School Directory
| School/Organization | City | State | Country |
|---|---|---|---|
| Kingswood Regional High School | Wolfeboro | New Hampshire | United States |
| Kingwood Park High School | Kingwood | Texas | United States |
| Klein High School | Spring | Texas | United States |
| Knox Community High School | Knox | Indiana | United States |
| Korey Stringer Institute | Storrs | Connecticut | United States |
| La Costa Canyon High School | Carlsbad | California | United States |
| La Crescent - Hokah Secondary School | La Crescent | Minnesota | United States |
| La Jolla Country Day Schools | La Jolla | California | United States |
| La Sierra High School | riverside | California | United States |
| La Vega High School | Waco | Texas | United States |
| Lafayette Central Catholic Jr/Sr High School | Lafayette | Indiana | United States |
| Lafayette High School | Lexington | Kentucky | United States |
| Laguna Beach High School | Laguna Beach | California | United States |
| Lake Central High School | St. John | Indiana | United States |
| Lake Orion High School | Lake Orion | Michigan | United States |
| Lake Ridge High School | Mansfield | Texas | United States |
| Lake Station Edison High School | Lake Station | Indiana | United States |
| Lake Washington High School | Kirkland | Washington | United States |
| Lakewood High School | Lakewood | California | United States |
| Lampeter Strasburg School District | Lancaster | Pennsylvania | United States |
| Lancaster Country Day School | Lancaster | Pennsylvania | United States |
| Lancaster Mennonite School | Lancaster | Pennsylvania | United States |
| Langham Creek High School | Houston | Texas | United States |
| Laurel High School | Laurel | Delaware | United States |
| Lee-Davis High School | Mechanicsville | Virginia | United States |
| Leesburg High School | Leesburg | Florida | United States |
| Lena High School | Lena | Wisconsin | United States |
| Leon High School | Jewett | Texas | United States |
| Leuzinger High School | Lawndale | California | United States |
| Lexington Senior High School/WFBH | Lexington | North Carolina | United States |
| Lexington Christian Academy | Lexington | Kentucky | United States |
| Liberty Christian School | Argyle | Texas | United States |
| Liberty High School | Renton | Washington | United States |
| Licking Valley High School | Newark | Ohio | United States |
| Lincoln County High School | Stanford | Kentucky | United States |
| Lincoln Northeast High School | Lincoln | Nebraska | United States |
| Lincoln School | Providence | Rhode Island | United States |
| Lincoln-Way Central High School | New Lenox | Illinois | United States |
| Lindale High School | Lindale | Texas | United States |
| Lindbergh High School | St Louis | Missouri | United States |
| Lindhurst High School | Olivehurst | California | United States |
| Liverpool High School/ Syracuse Orthopedic Specialists | Liverpool | New York | United States |
| Lockland High School | Lockland | Ohio | United States |
| Logan Elm High School | Circleville | Ohio | United States |
| Lompoc High School | Lompoc | California | United States |
| Longmont High School | Longmont | Colorado | United States |
| Loris High School/ Middle School | Loris | South Carolina | United States |
| Louisa Muscatine High School | Letts | Iowa | United States |
| Ludlow High School | Ludlow | Massachusetts | United States |
| Luxemburg-Casco High School | Luxemburg | Wisconsin | United States |
| Lynhurst 7th & 8th Grade Center | Indianapolis | Indiana | United States |
| Lynhurst 7th and 8th Center | Indianapolis | Indiana | United States |
| Lynnwood High School | Bothell | Washington | United States |
| Lyons Township High School | La Grange | Illinois | United States |
| Madison High School | Madison | Illinois | United States |
| Madison High School | Adrian | Michigan | United States |
| Magnolia High School | Magnolia | Texas | United States |
| Maine West High School | Des Plaines | Illinois | United States |
| Malvern Preparatory School | Malvern | Pennsylvania | United States |
| Manchester Memorial High School | Manchester | New Hampshire | United States |
| Manchester West High School | Manchester | New Hampshire | United States |
| Mankato East High School, Mankato, MN | Mankato | Minnesota | United States |
| Mankato West High School | Mankato | Minnesota | United States |
| Mansfield High School | Mansfield | Texas | United States |
| Maple Mountain High School | Spanish Fork | Utah | United States |
| Maranatha Christian Schools | San Diego | California | United States |
| Marcellus High School | Marcellus | New York | United States |
| Marietta High School | Marietta | Georgia | United States |
| Marin Academy | San Rafael | California | United States |
| Marion Harding High School | Marion | Ohio | United States |
| Marlborough School | Los Angeles | California | United States |
| Mary Persons High School | Forsyth | Georgia | United States |
| Marysville High School | Marysville | California | United States |
| Maryvale High School | Phoenix | Arizona | United States |
| Maryvale Preparatory School | Lutherville | Maryland | United States |
| McCallie School | Chattanooga | Tennessee | United States |
| McClain High School | Greenfield | Ohio | United States |
| McCluer High School | Florissant | Missouri | United States |
| Mccluer North High School | Florissant | Missouri | United States |
| Medford High School | Medford | Massachusetts | United States |
| Memorial Health | Marysville | Ohio | United States |
| Memphis University School | Memphis | Tennessee | United States |
| Mercersburg Academy | Mercersburg | Pennsylvania | United States |
| Mercy High School | Baltimore | Maryland | United States |
| Mercy Hospital/Westminster Christian Academy | Town and Country | Missouri | United States |
| Mercy Sports Medicine - Durango High School | Durango | Colorado | United States |
| Merrillville High School | Merrillville | Indiana | United States |
| Mesa Ridge High School | Colo Spgs | Colorado | United States |
| Mesquite High School | Gilbert | Arizona | United States |
| Mesquite Poteet High school | Mesquite | Texas | United States |
| Metro Tech High School | Phoenix | Arizona | United States |
| Midd-West High School | Middleburg | Pennsylvania | United States |
| Middlesex School | Concord | Massachusetts | United States |
| Middleton HS | Tampa | Florida | United States |
| Middletown HS North | Middletown | New Jersey | United States |
| Milford High School | Highland | Michigan | United States |
| Millbury Jr Sr High School | Millbury | Massachusetts | United States |
| Mission College Preparatory Catholic High School | San Luis Obispo | California | United States |
| Mission Oak High School | Tulare | California | United States |
| Moe Moe High School | Tucson | Arizona | United States |