Smallest Average Class Size

Among "All Schools," view the twenty boarding schools with the "smallest average class sizes." First, some important notes:

  • Keep in mind that small statistical differences in average class sizes between schools do not always indicate better student performance at one school or another.
  • Also keep in mind that boarding schools in general have smaller average class sizes than public schools - even for schools with larger class sizes, a "large" class in a boarding school would still often be considered small by public school standards which often have class sizes of 20+ students.

Smallest Average Class Sizes:

Among All Schools (out of 303 schools)

Sorted by range (alphabetically within range)
* Indicates Boarding Grades Offered
Boarding School
Type
Grades*
# Students
1.-5.  Fenster School Co-Ed 9-12, PG 4
1.-5.  The Gow School All-Boys 7-12, PG 4
1.-5.  The Greenwood School All-Boys 6-12 4
1.-5.  Hampshire Country School All-Boys 3-12 4
1.-5.  Linden Hill School All-Boys 8-9 4
6.-11.  Bachman Academy Co-Ed 6-12, PG 5
6.-11.  Brehm Preparatory School Co-Ed 6-12, PG 5
6.-11.  Eagle Hill School Co-Ed 8-12 5
6.-11.  Oakland School Co-Ed 9-12 5
6.-11. Valley International Academy Co-Ed 9-12, PG 5
6.-11. Wolfeboro: The Summer Boarding School Co-Ed 6-12, PG 5
12.-16. Brandon Hall School Co-Ed 6-12, PG 6
12.-16. The Leelanau School Co-Ed 9-12 6
12.-16. Middlebridge School Co-Ed 7-12, PG 6
12.-16. St. Andrew's Academy Co-Ed 6-12 6
12.-16. The Winchendon School Co-Ed 9-12, PG 6
17.-19. Ekklesia Mountain High Co-Ed 9-12 7
17.-19. Grand River Academy All-Boys 9-12, PG 7
17.-19. St. Margaret's School All-Girls 8-12 7
20.-35. Academy of the Holy Family All-Girls 9-12 8
Sorted by range (alphabetically within range)
* Indicates Boarding Grades Offered
Boarding School
Type
Grades*
# Students
20.-35. Carlbrook School Co-Ed 9-12, PG 8
20.-35. Chamberlain-Hunt Academy All-Boys 7-12 8
20.-35. Chatham Hall All-Girls 9-12 8
20.-35. Dublin School Co-Ed 9-12 8
20.-35. Ecole d’Humanité Co-Ed 9-12, PG 8
20.-35. The Forman School Co-Ed 9-12, PG 8
20.-35. Hoosac School Co-Ed 8-12, PG 8
20.-35. The Howe School and Summer Camp Co-Ed 7-12 8
20.-35. Hyde School - Woodstock, CT Co-Ed 9-12, PG 8
20.-35. The Kildonan School Co-Ed 7-12, PG 8
20.-35. Landmark School Co-Ed 9-12 8
20.-35. The Marvelwood School Co-Ed 9-12, PG 8
20.-35. Oldfields School All-Girls 8-12, PG 8
20.-35. Oliverian School Co-Ed 9-12, PG 8
20.-35. The Phelps School All-Boys 7-12, PG 8
36.-45. Blue Ridge School All-Boys 9-12 9
36.-45. Buxton School Co-Ed 9-12 9
36.-45. Darrow School Co-Ed 9-12 9
36.-45. Grier School All-Girls 7-12, PG 9
36.-45. Lustre Christian High School Co-Ed 9-12 9
36.-45. Northwood School Co-Ed 9-12, PG 9
36.-45. St. Timothy's School All-Girls 9-12, PG 9
36.-45. South Kent School All-Boys 9-12, PG 9
