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Among "All Schools," view the twenty boarding schools with the "lowest teacher:student ratio." First, some important notes:
- Teacher:student ratios are only one indicator of student attention, as they merely indicate the number of adults on campus (in a teacher-related capacacity) relative to the number of students.
- The teacher:student ratio is different than the average class size at a school and should not be confused as such.
| Sorted by range (alphabetically within range) | * Indicates Boarding Grades Offered | ||
|
Boarding
School
|
School Type
|
Grades*
|
Teacher:Student Ratio
|
| 1.-2. Southwestern Academy | Co-Ed | 7-12, PG | 1:1 |
| 1.-2. Wentworth Military Academy & College | Co-Ed | 9-12, PG | 1:1 |
| 3.-4. The Oxford Academy | All-Boys | 9-12, PG | 1:2 |
| 3.-4. Scattergood Friends School | Co-Ed | 9-12, PG | 1:2 |
| 5.-10. Brandon Hall School | Co-Ed | 4-12, PG | 1:3 |
| 5.-10. The Forman School | Co-Ed | 9-12, PG | 1:3 |
| 5.-10. Landmark School | Co-Ed | 9-12 | 1:3 |
| 5.-10. Oliverian School | Co-Ed | 9-12, PG | 1:3 |
| 5.-10. The Outdoor Academy | Co-Ed | 10-11 | 1:3 |
| 5.-10. White Mountain School | Co-Ed | 9-12, PG | 1:3 |
| 11.-19. Besant Hill School (Formerly Happy Valley School) | Co-Ed | 9-12 | 1:4 |
| 11.-19. Darrow School | Co-Ed | 9-12 | 1:4 |
| 11.-19. The Gow School | All-Boys | 7-12, PG | 1:4 |
| 11.-19. High Mowing School | Co-Ed | 9-12 | 1:4 |
| 11.-19. Hoosac School | Co-Ed | 8-12, PG | 1:4 |
| 11.-19. The Marvelwood School | Co-Ed | 9-12, PG | 1:4 |
| 11.-19. Olney Friends School | Co-Ed | 9-12 | 1:4 |
| 11.-19. Purnell School | All-Girls | 9-12 | 1:4 |
| 11.-19. Shawnigan Lake School | Co-Ed | 8-12 | 1:4 |
| 20.-65. Academy of the Holy Family | All-Girls | 9-12, PG | 1:5 |
| Sorted by range (alphabetically within range) | * Indicates Boarding Grades Offered | ||
|
Boarding
School
|
School Type
|
Grades*
|
Teacher:Student Ratio
|
| 20.-65. Andrews Osborne Academy | Co-Ed | 7-12 | 1:5 |
| 20.-65. Brooks School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Buxton School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Cate School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Chapel Hill-Chauncy Hall | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Choate Rosemary Hall | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Christ School | All-Boys | 8-12 | 1:5 |
| 20.-65. Colorado Rocky Mountain School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Colorado Timberline Academy | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Deerfield Academy | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Dublin School | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Eagle Hill School | Co-Ed | 8-12 | 1:5 |
| 20.-65. Emma Willard School | All-Girls | 9-12, PG | 1:5 |
| 20.-65. The Ethel Walker School | All-Girls | 9-12 | 1:5 |
| 20.-65. Grand River Academy | All-Boys | 9-12, PG | 1:5 |
| 20.-65. Groton School | Co-Ed | 8-12 | 1:5 |
