| Primary | Division I | Grades one, two, and three |
| Intermediate | Division II | Grades four, five, and six |
| Junior high school | Division III | Grades seven, eight and nine |
| Senior High School or collegiate institute | Division IV | Grades ten, eleven and twelve |
Primary
Pre-School: 4-5 year olds
Kindergarten: 5-6 year olds
Grade 1: 6-7 year olds
Grade 2: 7-8 year olds
Grade 3: 8-9 year olds
Grade 4: 9-10 year olds
Grade 5: 10-11 year olds
Grade 6: 11-12 year olds
Grade 7: 12-13 year olds
Grade 8: 13-14 year olds
Secondary
Grade 9: 14-15 year olds
Grade 10: 15-16 year olds
Grade 11: 16-17 year olds