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About Us

About Illustrative Mathematics

Get to know IM’s history, mission, and team

Illustrative Mathematics is a non-profit organization committed to creating a world where learners know, use, and enjoy mathematics.

Our highly respected authors craft and deliver high-quality, problem-based core curricula and professional learning resources that help teachers and students excel in teaching and learning mathematics.


The IM Story

Founded in 2011 at the University of Arizona, Illustrative Mathematics is guided and inspired by educators who work in spirited teams to do extraordinary things.

The result is a comprehensive suite of math curricula, designed to encourage engaging mathematical discussion, supported by tasks, lesson plans, and professional learning.

IM 6–8 Math™ v. III  and IM 9–12 Math™ v. I certified by Illustrative Mathematics are available as open educational resources (OER) and free to access by anyone. To be assured that you are accessing the most current versions authored by IM, we created an IM Certified designation that highlights the organizations with whom we have an ongoing partnership. Additionally, the aligned IM Certified Professional Learning is designed to be interactive and engaging to ensure the immersive experience and best practices needed to seamlessly implement the curricula in your classrooms.


First Partnership Leads to Continued Growth

Open Up Resources 6–8 Math 2.0 was authored by Illustrative Mathematics.  Illustrative Mathematics, authored, reviewed and approved all of the content contained in Open Up Resources 6-8 Math 2.0.  OUR 6–8 Math 2.0 is a high-quality curriculum, and Illustrative Mathematics is proud of its collaboration with Open Up Resources, which brought one of the first full-course OER middle school math curriculum to students and teachers across the country.  Please contact OUR for more information about their version of an IM-authored curriculum.


Our Mission

Our mission is to create a world where learners know, use, and enjoy mathematics through curriculum development, professional learning, and administrative guidance.

We collaborate with and provide guidance to states, districts, curriculum writers, and assessment writers to help improve mathematics education.


A Non-Profit Organization

Illustrative Mathematics has operated as an independent 501(c)3 non-profit organization since 2013. We appreciate the generous support of our Philanthropic Supporters:

  • The Bill & Melinda Gates Foundation
  • Carnegie Corporation of New York
  • Chan Zuckerberg Institute
  • Charles and Lynn Schusterman Family Foundation
  • The William and Flora Hewlett Foundation
  • W.K. Kellogg Foundation

Board of Directors

Lisa Carmona

As the President of Zaner-Bloser, a Highlights company, Lisa Carmona is active in professional communities related to educational research, literacy, and digital learning, including the Westerville Library Foundation Board and NSF research grant advisory boards. 

A high-energy leader with more than two decades of success in educational publishing and technology, she has served in senior leadership roles at McGraw-Hill Education, Frank Schaffer Publications, and School Zone Publishing. 

Lisa holds an MBA from Ohio University and a BA from Central Michigan University.


Barbara Chow

Barbara Chow serves as the director of the Education program at the Heising-Simons Foundation.  

Her early years of service were spent working with the Clinton administration, where she was deputy director of the Domestic Policy Council; associate director for Education, Income Maintenance, and Labor programs at the Office of Management and Budget; special assistant to the president for White House Legislative Affairs; and worked with the Senate Democratic Policy Committee and the Senate Budget Committee.

Chow then went on to serve as policy director of the House Budget Committee and the executive director of the National Geographic Education Foundation.

She spent the next eight years as the director of the education program for the William and Flora Hewlett Foundation.

Chow holds a master’s degree in public policy from the University of California, Berkeley, and a bachelor’s degree in government from Pomona College.


Heather Hill

Heather Hill studies policies and programs designed to improve mathematics teacher and teaching quality at the Harvard Graduate School of Education. 

Her recent research focuses on teacher professional development, instructional coaching, teacher evaluation, changes over time in teachers’ mathematical knowledge and instructional quality in mathematics, and teacher experiences and characteristics that lead to high-quality instruction and stronger student outcomes. 

Hill and her team have developed assessments that capture teachers’ mathematical knowledge for teaching and teachers’ mathematical quality of instruction, assessments now widely available to researchers, instructional coaches, evaluators, and policy-makers via online training and administrative systems

Hill is a fellow of the American Educational Research Association (AERA), and serves on the AERA grants board, on the editorial boards of several journals, and as an advisor to numerous research projects and policy efforts in both the U.S. and abroad. She is co-author of Learning Policy: When State Education Reform Works with David K. Cohen (Yale University Press, 2001).

