This edition examines Annual Giving as a % of Total Expense (2019–2025)—a key indicator of how much schools rely on philanthropy to fund operations and how exposed they are to shifts in donor behavior and economic conditions.

This year’s INDEX admissions data reflects a subtle shift in funnel dynamics. While early indicators suggest modest demand tightening, enrollment outcomes remain stable, supported by improved yield and stable attrition.

Teacher graduate degrees, energy costs, advanced coursework, board participation in capital campaign, and thank you letters.

77% of Upper School Students Participate in Sports Upper School students’ participation in interscholastic sports has remained constant at 77% since INDEX started collecting data

Teacher Attrition Drops to 9.8% INDEX teacher attrition fell to 9.8% in 2024-25, down 21% from the Covid peak and among the lowest rates in

This month’s Notable Numbers includes highlights from the 2025 INDEX Data Trends Report delivered at the October HOS/CFO Conferences. Revenue Growth Outpaces Expense Growth Since

The following Notable Numbers are taken from recent member surveys submitted through the INDEX portal. Endowment Draws (62 schools responding) Head of School Reporting (51

Pros and cons of remote/hybrid work as reported by INDEX Schools.

Insights from the June 2025 INDEX College Counseling SurveyEighty-eight INDEX schools participated in the latest INDEX College Counseling Survey. Each school received a customized benchmark

The data below are some of the findings from a broad survey – the INDEX Admissions Pulse Survey (May 2025) – in which 126 INDEX

The data below represent average percent changes in key metrics from INDEX schools during the period 2006/07 to 2009/10, capturing shifts that occurred during the Financial Crisis. While today’s environment

The following 6-year trends include the same schools throughout. For a detailed comparison of your school’s performance, please refer to the Admissions section of your INDEX Annual

Seven years of school-reported (non-standardized) full-time equivalent (FTE) data.

Annual fund “ask,” exit interviews, institutional researchers, weighted GPAs, and student feedback for teachers.

Staffing Trends at INDEX Schools (Last 5 Years)