36.-45. Southwestern Academy Co-Ed 6-12, PG 9
36.-45. Squaw Valley Academy Co-Ed 9-12 9
46.-73. Besant Hill School (Formerly Happy Valley School) Co-Ed 9-12 10
46.-73. Bridgton Academy All-Boys 12-12, PG 10
46.-73. Cate School Co-Ed 9-12 10
46.-73. Chapel Hill-Chauncy Hall Co-Ed 9-12, PG 10
46.-73. Colorado Rocky Mountain School Co-Ed 9-12, PG 10
46.-73. Country Day School, Costa Rica Co-Ed 8-12 10
46.-73. Eaglebrook School All-Boys 6-9 10
46.-73. Fishburne Military School All-Boys 7-12, PG 10
46.-73. Holderness School Co-Ed 9-12, PG 10
46.-73. The Kiski School All-Boys 9-12, PG 10
46.-73. Massanutten Military Academy Co-Ed 7-12, PG 10
46.-73. Midland School Co-Ed 9-12 10
46.-73. Missouri Military Academy All-Boys 6-12, PG 10
46.-73. Oak Hill Academy Co-Ed 8-12 10
46.-73. Olney Friends School Co-Ed 9-12 10
46.-73. Purnell School All-Girls 9-12 10
46.-73. The Rectory School Co-Ed 5-9 10
46.-73. St. Andrew's School Co-Ed 9-12, PG 10
46.-73. Saint Mary's School All-Girls 9-12 10
46.-73. Scattergood Friends School Co-Ed 9-12, PG 10
46.-73. Stoneleigh-Burnham School All-Girls 7-12, PG 10
46.-73. Stuart Hall School Co-Ed 8-12, PG 10
46.-73. Suffield Academy Co-Ed 9-12, PG 10
46.-73. Venta Preparatory School Co-Ed K-10 10
46.-73. Virginia Episcopal School Co-Ed 9-12 10
46.-73. West Nottingham Academy Co-Ed 9-12, PG 10
46.-73. The White Mountain School Co-Ed 9-12, PG 10
46.-73. Woodberry Forest School All-Boys 9-12 10
74.-98. Blair Academy Co-Ed 9-12, PG 11
74.-98. Buffalo Seminary All-Girls 9-12 11
74.-98. Canterbury School Co-Ed 9-12, PG 11
74.-98. Fountain Valley School of Colorado Co-Ed 9-12 11
74.-98. Hargrave Military Academy All-Boys 7-12, PG 11
74.-98. Hillside School All-Boys 5-9 11
74.-98. Kents Hill School Co-Ed 9-12, PG 11
74.-98. The Knox School Co-Ed 7-12, PG 11
74.-98. The MacDuffie School Co-Ed 9-12, PG 11
74.-98. Miss Hall's School All-Girls 9-12 11
74.-98. Miss Porter's School All-Girls 9-12 11
74.-98. New Hampton School Co-Ed 9-12, PG 11
74.-98. Oakdale Christian Academy Co-Ed 7-12 11
74.-98. Pomfret School Co-Ed 9-12, PG 11
74.-98. St. Andrew's School, DE Co-Ed 9-12 11
74.-98. St. George's School Co-Ed 9-12 11
74.-98. Saint James School Co-Ed 8-12 11
74.-98. St. John's Northwestern Military Academy All-Boys 7-12, PG 11
74.-98. Salem Academy All-Girls 9-12 11
74.-98. Solebury School Co-Ed 9-12 11
74.-98. The Thacher School Co-Ed 9-12 11
74.-98. Tilton School Co-Ed 9-12, PG 11
74.-98. Verde Valley School Co-Ed 9-12 11
74.-98. Vermont Academy Co-Ed 9-12, PG 11
74.-98. Wentworth Military Academy & College Co-Ed 9-12, PG 11
99.-176. Andrews Osborne Academy Co-Ed 7-12 12
99.-176. Annie Wright School All-Girls 9-12 12
99.-176. Avon Old Farms School All-Boys 9-12, PG 12
99.-176. Bement School Co-Ed 3-9 12
99.-176. Berkshire School Co-Ed 9-12, PG 12
99.-176. Brewster Academy Co-Ed 9-12, PG 12
99.-176. Brooks School Co-Ed 9-12 12