| 20.-65. Idyllwild Arts Academy | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Loomis Chaffee School | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Mercersburg Academy | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Middlesex School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Midland School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Millbrook School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Milton Academy | Co-Ed | 9-12 | 1:5 |
| 20.-65. Miss Hall's School | All-Girls | 9-12 | 1:5 |
| 20.-65. New Hampton School | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Oldfields School | All-Girls | 8-12, PG | 1:5 |
| 20.-65. Perkiomen School | Co-Ed | 7-12, PG | 1:5 |
| 20.-65. The Phelps School | All-Boys | 7-12, PG | 1:5 |
| 20.-65. Phillips Academy Andover | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Phillips Exeter Academy | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Proctor Academy | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. St. Andrew's School - RI | Co-Ed | 9-12 | 1:5 |
| 20.-65. St. Andrew's School, DE | Co-Ed | 9-12 | 1:5 |
| 20.-65. St. George's School | Co-Ed | 9-12 | 1:5 |
| 20.-65. St. Mark's School | Co-Ed | 9-12 | 1:5 |
| 20.-65. St. Paul's School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Salisbury School | All-Boys | 9-12, PG | 1:5 |
| 20.-65. San Domenico School | All-Girls | 9-12 | 1:5 |
| 20.-65. Sedbergh School | Co-Ed | 7-12 | 1:5 |
| 20.-65. South Kent School | All-Boys | 9-12, PG | 1:5 |
| 20.-65. Suffield Academy | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. The Thacher School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Tilton School | Co-Ed | 9-12, PG | 1:5 |
| 20.-65. Verde Valley School | Co-Ed | 9-12 | 1:5 |
| 20.-65. Westminster School | Co-Ed | 9-12, PG | 1:5 |
| 66.-109. Annie Wright School | All-Girls | 9-12 | 1:6 |
| 66.-109. Avon Old Farms School | All-Boys | 9-12, PG | 1:6 |
| 66.-109. Berkshire School | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Blue Ridge School | All-Boys | 9-12 | 1:6 |
| 66.-109. Brewster Academy | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. The Cambridge School of Weston | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Canterbury School | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Chatham Hall | All-Girls | 9-12 | 1:6 |
| 66.-109. Concord Academy | Co-Ed | 9-12 | 1:6 |
| 66.-109. Episcopal High School | Co-Ed | 9-12 | 1:6 |
| 66.-109. Fountain Valley School of Colorado | Co-Ed | 9-12 | 1:6 |
| 66.-109. Foxcroft School | All-Girls | 9-12 | 1:6 |
| 66.-109. Gould Academy | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. The Governor's Academy (formerly Governor Dummer Academy) | Co-Ed | 9-12 | 1:6 |
| 66.-109. Grier School | All-Girls | 6-12, PG | 1:6 |
| 66.-109. The Hotchkiss School | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Hyde-Bath | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Interlochen Arts Academy | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Kents Hill School | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Kimball Union Academy | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Linden Hall | All-Girls | 6-12, PG | 1:6 |
| 66.-109. Lowell Whiteman School | Co-Ed | 9-12 | 1:6 |