Heather holds a PhD from the University of Michigan and a BA from Swarthmore College.


Gregg Levin

Gregg Levin is President and Chief Operating Officer of K12 Insight.

A management executive with over 20 years experience in sales, marketing, product development, government relations, and operations, he has served in senior leadership roles at Fuel Education (a division of K12, Inc), KC Distance Learning, Sylvan Learning, and Bright Horizons where he specialized in creating strategies to hone the mission, grow the client base, and scale the business.

He holds an MBA from the University of Maryland and a BS from the University of Rochester.


William G. McCallumWilliam G. McCallum

Bill McCallum has dedicated his life to helping teachers, educators, mathematicians, and policymakers show fidelity to both mathematical coherence and student learning.

He is an Emeritus Distinguished Professor of Mathematics at The University of Arizona, where he researches number theory and arithmetical algebraic geometry, authors textbooks, and advises researchers and policymakers. Bill’s work as a lead writer of the Common Core State Standards in Mathematics earned him the Distinguished Public Service Award from the American Mathematical Society and the Dolciani Award from the Mathematical Association of America.

As President, co-founder, and interim CEO of Illustrative Mathematics, he chairs the Board of Directors where he helps craft the strategic direction of the organization and contributes to the curricula; he also represents IM to funders, at speaking events, and in workshops.


Cynthia Nava

Cynthia Nava is the Executive Director of Teach for America, New Mexico.

Cynthia’s goal has always been to put the student first, and her belief is that all students can meet the highest academic standards in K–12.

Her career in education began in Galesburg, Illinois where she taught the severely emotionally disturbed. She then went on to become the Superintendent of the Gadsden Independent School District in Southern New Mexico.

She served as a New Mexico State Senator from 1993 thru 2012, where she spent 16 years as Chair of the Senate Education Committee and as a member of the National Assessment Governing Board, appointed by Education Secretary Margaret Spellings.

She holds a BA from Western Illinois University, a MA from Eastern Illinois University and a PhD from New Mexico State University in Educational Leadership/Curriculum.


Lisa O’Masta

As President for Learning A-Z, A Cambium Learning company, Lisa brings her passion for education and meaningful student outcomes to everything she does.

Prior to Learning A-Z, Lisa served as the CEO for Illustrative Mathematics where she pioneered the broad distribution and scale of open educational resources and professional learning.  Additionally, she has held leadership positions at K12, Inc., McGraw-Hill Education, SchoolNet, eInstruction, and Laureate International Universities. In these roles, she delivered improved customer outcomes, aggressive growth, and operational efficiencies to product management, operations, instruction, curriculum development, sales and marketing.

Lisa is a seasoned executive in education with more than 20 years experience pushing boundaries, recruiting and developing talented, diverse teams, and delivering measurable positive impacts in districts across the country.  She holds an MBA from Johns Hopkins University and a BS from Towson University.


Dominick Sekich

Dominick Sekich, partner and attorney at Moye White LLP, provides strategic counsel in complex real estate, corporate, information technology, and regulatory matters. He advises companies concerning business planning and formation, contracts, strategic negotiations, and vendor relationships, as well as intellectual property licensing and use agreements. Dominick’s experience also includes negotiating complex information technology service agreements, licenses, trade arrangements, and technology-related contracts. Through strategic guidance, he seeks to promote best corporate practices and healthy relationships that positively impact his clients’ business initiatives. He received his BA from The Colorado College, his MS from the London School of Economics and Political Science, and his JD from Georgetown University.


Denise Walston

Denise M. Walston is the Director of Mathematics for the Council of the Great City Schools. 

Prior to that, she served as Senior Coordinator of K–12 Mathematics at Norfolk Public Schools (NPS), where she embarked on an Algebra For ALL initiative which resulted in more than 50 percent of students completing algebra by the end of grade eight while simultaneously improving student achievement and closing achievement gaps in mathematics.

Recently, she served on a panel to study the alignment of NAEP items to the Common Core State Standards for Mathematics. Additionally, Denise has served as an adjunct instructor for The University of Virginia and Old Dominion University, Vice-President of National Council of Supervisors of Mathematics, President of the Virginia Council for Mathematics Supervision, President of the Beta Beta chapter of Delta Kappa Gamma (a professional honorary society of women educators), and as a board member of both the Virginia Mathematics and Science Coalition and the Benjamin Banneker Association.