99.-176. Camden Military Academy All-Boys 7-12, PG 12
99.-176. Cardigan Mountain School All-Boys 6-9 12
99.-176. CCI The Renaissance School Co-Ed 10-12, PG 12
99.-176. CFS, The School at Church Farm All-Boys 7-12 12
99.-176. Cheshire Academy Co-Ed 9-12, PG 12
99.-176. Choate Rosemary Hall Co-Ed 9-12, PG 12
99.-176. Christ School All-Boys 8-12 12
99.-176. Christchurch School Co-Ed 9-12 12
99.-176. Concord Academy Co-Ed 9-12 12
99.-176. Cushing Academy Co-Ed 9-12, PG 12
99.-176. Deerfield Academy Co-Ed 9-12, PG 12
99.-176. Episcopal High School Co-Ed 9-12 12
99.-176. Erie First Christian Academy Co-Ed 8-12, PG 12
99.-176. The Ethel Walker School All-Girls 9-12, PG 12
99.-176. Fay School Co-Ed 6-9 12
99.-176. Foxcroft School All-Girls 9-12, PG 12
99.-176. Gould Academy Co-Ed 9-12, PG 12
99.-176. The Governor's Academy
(formerly Governor Dummer Academy)
Co-Ed 9-12 12
99.-176. The Gunnery Co-Ed 9-12, PG 12
99.-176. Hawai'i Preparatory Academy Co-Ed 6-12, PG 12
99.-176. Hebron Academy Co-Ed 9-12, PG 12
99.-176. High Mowing School Co-Ed 9-12 12
99.-176. Hill School Co-Ed 9-12, PG 12
99.-176. The Hotchkiss School Co-Ed 9-12, PG 12
99.-176. Hyde School - Bath, ME Co-Ed 9-12, PG 12
99.-176. Kent School Co-Ed 9-12, PG 12
99.-176. Kimball Union Academy Co-Ed 9-12, PG 12
99.-176. La Lumiere School Co-Ed 9-12, PG 12
99.-176. Lake Forest Academy Co-Ed 9-12, PG 12
99.-176. Lawrenceville School Co-Ed 9-12, PG 12
99.-176. Linden Hall All-Girls 5-12, PG 12
99.-176. The Loomis Chaffee School Co-Ed 9-12, PG 12
99.-176. The Madeira School All-Girls 9-12 12
99.-176. Menaul School Co-Ed 9-12 12
99.-176. Mercersburg Academy Co-Ed 9-12, PG 12
99.-176. Middlesex School Co-Ed 9-12 12
99.-176. Miller School of Albemarle Co-Ed 8-12, PG 12
99.-176. New York Military Academy Co-Ed 7-12 12
99.-176. North Country School Co-Ed 4-9 12
99.-176. Northfield Mount Hermon School Co-Ed 9-12, PG 12
99.-176. Oakwood Friends School Co-Ed 9-12 12
99.-176. Ojai Valley School Co-Ed 3-12 12
99.-176. The Orme School of Arizona Co-Ed 8-12, PG 12
99.-176. Peddie School Co-Ed 9-12, PG 12
99.-176. Phillips Exeter Academy Co-Ed 9-12, PG 12
99.-176. Portsmouth Abbey School Co-Ed 9-12 12
99.-176. Proctor Academy Co-Ed 9-12, PG 12
99.-176. The Putney School Co-Ed 9-12, PG 12
99.-176. Rosseau Lake College Co-Ed 7-12, PG 12
99.-176. St. Johnsbury Academy Co-Ed 9-12, PG 12
99.-176. St. John's Military School All-Boys 5-12 12
99.-176. St. Mark's School Co-Ed 9-12 12
99.-176. St. Paul's School Co-Ed 9-12 12
99.-176. St. Thomas More School All-Boys 8-12, PG 12
99.-176. Salisbury School All-Boys 9-12, PG 12
99.-176. San Domenico School All-Girls 9-12 12
99.-176. San Marcos Baptist Academy Co-Ed 7-12 12
99.-176. Santa Catalina School All-Girls 9-12 12
99.-176. Shattuck-St. Mary's School Co-Ed 6-12, PG 12
99.-176. Stanstead College Co-Ed 7-12 12