| 66.-109. The MacDuffie School | Co-Ed | 9-12 | 1:6 |
| 66.-109. The Madeira School | All-Girls | 9-12 | 1:6 |
| 66.-109. The Masters School | Co-Ed | 9-12 | 1:6 |
| 66.-109. Miller School | Co-Ed | 8-12, PG | 1:6 |
| 66.-109. Northwood School | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Ojai Valley School | Co-Ed | 3-12 | 1:6 |
| 66.-109. Orme School | Co-Ed | 8-12, PG | 1:6 |
| 66.-109. Peddie School | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Pomfret School | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. St. Margaret's School | All-Girls | 8-12 | 1:6 |
| 66.-109. St. Timothy's School | All-Girls | 9-12, PG | 1:6 |
| 66.-109. Solebury School | Co-Ed | 9-12 | 1:6 |
| 66.-109. Squaw Valley Academy | Co-Ed | 6-12 | 1:6 |
| 66.-109. Stoneleigh-Burnham School | All-Girls | 7-12, PG | 1:6 |
| 66.-109. Tabor Academy | Co-Ed | 9-12 | 1:6 |
| 66.-109. Thomas Jefferson School | Co-Ed | 7-12, PG | 1:6 |
| 66.-109. Virginia Episcopal School | Co-Ed | 9-12 | 1:6 |
| 66.-109. Wayland Academy | Co-Ed | 9-12 | 1:6 |
| 66.-109. West Nottingham Academy | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. Western Reserve Academy | Co-Ed | 9-12, PG | 1:6 |
| 66.-109. The Winchendon School | Co-Ed | 8-12, PG | 1:6 |
| 66.-109. Woodberry Forest School | All-Boys | 9-12 | 1:6 |
| 110.-150. Asheville School | Co-Ed | 9-12 | 1:7 |
| 110.-150. Blair Academy | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. CFS, The School at Church Farm | All-Boys | 7-12 | 1:7 |
| 110.-150. Cheshire Academy | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. Christchurch School | All-Boys | 8-12, PG | 1:7 |
| 110.-150. Conserve School | Co-Ed | 9-12 | 1:7 |
| 110.-150. The Delphian School | Co-Ed | 3-12 | 1:7 |
| 110.-150. Dunn School | Co-Ed | 9-12 | 1:7 |
| 110.-150. George School | Co-Ed | 9-12 | 1:7 |
| 110.-150. The Gunnery | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. Hebron Academy | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. Hill School | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. Holderness School | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. Kent School | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. The Kiski School | All-Boys | 9-12, PG | 1:7 |
| 110.-150. The Knox School | Co-Ed | 7-12 | 1:7 |
| 110.-150. La Lumiere School | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. Lake Forest Academy | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. Lawrence Academy | Co-Ed | 9-12 | 1:7 |
| 110.-150. Leysin American School in Switzerland | Co-Ed | 8-12, PG | 1:7 |
| 110.-150. Nawa Academy | Co-Ed | 7-12 | 1:7 |
| 110.-150. Northfield Mount Hermon School | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. Oakdale Christian Academy | Co-Ed | 7-12 | 1:7 |
| 110.-150. Oregon Episcopal School | Co-Ed | 9-12 | 1:7 |
| 110.-150. Portsmouth Abbey School | Co-Ed | 9-12 | 1:7 |
| 110.-150. St. Andrew's-Sewanee School | Co-Ed | 9-12 | 1:7 |
| 110.-150. St. Anne's-Belfield School | Co-Ed | 9-12 | 1:7 |
| 110.-150. St. Stephen's Episcopal School | Co-Ed | 8-12 | 1:7 |
