I grew up in Southern Ontario as well.
I remember having VIC-20 and C64 computers in elementary school, and even a few Amigas in my high school art class. I actually got a couple of joysticks and a bunch of pirated games(including Hollywood Poker Pro) from the art teacher, in exchange for teaching my fellow students how to use Deluxe Paint. I even sold them some of my Amiga equipment before I graduated.
Before it went under, we always had Commodore computers in school, with the exception of those awesomely bizarre Unisys Icon terminals. After that, it was all generic PCs or Dell.