99.-176. The Storm King School Co-Ed 8-12, PG 12
99.-176. Subiaco Academy All-Boys 7-12 12
99.-176. Tabor Academy Co-Ed 9-12 12
99.-176. The Taft School Co-Ed 9-12, PG 12
99.-176. TMI -The Episcopal School of Texas Co-Ed 8-12 12
99.-176. Valley Forge Military Academy All-Boys 7-12, PG 12
99.-176. The Webb School Co-Ed 7-12, PG 12
99.-176. Western Reserve Academy Co-Ed 9-12, PG 12
99.-176. Westminster School Co-Ed 9-12, PG 12
99.-176. Westover School All-Girls 9-12 12
99.-176. Woodside Priory School (Priory) Co-Ed 9-12 12
177.-192. Asheville School Co-Ed 9-12 13
177.-192. Dana Hall School All-Girls 9-12 13
177.-192. Emma Willard School All-Girls 9-12, PG 13
177.-192. Groton School Co-Ed 8-12 13
177.-192. The Hun School of Princeton Co-Ed 9-12, PG 13
177.-192. Leysin American School in Switzerland (LAS) Co-Ed 8-12, PG 13
177.-192. The Pennington School Co-Ed 7-12 13
177.-192. Phillips Academy Andover Co-Ed 9-12, PG 13
177.-192. St. Albans School All-Boys 9-12 13
177.-192. St. Anne's-Belfield School Co-Ed 9-12 13
177.-192. St. Stephen's School Co-Ed 9-12, PG 13
177.-192. THINK Global School Co-Ed 9-12 13
177.-192. Trinity Pawling School All-Boys 9-12, PG 13
177.-192. Wasatch Academy Co-Ed 8-12, PG 13
177.-192. Wayland Academy Co-Ed 9-12 13
177.-192. The Williston Northampton School Co-Ed 9-12, PG 13
193.-219. Baylor School Co-Ed 9-12 14
193.-219. The Cambridge School of Weston Co-Ed 9-12, PG 14
193.-219. Culver Academies Co-Ed 9-12 14
193.-219. Darlington School Co-Ed 9-12, PG 14
193.-219. Garrison Forest School All-Girls 8-12 14
193.-219. George School Co-Ed 9-12 14
193.-219. The Hockaday School All-Girls 8-12 14
193.-219. Idyllwild Arts Academy Co-Ed 9-12, PG 14
193.-219. Indian Springs School Co-Ed 8-12 14
193.-219. Lawrence Academy Co-Ed 9-12 14
193.-219. The Linsly School Co-Ed 7-12 14
193.-219. The Masters School Co-Ed 9-12 14
193.-219. McCallie School All-Boys 9-12 14
193.-219. Millbrook School Co-Ed 9-12, PG 14
193.-219. Milton Academy Co-Ed 9-12 14
193.-219. Oak Grove School Co-Ed 7-12 14
193.-219. Oregon Episcopal School Co-Ed 9-12 14
193.-219. The Perkiomen School Co-Ed 6-12, PG 14
193.-219. Randolph-Macon Academy Co-Ed 6-12, PG 14
193.-219. Riverside Military Academy All-Boys 7-12 14
193.-219. Rumsey Hall School Co-Ed 6-9 14
193.-219. Saint Andrew's School Co-Ed 9-12 14
193.-219. St. Andrew's-Sewanee School Co-Ed 9-12 14
193.-219. Stevenson School Co-Ed 9-12 14
193.-219. The Stony Brook School Co-Ed 7-12 14
193.-219. Wilbraham & Monson Academy Co-Ed 9-12, PG 14
193.-219. Wyoming Seminary Upper School Co-Ed 9-12, PG 14
220.-242. The Athenian School Co-Ed 9-12 15
220.-242. The Bolles School Co-Ed 7-12, PG 15
220.-242. Dunn School Co-Ed 9-12 15
220.-242. EF International Academy Co-Ed 9-12 15
220.-242. Florida Air Academy Co-Ed 6-12 15
220.-242. Fork Union Military Academy All-Boys 6-12, PG 15