| 110.-150. St. Thomas More School | All-Boys | 8-12, PG | 1:7 |
| 110.-150. Salem Academy | All-Girls | 9-12 | 1:7 |
| 110.-150. Shattuck-St. Mary's School | Co-Ed | 6-12, PG | 1:7 |
| 110.-150. The Storm King School | Co-Ed | 9-12 | 1:7 |
| 110.-150. TASIS The American School in England | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. TMI -The Episcopal School of Texas | Co-Ed | 9-12 | 1:7 |
| 110.-150. Vermont Academy | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. The Webb School | Co-Ed | 7-12, PG | 1:7 |
| 110.-150. The Webb Schools | Co-Ed | 9-12 | 1:7 |
| 110.-150. Westover School | All-Girls | 9-12 | 1:7 |
| 110.-150. Westtown School | Co-Ed | 9-12 | 1:7 |
| 110.-150. Wilbraham & Monson Academy | Co-Ed | 9-12, PG | 1:7 |
| 110.-150. The Williston Northampton School | Co-Ed | 9-12, PG | 1:7 |
| 151.-181. Baylor School | Co-Ed | 9-12 | 1:8 |
| 151.-181. Brenau Academy | All-Girls | 9-12, PG | 1:8 |
| 151.-181. Camden Military Academy | All-Boys | 7-12, PG | 1:8 |
| 151.-181. CCI The Renaissance School | Co-Ed | 10-12, PG | 1:8 |
| 151.-181. Cranbrook Schools | Co-Ed | 9-12 | 1:8 |
| 151.-181. Cushing Academy | Co-Ed | 9-12, PG | 1:8 |
| 151.-181. Dana Hall School | All-Girls | 9-12 | 1:8 |
| 151.-181. Garrison Forest School | All-Girls | 8-12 | 1:8 |
| 151.-181. Georgetown Preparatory School | All-Boys | 9-12 | 1:8 |
| 151.-181. Havergal College | All-Girls | 9-12 | 1:8 |
| 151.-181. Howe Military School & Summer Camp | Co-Ed | 5-12 | 1:8 |
| 151.-181. The Hun School of Princeton | Co-Ed | 9-12, PG | 1:8 |
| 151.-181. Indian Springs School | Co-Ed | 9-12 | 1:8 |
| 151.-181. Lawrenceville School | Co-Ed | 9-12, PG | 1:8 |
| 151.-181. The Leelanau School | Co-Ed | 9-12 | 1:8 |
| 151.-181. Maharishi Academy of Total Knowledge | All-Boys | 9-12 | 1:8 |
| 151.-181. Massanutten Military Academy | Co-Ed | 7-12, PG | 1:8 |
| 151.-181. McCallie School | All-Boys | 9-12 | 1:8 |
| 151.-181. Miss Porter's School | All-Girls | 9-12, PG | 1:8 |
| 151.-181. Oakwood Friends School | Co-Ed | 9-12 | 1:8 |
| 151.-181. The Pennington School | Co-Ed | 7-12 | 1:8 |
| 151.-181. The Putney School | Co-Ed | 9-12 | 1:8 |
| 151.-181. Rabun Gap-Nacoochee School | Co-Ed | 7-12 | 1:8 |
| 151.-181. Rosseau Lake College | Co-Ed | 7-12 | 1:8 |
| 151.-181. St. Johnsbury Academy | Co-Ed | 9-12, PG | 1:8 |
| 151.-181. Saint Mary's School | All-Girls | 9-12 | 1:8 |
| 151.-181. San Marcos Baptist Academy | Co-Ed | 7-12 | 1:8 |
| 151.-181. Santa Catalina School | All-Girls | 9-12 | 1:8 |
| 151.-181. Stanstead College | Co-Ed | 7-12 | 1:8 |
| 151.-181. The Stony Brook School | Co-Ed | 7-12 | 1:8 |
| 151.-181. Trinity Pawling School | All-Boys | 9-12, PG | 1:8 |
| 182.-194. Ashbury College | Co-Ed | 9-12 | 1:9 |
| 182.-194. Bridgton Academy | All-Boys | 12-12, PG | 1:9 |
| 182.-194. Country Day School, Costa Rica | Co-Ed | 8-12 | 1:9 |
| 182.-194. Culver Academies | Co-Ed | 9-12, PG | 1:9 |
| 182.-194. Hawaii Preparatory Academy | Co-Ed | 6-12, PG | 1:9 |
| 182.-194. Randolph-Macon Academy | Co-Ed | 6-12, PG | 1:9 |
| 182.-194. St. Andrew's College | All-Boys | 6-12 | 1:9 |
