| Abbreviation | Definition |
|---|---|
| BLES | Berkeley Lake Elementary School |
| BLFAC | Blue Lake Fine Arts Camp |
| BLH | Buffalo Lake- Hector Schools |
| BLHMS | Bernard L. Hope Middle School (Holt, MI) |
| BLHS | Ben Lomond High School |
| BLHS | Betsy Layne High School |
| BLHS | Bishop LeBlond High School |
| BLHS | Bishop Luers High School |
| BLHS | Bushwick Leaders High School |
| BLIS | Bilkent Laboratory and International School |
| BLIS | Bitame Lucia International School |
| BLISS | Bishop Lawi Imathiu Secondary School |
| BLMS | Bert Lynn Middle School |
| BLMS | Bon Lin Middle School |
| BLMS | Buck Lodge Middle School |
| BLPES | British Library of Politics, Economics and Sociology (London School of Economics; England; UK) |
| BLPS | Batesburg Leesville Primary School |
| BLPS | Blackburn Lake Primary School |
| BLPS | Book Lovers Program for Schools |
| BLS | Boston Latin School |