourt), formerly known as Agincourt High School and Agincourt Continuation School is a secondary school located in Agincourt, a neighbourhood in the Scarborough area of Toronto, Ontario owned and operated by the Toronto District School Board that was sanctioned by the Scarborough Board of Education prior to amalgamation in 1998. A.C.I is one of the oldest surviving secondary high schools in the former Scarborough in the north, the other being R. H. King Academy (formerly known as Scarborough High School/Collegiate Institute) in the south. The school, founded in 1915 as "Agincourt Continuation School" to provide part of the then secondary schooling in the Agincourt area (final years or junior/senior matriculation were done in Markham High School until 1930). Until 1929 it was housed on the second floor in what is now Agincourt Junior Public School building on the west side of Midland Avenue north of Sheppard Avenue. With the opening of Scarborough High School, the first traditional high school in Scarborough, in 1922, the school was evolved into "Agincourt High School" in 1930, with its first permanent home opened on the east side of Midland Avenue in 1929, a three floor brick building. After the Scarborough Board of Education was formed in 1954, the second and current building replaced the second school in 1956. Agincourt High was re-established as "Agincourt Collegiate Institute" in 1957. The current ACI was built by the firm Craig, Madill, Abram and Ingleson. The 1929 building was demolished in 1966 to pave way for the auditorium and second double gymnasium with a smaller single gym. Additional classrooms and shops were added later on. Currently its feeder schools are Sir Alexander Mackenzie Senior Public School, Henry Kelsey Senior Public School, and Sir Ernest MacMillan Senior Public School. In September 2011, Emily Carr Public School with a grade 4 Extended French Programme which started in 2006, became another feeder school for Extended French students. ACI is located in the region of Agincourt, one of the most ethnically diverse communities in Scarborough. , 39% of the student body speaks a primary language other than English at home as often as English, and 18% of its students speak mostly or only a language other than English. Agincourt C.I. commemorated their 50th anniversary in 1965, 75th anniversary in 1990 and their 100th centennial anniversary in 2015.