| 182.-194. Saint Andrew's School | Co-Ed | 9-12 | 1:9 |
| 182.-194. St. Catherine's Military Academy | All-Boys | 4-8 | 1:9 |
| 182.-194. Saint James School | Co-Ed | 8-12 | 1:9 |
| 182.-194. Subiaco Academy | All-Boys | 9-12 | 1:9 |
| 182.-194. Woodside Priory School | Co-Ed | 9-12 | 1:9 |
| 182.-194. Wyoming Seminary Upper School | Co-Ed | 9-12, PG | 1:9 |
| 195.-213. Admiral Farragut Academy | Co-Ed | 6-12 | 1:10 |
| 195.-213. The Athenian School | Co-Ed | 9-12 | 1:10 |
| 195.-213. The Brook Hill School | Co-Ed | 8-12 | 1:10 |
| 195.-213. Darlington School | Co-Ed | 9-12, PG | 1:10 |
| 195.-213. Fishburne Military School | All-Boys | 8-12 | 1:10 |
| 195.-213. Flintridge Sacred Heart Academy | All-Girls | 9-12 | 1:10 |
| 195.-213. Fork Union Military Academy | All-Boys | 6-12, PG | 1:10 |
| 195.-213. Fryeburg Academy | Co-Ed | 9-12, PG | 1:10 |
| 195.-213. George Stevens Academy | Co-Ed | 9-12 | 1:10 |
| 195.-213. The Hockaday School | All-Girls | 8-12 | 1:10 |
| 195.-213. Oak Hill Academy | Co-Ed | 8-12 | 1:10 |
| 195.-213. Ridley College | Co-Ed | 5-12, PG | 1:10 |
| 195.-213. Riverside Military Academy | All-Boys | 7-12 | 1:10 |
| 195.-213. St. John's Northwestern Military Academy | All-Boys | 7-12 | 1:10 |
| 195.-213. Stevenson School | Co-Ed | 9-12 | 1:10 |
| 195.-213. Stuart Hall School | All-Girls | 8-12 | 1:10 |
| 195.-213. Valley Forge Military Academy | All-Boys | 7-12, PG | 1:10 |
| 195.-213. Villanova Preparatory School | Co-Ed | 9-12 | 1:10 |
| 195.-213. Wasatch Academy | Co-Ed | 9-12, PG | 1:10 |
| 214.-216. Brentwood College School | Co-Ed | 9-12 | 1:11 |
| 214.-216. Hargrave Military Academy | All-Boys | 7-12, PG | 1:11 |
| 214.-216. Saint John's Preparatory School | Co-Ed | 9-12, PG | 1:11 |
| 217.-224. The Bishop Strachan School | All-Girls | 7-12 | 1:12 |
| 217.-224. The Glenholme School | Co-Ed | 5-12, PG | 1:12 |
| 217.-224. Hyde-Woodstock | Co-Ed | 9-12, PG | 1:12 |
| 217.-224. Missouri Military Academy | All-Boys | 6-12, PG | 1:12 |
| 217.-224. Monte Vista Christian School | Co-Ed | 9-12 | 1:12 |
| 217.-224. New Mexico Military Institute | Co-Ed | 9-12, PG | 1:12 |
| 217.-224. New York Military Academy | Co-Ed | 7-12 | 1:12 |
| 217.-224. Tallulah Falls School | Co-Ed | 7-12 | 1:12 |
| 225. Florida Air Academy | Co-Ed | 6-12 | 1:13 |
| 226.-227. Army and Navy Academy | All-Boys | 7-12 | 1:14 |
| 226.-227. Carlisle School | Co-Ed | 9-12 | 1:14 |
| 228.-230. Bronte College of Canada | Co-Ed | 9-12, PG | 1:15 |
| 228.-230. EduKick Academic Soccer (Sports) Boarding School Academies | Co-Ed | 8-12, PG | 1:15 |
| 228.-230. The Linsly School | Co-Ed | 7-12 | 1:15 |
| 231.-232. Family First Academy | Co-Ed | 8-12 | 1:16 |
| 231.-232. Houghton Academy | Co-Ed | 9-12, PG | 1:16 |
| 233. Girard College | Co-Ed | 1-12 | 1:17 |
| 234.-235. The King's Academy | Co-Ed | 7-12 | 1:18 |
| 234.-235. St. Michaels University School | Co-Ed | 8-12 | 1:18 |
| 236.-237. Advanced Academy of Georgia | Co-Ed | 11-12 | 1:20 |
| 236.-237. Montverde Academy | Co-Ed | 7-12, PG | 1:20 |
• View all schools sorted by "teacher:student ratio"
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