| SCHS | Sage Creek High School 
| Others |
| SCHS | Saint Catherine High School
| Others |
| SCHS | San Clemente High School
| Others |
| SCHS | Santa Clara High School
| Others |
| SCHS | Santa Cruz High School
| Others |
| SCHS | Saudi Commission for Health Specialties
| Others |
| SCHS | School of Community and Health Sciences
| Others |
| SCHS | Scott County High School
| Others |
| SCHS | Sevier County High School
| Others |
| SCHS | Shadow Creek High School
| Others |
| SCHS | Sheboygan County Humane Society
| Others |
| SCHS | Sheldon Clark High School
| Others |
| SCHS | Silver Creek High School
| Others |
| SCHS | Snow Canyon High School
| Others |
| SCHS | South Caldwell High School
| Others |
| SCHS | South Carleton High School
| Others |
| SCHS | South Carroll High School
| Others |
| SCHS | South Central High School
| Others |
| SCHS | South Charleston High School
| Others |
| SCHS | South Charnwood High School
| Others |
| SCHS | South Christian High School
| Others |
| SCHS | South Cobb High School
| Others |
| SCHS | South County High School
| Others |
| SCHS | Spring Creek High School
| Others |
| SCHS | Springbank Community High School
| Others |
| SCHS | Springfield Catholic High School
| Others |
| SCHS | St Charles High School
| Others |
| SCHS | St Cloud High School
| Others |
| SCHS | Standish Community High School
| Others |
| SCHS | Stark County High School
| Others |
| SCHS | State Center for Health Statistics
| Others |
| SCHS | Steele Canyon High School
| Others |
| SCHS | Steinbach Christian High School
| Others |
| SCHS | Stephens County High School
| Others |
| SCHS | Stewarts Creek High School
| Others |
| SCHS | Stoney Creek High School
| Others |
| SCHS | Streatham and Clapham High School
| Others |
| SCHS | Sturgeon Composite High School
| Others |
| SCHS | Summer Creek High School
| Others |
| SCHS | Sussex Central High School
| Others |
| SCHS | Suzanne Cory High School
| Others |
| SCHS | Sylmar Charter High School
| Others |