There’s a huge variety of great method books out there now. Most of these are available online, but please consider supporting your local music store (scroll down for recommended stores in Toronto).
Here are my favourites:
Piano Adventures by Nancy and Randall Faber
For beginning and early level students
Celebration Series, Royal Conservatory of Music
For more advanced students who enjoy a variety of classical and modern idioms
Connections by Christopher Norton
A supplement to the Celebration Series including popular idioms
Wunder Keys by Trevor and Andrea Dow
For very young students to introduce the piano and finger movements
Canadian Contemporary Repertoire Series, Conservatory Canada
For more advanced students who prefer popular, rock and jazz
Toronto Music Stores Who Usually Have Books in Stock (it’s always wise to call ahead to be sure):
Janet Fryer 