School Directory
| School/Organization | City | State | Country |
|---|---|---|---|
| Cibola High School | Yuma | Arizona | United States |
| Cincinnati Children's Hospital Medical Center - Cincinnati Christian Schools | Hamilton | Ohio | United States |
| Cincinnati Gymnastics Academy | Fairfield | Ohio | United States |
| Clarinda High School | Clarinda | Iowa | United States |
| Clark High School | Plano | Texas | United States |
| Clark Montessori High School/Cincinnati Children's Hospital Medical Center | Cincinnati | Ohio | United States |
| Clarke County High School | Athens | Georgia | United States |
| Clearfield High School | Clearfield | Utah | United States |
| Clearwater High School | Clearwater | Kansas | United States |
| Cleveland High School | Rio Rancho | New Mexico | United States |
| Clinton High School | Clinton | South Carolina | United States |
| Clover High School | Clover | South Carolina | United States |
| Cloverdale High School | Cloverdale | Indiana | United States |
| Clovis High School | Clovis | New Mexico | United States |
| Coast Union High School | Cambria | California | United States |
| Cody High School | Cody | Wyoming | United States |
| Cohasset High School | Cohasset | Massachusetts | United States |
| Colchester High School | Colchester | Vermont | United States |
| Coleman School District | Coleman | Wisconsin | United States |
| Colfax High School | Colfax | Wisconsin | United States |
| College Station High School | COLLEGE STATION | Texas | United States |
| Colonie HIgh school | Albany | New York | United States |
| Colorado Rapids Academy | Commerce City | Colorado | United States |
| Colton High School | Colton | California | United States |
| Columbia Central High School | Brooklyn | Michigan | United States |
| Columbia College | Columbia | Missouri | United States |
| Columbia High School | Columbia | North Carolina | United States |
| Columbus Community High School | Columbus Junction | Iowa | United States |
| Columbus Lakeview High School | Columbus | Nebraska | United States |
| Columbus North High School | Columbus | Indiana | United States |
| Commerce ISD | Commerce | Texas | United States |
| Community Colleges of Spokane | Spokane | Washington | United States |
| Concord High School | Concord | North Carolina | United States |
| Concordia International School Shanghai | Pudong Xinqu | Shanghai Shi | China |
| Conemaugh Township Area High School | Davidsville | Pennsylvania | United States |
| Conner High School | Hebron | Kentucky | United States |
| Conway High School | Conway | South Carolina | United States |
| Corona High School | Corona | California | United States |
| Corona Santiago High School | Corona | California | United States |
| Coronado High School | El Paso | Texas | United States |
| Corsicana High School | Corsicana | Texas | United States |
| Costa Mesa High School | Costa Mesa | California | United States |
| Coupeville High School | Coupeville | Washington | United States |
| Covenant Christian High School | DeMotte | Indiana | United States |
| Covington Community Schools | Covington | Indiana | United States |
| Cowanesque Valley High School | Westfield | Pennsylvania | United States |
| Cozad Community Schools | Cozad | Nebraska | United States |
| Crawfordsville Community School Corporation | Crawfordsville | Indiana | United States |
| Creosote Model High School | Carrollton | Texas | United States |
| Crestview High School | Ashland | Ohio | United States |
| CRISP COUNTY HIGH SCHOOL | Cordele | Georgia | United States |
| Critical Mass Health LLC | Las Vegas | Nevada | United States |
| Croatan High School | Newport | North Carolina | United States |
| Cross Creek High School | AUGUSTA | Georgia | United States |
| Crossings Christian School | Oklahoma City | Oklahoma | United States |
| CROTON HARMON UFSD | CROTON ON HUDSON | New York | United States |
| Culver Community High School | Culver | Indiana | United States |
| Currituck County Middle School | Barco | North Carolina | United States |
| Curtis High School | Univeristy Place | Washington | United States |
| Cushing Academy | Ashburnham | Massachusetts | United States |
| D.H. Conley High School | Greenville | North Carolina | United States |
| Dallas High School | Dallas | Oregon | United States |
| Dallastown Area High School | Dallastown | Pennsylvania | United States |
| Davenport Assumption High School | Davenport | Iowa | United States |
| Davenport Central High School | Davenport | Iowa | United States |
| Davenport North High School | Davenport | Iowa | United States |
| David Crockett High School | Jonesborough | Tennessee | United States |
| DC International School | Washington | District of Columbia | United States |
| De La Salle High School | Concord | California | United States |
| De Pere High School | De Pere | Wisconsin | United States |
| Decatur Central High School | Indianapolis | Indiana | United States |
| Deer Park School District | Deer Park | New York | United States |
| Deerfield Academy | DEERFIELD | Massachusetts | United States |
| Deering High School | Portland | Maine | United States |
| Del Norte High School | San Diego | California | United States |
| Delphos Jefferson High School | Delphos | Ohio | United States |
| Delran High School | Delran | New Jersey | United States |
| Deming High School | Deming | New Mexico | United States |
| DePaul Cristo Rey High School | Cincinnati | Ohio | United States |
| Derry Area High School | Derry | Pennsylvania | United States |
| Desert Hills High School | Saint George | Utah | United States |
| Desert Hot Springs High School | Desert Hot Springs | California | United States |
| Desoto Central High School | Southaven | Mississippi | United States |
| Diamond Bar High School | Diamond Bar | California | United States |
| Dieruff High School | Allentown | Pennsylvania | United States |
| Dignity Health Outreach Athletic Training | Gilbert | Arizona | United States |
| District of Columbia International Public Charter School | Washington | District of Columbia | United States |
| Dobyns-Bennett High School | Kingsport | Tennessee | United States |
| Donaldsonville | donaldsonville | Louisiana | United States |
| Donegal High School | Mount Joy | Pennsylvania | United States |
| Dorman High School | Roebuck | South Carolina | United States |
| Dorsey High School (Team HEAL) | Los Angeles | California | United States |
| Doss High School | Louisville | Kentucky | United States |
| Douglas High School | Douglas | Wyoming | United States |
| Douglas Unified School District #27 | Douglas | Arizona | United States |
| Duchesne Academy of the Sacred Heart | Omaha | Nebraska | United States |
| Dulaney High School | Lutherville-Timonium | Maryland | United States |
| Dumas High School | Dumas | Texas | United States |
| Dunmore High School | Dunmore | Pennsylvania | United States |
| Durango High School | Durango | Colorado | United States |