| Abbreviation | Definition |
|---|---|
| BMHS | Bishop Miege High School |
| BMHS | Bishop Montgomery High School |
| BMHS | Blue Mountain High School |
| BMHS | Bohemia Manor High School |
| BMHS | Brien McMahon High School |
| BMHS | Brother Martin High School |
| BMI | Betty Memorial Institute |
| BMLSS | Bracebridge Muskoka Lakes Secondary School |
| BMMS | Bell Mountain Middle School |
| BMMS | Beverley Manor Middle School |
| BMMS | Beverly Manor Middle School |
| BMMS | Black Mountain Middle School |
| BMMS | Bohemia Manor Middle School |
| BMMS | Bradshaw Mountain Middle School |
| BMMS | Burleigh Manor Middle School |
| BMPS | Bhagwan Mahaveer Public School |
| BMS | Beaufort Middle School |
| BMS | Becker Middle School |
| BMS | Bedford Middle School |
| BMS | Bemidji Middle School |