220.-242. Fryeburg Academy Co-Ed 9-12, PG 15
220.-242. George Stevens Academy Co-Ed 9-12 15
220.-242. Interlochen Arts Academy Co-Ed 9-12, PG 15
220.-242. Lyndon Institute Co-Ed 9-12, PG 15
220.-242. New Mexico Military Institute Co-Ed 9-12, PG 15
220.-242. North Broward Preparatory School Co-Ed 6-12 15
220.-242. Robinson School Co-Ed 7-12 15
220.-242. Ross School Co-Ed 7-12, PG 15
220.-242. St. Catherine's Academy All-Boys 4-8 15
220.-242. Sandy Spring Fiends School Co-Ed 9-12 15
220.-242. Shawnigan Lake School Co-Ed 8-12 15
220.-242. Tallulah Falls School Co-Ed 7-12 15
220.-242. TASIS The American School in England Co-Ed 9-12, PG 15
220.-242. Thomas Jefferson School Co-Ed 7-12, PG 15
220.-242. The Webb Schools Co-Ed 9-12 15
220.-242. Western Mennonite School Co-Ed 9-12 15
220.-242. Westtown School Co-Ed 9-12 15
243.-281. Admiral Farragut Academy Co-Ed 6-12 >15
243.-281. Army and Navy Academy All-Boys 7-12 >15
243.-281. Brentwood College School Co-Ed 9-12, PG >15
243.-281. Bronte College of Canada Co-Ed 9-12 >15
243.-281. Cranbrook Schools Co-Ed 9-12 >15
243.-281. Foxcroft Academy Co-Ed 9-12 >15
243.-281. Georgetown Preparatory School All-Boys 9-12 >15
243.-281. Houghton Academy Co-Ed 9-12, PG >15
243.-281. Rabun Gap-Nacoochee School Co-Ed 7-12 >15
243.-281. Rothesay Netherwood School Co-Ed 6-12 >15
243.-281. Saint John's Preparatory School Co-Ed 9-12, PG >15
243.-281. St. Stephen's Episcopal School Co-Ed 8-12 >15
243.-281. Villanova Preparatory School Co-Ed 9-12 >15
243.-281. Washington Academy Co-Ed 9-12, PG >15
243.-281. Ashbury College Co-Ed 9-12 >15
243.-281. Delphian School Co-Ed 3-12 >15
243.-281. Maur Hill - Mount Academy (MH-MA) Co-Ed 8-12 >15
243.-281. Monte Vista Christian School Co-Ed 9-12 >15
243.-281. Ridley College Co-Ed Pre-K-12, PG >15
243.-281. St. Andrew's College All-Boys 6-12 >15
243.-281. The Brook Hill School Co-Ed 8-12 >15
243.-281. Cotter Schools Co-Ed 9-12, PG >15
243.-281. Donahue Academy of Ave Maria Co-Ed 9-12 >15
243.-281. Flintridge Sacred Heart Academy All-Girls 9-12 >15
243.-281. Havergal College All-Girls 9-12 >15
243.-281. The King's Academy Co-Ed 7-12 >15
243.-281. Montverde Academy Co-Ed 7-12, PG >15
243.-281. St. Mary's School Co-Ed 9-12 >15
243.-281. St. Michaels University School Co-Ed 8-12 >15
243.-281. Woodstock Academy Co-Ed 9-12, PG >15
243.-281. The Bishop Strachan School All-Girls 7-12 >15
243.-281. Columbia International College Co-Ed 7-12, PG >15
243.-281. St. Francis High School All-Boys 9-12 >15
243.-281. St. John's-Ravenscourt School Co-Ed 8-12 >15
243.-281. St. Stanislaus College-Prep All-Boys 7-12, PG >15
243.-281. UWC South East Asia East Co-Ed 7-12 >15
243.-281. St. Croix Schools Co-Ed 6-12 >15
243.-281. Mercyhurst Preparatory School Co-Ed 9-12 >15
243.-281. Advanced Academy of Georgia Co-Ed 11-12 >15

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