Fishburne Military School

Woodberry Forest School

Home > School Rankings

Smallest Average Class Size

The average class size across the 28 ranked all-boys boarding schools is 12 (2026-27).

Among all-boys boarding schools, the one with the smallest average class size is New Summit Academy Costa Rica, with 6.

Quick Facts (26-27)

# All-Boys Schools Ranked: 28
Top 20 Range (Smallest Average Class Size): 6–13
All-Boys Schools Avg.: 12
National Avg.: 13

Quick Facts (26-27)

# All-Boys Schools Ranked: 28
Top 20 Range (Smallest Average Class Size): 6–13
All-Boys Schools Avg.: 12
National Avg.: 13

National Average Class Size (Trends)

Showing 2016–2025. Full 12-year historical data available below ↓

Total Growth: +1.6% (+0.2 since 2016)

View Data

Year	National avg	YoY Change (#)	YoY Change (%)
2025	12.8	— 0	— 0.0%
2024	12.8	▲ +0.1	▲ +0.8%
2023	12.7	▲ +0.1	▲ +0.8%
2022	12.6	▲ +0.1	▲ +0.8%
2021	12.5	▲ +0.1	▲ +0.8%
2020	12.4	▼ -0.2	▼ -1.6%
2019	12.6	▼ -0.1	▼ -0.8%
2018	12.7	▲ +0.1	▲ +0.8%
2017	12.6	— 0	— 0.0%
2016	12.6	— 0	— 0.0%
2015	12.6	— 0	— 0.0%
2014	12.6	—	—

Download Table: Download as CSV | Download as XML | Download as JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Show school map — National (# Students range: 6–20, avg 12)

# Students Range: 6 20 Avg. # Students: 12

Frequently Asked Questions

Which all-boys boarding schools have the smallest average class size?

The all-boys boarding schools with the smallest average class size are New Summit Academy Costa Rica, Fishburne Military School and Woodberry Forest School.

How many all-boys boarding schools are ranked for the smallest average class size?

28 all-boys boarding schools are ranked for the smallest average class size.

Recent Articles

October 20, 2026

AI Isn’t the Problem: Teaching Students to Use It Well

Is AI in the classroom a shortcut or a stepping stone to deeper learning? Explore how teaching AI literacy rather than banning it - can build critical thinking, strengthen language skills, and preserve human connection in education.

October 19, 2026

What If Your Child's Boarding School Advisor Leaves?

Learn what happens when your child's boarding school advisor leaves midyear, including reassignment, academic support, parent communication, student relationships, and practical steps families can take to ensure continuity.

October 19, 2026

What Parents Are Told About Boarding School Dorm Incidents

Discover what boarding schools tell parents about dorm incidents, including bullying, injuries, disciplinary problems, notification policies, privacy protections, reporting timelines, and questions families should ask before choosing a residential school.

Featured Schools

Did You Know?

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.