| Abbreviation | Definition |
|---|---|
| FSHS | Fort Stockton High School |
| FSHS | Fort Street High School |
| FSHS | Franklin Simpson High School |
| FSHS | Franklin-Simpson High School |
| FSHS | Free State High School |
| FSHS | Fremont Senior High School |
| FSHS | French Settlement High School |
| FSI | Frontier School of Innovation |
| FSIR | Florida School Indicators Report |
| FSIS | Fawzia Sultan International School |
| FSIT | Faculty School Improvement Team |
| FSK | Frontier School of Karate |
| FSK | Frontier Schools of Karate |
| FSL | Foundations in School Leadership |
| FSL | Future School Leaders |
| FSLA | Florida School Leader Assessment |
| FSLA | Future School Leaders Academy |
| FSLC | First School Leaving Certificate |
| FSLN | Future School Leaders Network |
| FSLO | Family School Liaison Officer |