Costen Schools – LA
Teachers trained in “The Art of Teaching”
| Beatty | Corey | Whitaker |
| Emery | Gilbert | Pendleton |
| El Marino | El Rincon | Farragut |
| La Ballona | Linwood Howe |
| Arnold | Dickerson | Landell | Morris |
| Gallatin | Lewis |
| Old River | Rio Hondo |
| Center Street | Richmond Street |
| Cox | Courreges | Gisler | Newland |
| Oka | Plavan | Tamura |
| Acacia | Beechwood | Fisler | Laguna Road | Orangethorpe |
| Valencia Park | Woodcrest | Maple | Raymond | Richman |
| Addams | Anderson | William Green | Billy Mitchell |
| Franklin D. Roosevelt | Smith | Mark Twain |
Live Oak(Northern CA)
| Green Acres | Live Oak |
| Alvarado | Burbank | Bonnie Smith | Edison | Garfield |
| Gompers | Grant | Patrick Henry | Lafayette | Herrera |
| Lincoln | Riley | Robinson | Roosevelt | Signal Hill |
| Tincher | Whittier | Willard | Barton |
| Hopkinson | Lee | Los Alamitos |
| McGaugh | Rossmoor | Weaver |
| Bradoaks | Wild Rose | Plymouth |
| Mayflower | Monroe |
Mt. Pleasant (Northern CA)
| Mt. Pleasant | Sanders |
| Escalona | Lampton | Morrison | Eastwood |
| Gardenhill | La Pluma | Dollan | Sanchez |
Oak Grove (Northern CA)
| Oak Ridge | Taylor Elementary | Santa Teresa |
Pajaro Valley (Northern CA)
| Hyde | Mar Vista | Mintie White |
| Radcliff | Rio Del Mar | Valencia |
| Lexington | San Jose | Vejar |
| Golden Springs | La Verne | Armstrong |
| Blandford | Hollingworth | Jellick | Killian |
| Northam | Oswalt Academy | Rowland | Shelyn |
| Telesis | Ybarra | Yorbita | Hurley |
| Villacorta | Rorimer |
San Lorenzo Valley (Northern CA)
| Boulder Creek | San Lorenzo Valley |
Santa Cruz City (Northern CA)
| Bay View | DeLaveaga |
| Gault | Westlake |
| Edison | McKinley | John Muir |
| Will Rogers | Roosevelt |
Scotts Valley Unified School District (Northern CA)
| Vine Hill |
| Hickory |
| Arroyo | Beswick | Estock | Guin Foss |
| Heideman | Hicks Canyon | Loma Vista | Nelson |
| Myford | Red Hill | Tustin Memorial | Tustin Ranch |
| Peters Canyon | Heritage |
| UCLA Lab School |
| Andrews | Hoover | Mill | Orange Grove |
| Phelan | Sorensen | West Whittier | Jackson |
| 138th Street | Juan Cabrillo | Juan De Anza |