Denise received her BA from The University of North Carolina at Greensboro her MSEd in from Old Dominion University, and has completed additional study at the Woodrow Wilson Institute at Princeton University, George Washington University, and the College of William and Mary.


George Zettler

George Zettler is a mathematician and financial manager. He is co-founder and managing member of Flowing Shape Advisers, LLC, a consulting group specializing in mathematical analysis.

Prior to Flowing Shape, Zettler co-founded Ellington Management Group LLC and held a position at Kidder Peabody.

He also served as Professor of Mathematics at Columbia University for nine years, where he conducted original research in representation theory and algebraic geometry.

He holds a PhD and an AB in Mathematics from the University of Maryland and Harvard University.


Advisory Board

Diane J. Briars

As a mathematics education consultant and Chair of the Conference Board of the Mathematical Sciences, Diane works to increase math knowledge around the world. She’s also Chair of the Conference Board of the Mathematical Sciences and was formerly president of the National Council of Teachers of Mathematics and the National Council of Supervisors of Mathematics. Diane was a senior developer/research associate on the NSF-funded Intensified Algebra Project and Mathematics Director for Pittsburgh Public Schools. She holds a Ph.D. in Mathematics Education, M.S. and B.S. in Mathematics from Northwestern University, and did postdoctoral study in the Psychology Department of Carnegie-Mellon University.


Diana Cano

An accomplished IT leader supporting educational non-profits, Diana is the Executive Director, IT at Educational Testing Service where she directly enables the Research and Assessment Development division and Scoring Operations. She also holds three US patents for innovations in assessment. Currently, Diana teaches at The College of New Jersey in the Mechanical Engineering department, drawing from her doctoral dissertation research on the institutional adoption of innovation.


Phil Daro

Before bringing his mathematical insights to IM, Phil was a lead writer for Common Core State Standards for Mathematics. His educational background includes being Director of Mathematics for the Strategic Education Research Partnership (SERP) and the design lead for a tablet-based K–12 mathematics curriculum to be published by Pearson. He won the 2012 Walter Denham Award and 2014 Ross Taylor/Glenn Gilbert National Leadership Award. Currently, Phil serves on the Board of SERP and of Shell Centre Publications at the University of Nottingham, is a Member of the NAEP Validity Studies Panel, and is on the Advisory Board for the Algebra for All initiative in NYC schools.


John Ewing

Understanding the critical need to support math educators, John is President of Math for America, which is committed to encouraging extraordinary teachers to stay in the classroom. Before that he was Executive Director of the American Mathematical Society for nearly 14 years and a mathematics professor at Indiana University, where he was also Department Chair for two terms. He has held visiting positions at Dartmouth College, the University of Virginia, Newcastle University, and Göttingen University. He holds a Ph.D. from Brown University and B.S. from St. Lawrence University, which also awarded him an honorary degree in 1996.


Jean Foster

Currently Senior Vice President, Marketing and Communications at the Consumer Technology Association, Jean has over 20 years’ experience in technology and has held leadership positions with product and profit-and-loss responsibility at companies such as BT, GE, Neustar, and Verisign. She is also a member of the Board of Directors for Signature Theatre in Arlington, Virginia. She has studied at the London Business School and the British Chartered Institute of Marketing, and holds a B.A. from Glasgow Caledonian University. 


Nicole Neal

Co-founder of Noodle Markets, Nicole has explored all corners of the edtech market. Her company brings vendors and educators together to increase efficiency and transparency in K–12 purchasing. Previously, she was President of CORE Education Consulting and Solutions and held several senior leadership positions at Pearson Education and Schoolnet, managing formative assessment, intervention, and content solutions. Nicole started coding when she was 11 years old. When she’s not working, she finds great joy in encouraging other young girls to code and to be the best that they can be.


Jason Zimba

With a deep background in science and math research, Jason is a Founding Partner of Student Achievement Partners and was a lead writer of the Common Core State Standards for Mathematics. His academic awards include a Rhodes scholarship and a Majorana Prize for theoretical physics. Jason has taught physics and mathematics to university students and high school students, adult prison inmates, and members of other disadvantaged groups. He holds a B.A. from Williams College with a double major in mathematics and astrophysics, an M.Sc. by research in mathematics from Oxford, and a Ph.D. in mathematical physics from the UC Berkeley.


