On May 10, 1960, the Etobicoke Board of Education agreed to construct Vincent Massey Collegiate Institute at a cost of $1,120,000 with 14 standard classrooms, 1 art, 1 music, 2 science labs, 1 library, 1 home economics, 1 shop, 1 typing room, double gym and cafeteria.

[6] During its existence, it produced two Reach for the Top National Championship teams in 1966 and 1978, and was the only high school in Canada to accomplish this during the original 20 year Canadian Broadcasting Corporation production of the show.

After its closure in 1985 due to low enrollment, the building served for several years as an adult education centre and later moved to Burnhamthorpe Collegiate Institute in September 1987.

[citation needed] The Pocock school began leasing the Massey site in September 1987.

The MSSB originally offered the site of the former Mimico High School (now John English Junior Middle School) to relocate its student body there, but the MSSB rejected the transfer due to an outcry of protest (Power received its campus outlet in September 1985 at the former Alderwood site, and becoming Father John Redmond in 1986.)