Compensation 990

Illustrative Mathematics

Fiscal year ending 2024. Filed on November 6, 2025.

PO Box 69822
Oro Valley, Arizona 85737

Illustrative Mathematics (EIN: 46-3513958) has filed an IRS Form 990 since at least fiscal year 2016. In its fiscal year 2024 IRS Form 990 filing, Illustrative Mathematics, a 501(c)(3) charitable organization, reported compensation for 13 out of 107 total employees. Among the employees shown here, the average compensation is $250,209. The highest compensated employee at Illustrative Mathematics is William McCallum with fiscal year 2024 compensation of $410,174.

Revenue, expenses, and employee compensation

Revenue

$18,776,208

Expenses

$20,557,940

Employee compensation

$13,842,734
Revenue, expenses, and employee compensation over time

Reported Compensated Employees

＋3.4%vs 2023
William McCallum
Chief Executive Officer
$410,174
$378,329 from orgNo related comp$31,845 other
＋3.5%vs 2023
Kristin Umland
President
$358,250
$318,459 from orgNo related comp$39,791 other
＋3.3%vs 2023
Kristen Welch
Chief Financial Officer
$319,118
$290,557 from orgNo related comp$28,561 other
New in 2024
Dylan Dechant- Vp of
Engineering and Innovation
$268,975
$234,459 from orgNo related comp$34,516 other
＋15.3%vs 2023
Gail Hartman - Sr Vp
Product Development
$264,330
$244,957 from orgNo related comp$19,373 other
New in 2024
Brandi Tyler- Vp of
Brand and Communications
$230,590
$193,391 from orgNo related comp$37,199 other
New in 2024
Latoya Byrd- Vp of
Client and Partner Success
$218,627
$185,594 from orgNo related comp$33,033 other
＋11.1%vs 2023
Elizabeth Ramirez - Vp of
Implementation Programs
$213,764
$197,891 from orgNo related comp$15,873 other
New in 2024
Aurora Ziobrowski
Engineering Director
$206,833
$191,006 from orgNo related comp$15,827 other
New in 2024
Tamara Richards- Associate Vp
Business Solutions Adminstration
$204,454
$178,150 from orgNo related comp$26,304 other
＋8.9%vs 2022
Windy Hamilton- Senior Director
Revenue Operations and Reporting
$199,727
$171,890 from orgNo related comp$27,837 other
＋3.1%vs 2023
Eric Connally
Principal Software Engineer
$181,897
$175,408 from orgNo related comp$6,489 other

Non-Employee Board Members

Barbara Chow
Director
Denise Walston
Director
George Zettler
Treasurer and Secretary
Heather Hill
Director
Lisa Carmona
Director
Rhett Dornback-Bender
Director
Sara Allen
Director

Mission Statement

AT ILLUSTRATIVE MATHEMATICS WE ARE COMMITTED TO CREATING A WORLD WHERE ALL LEARNERS KNOW, USE, AND ENJOY MATHEMATICS. WE CRAFT AND DELIVER HIGH-QUALITY EDUCATIONAL RESOURCES FOR TEACHERS AND STUDENTS BY DEVELOPING GREAT PEOPLE WHO WORK IN SPIRITED (CONTINUED ON SCH O) TEAMS TO DO EXTRAORDINARY THINGS.

Revisions to this organization profile

November 6, 2025:
2024 Illustrative Mathematics 990 filed
October 7, 2024:
2023 Illustrative Mathematics 990 filed
October 31, 2023:
2022 Illustrative Mathematics 990 filed

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