Dave Zura

Dave is the President of Allsup LLC, the nation’s largest Social Security Disability Insurance representation company providing benefits and services to disabled people. As a parent and advocate for education, Dave is aligned to IM’s mission to help all students learn mathematics. He began his career in strategy roles with Bain & Company, PepsiCo, and Edison Brothers Stores and spent 10 years with Capital One. Most recently, Dave served as President of Professional Warranty. He holds an M.B.A. from Harvard University and a B.S. from the Commerce School at the University of Virginia.


Leadership Team

William G. McCallum

William G. McCallum
President and Interim CEO

Bill McCallum has dedicated his life to helping teachers, educators, mathematicians, and policymakers show fidelity to both mathematical coherence and student learning.

He is an Emeritus Distinguished Professor of Mathematics at The University of Arizona, where he researches number theory and arithmetical algebraic geometry, authors textbooks, and advises researchers and policymakers. Bill’s work as a lead writer of the Common Core State Standards in Mathematics earned him the Distinguished Public Service Award from the American Mathematical Society and the Dolciani Award from the Mathematical Association of America.

As President, co-founder, and interim CEO of Illustrative Mathematics, he chairs the Board of Directors where he helps craft the strategic direction of the organization and contributes to the curricula; he also represents IM to funders, at speaking events, and in workshops.


Kristin Umland

Kristin Umland
Chief Product Officer

Kristin believes that all children can learn and enjoy mathematics, and that by coordinating the expertise of teachers, mathematicians, math education researchers, and business professionals, we can help students realize their mathematical potential.

Before joining the IM team, she was an Associate Professor in the Department of Mathematics and Statistics at the University of New Mexico (UNM). After joining UNM with a Ph.D. in Mathematics, she carried out research in mathematics education, taught pre-service and in-service elementary and secondary teachers, and conducted education outreach at the local, state, and national level. A recipient of both the Louise Hay Award and the AMS Impact Award, Kristin’s goal has always been to improve the mathematical and pedagogical quality of children’s learning experiences.

A co-founder of IM, she now serves as VP for Content Development and oversees the development of curriculum and professional learning.


Kristen (Kris) Welch
Chief Financial Officer and Vice President of Finance and Administration

Kris has a deeply rooted passion and appreciation for high-quality education and learning, and a relentless commitment to listen to partners and customers while constantly innovating to meet the evolving needs of the classroom.

At Discovery, she served as CFO for both Discovery Channel and Science Channel; and as Senior Vice President, Global Content Operations, she was responsible for producing and broadcasting programs across 32 networks and 220 countries. In 2013 she was honored with a “Women Leading Women” award from the University of Maryland; in 2011 she was named a “Person to Watch” by The Financial Manager, the magazine of the Media Financial Management Association.

As CFO and VP Enterprise Management for IM, Kris oversees finance, accounting, project management, legal, human resources, and administration. She believes that IM’s impact and success are dependent on its ability to support and leverage its own diverse talent and expertise.


Karl Nelson

Karl Nelson
Chief Information Officer

Throughout his career, Karl has been devoted to delivering high-quality educational materials to students, teachers, and districts across the country.

Prior to joining IM, he served as COO for Open Up Resources where he directed product development and new technology implementations. As Director of Digital Learning for the Office of the Superintendent of Public Instruction in Washington state, he created Washington’s K–12 OER project and served as the state lead for the K–12 OER Collaborative, a multi-state effort to develop open educational resources. He was also lead policy maker for digital education, developing and implementing online systems and providing technical support to districts.

Now the Chief Information Officer for IM, he is responsible for the organization’s engineering, systems, and evaluation work.


Trisha Thomas

Trisha Thomas
Chief Customer Officer

Trisha’s passion for K-12 education has driven her 20-year career working for organizations dedicated to helping learners succeed by delivering quality content and instructional resources to classrooms.

Before joining IM she served as Chief Marketing Officer for Evan-Moor Educational Publishers, Director at eInstruction, and Manager at Discovery Education. Her marketing leadership earned her a Daytime Emmy Award and a Rising Star Marketing Award.

She now serves as IM’s Chief Customer Officer where she is responsible for defining, measuring, and delivering a world-class experience for users, clients, facilitators, and partners. As a parent and advocate for K-12 education, Trisha values the importance of quality mathematics content and instruction in the classroom and is excited to be a part of IM’s mission to create a world where learners know, use, and enjoy mathematics.