By Sarah Caban, Director, PK–12 Learning Experiences and Dionne Aminata, Former Grade 2–5 Lead WriterWhen do students practice their math facts? How is math fluency assessed?We appreciate these questions for a couple of reasons: 1) We took great care in thinking...
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Free, High-Quality Math Curriculum and Support for California Classrooms
Feb 18, 2026
By the Illustrative Mathematics team California educators are navigating big shifts in math instruction, grounded in access, coherence, and deeper student understanding. California AccessIM was designed to meet this moment. Available to all educators at...
How IM® Math Supported a 24.8-Percentage-Point Math Gain in NYCPS District 11
Jan 6, 2026
By the Illustrative Mathematics team The gains in math achievement experienced by District 11 in New York City Public Schools (NYCPS) are not the result of a sudden shift or a one-year initiative. They reflect years of deliberate, system-level work focused on...
Reenvisioning Classroom Observations
Dec 17, 2025
Catherine Castillo, Sr. Specialist, Implementation Enablement Claire Neely, Sr. Specialist, Implementation Enablement “Both rigorous performance evaluation and frequent formative feedback are important building blocks for promoting a strong teacher workforce. Mounting...
Implementing a New Math Curriculum: 4 Tips You Won’t Find in a Textbook
Dec 9, 2025
By Meredith Dadigan Abel, IM Certified® Facilitator, K-5 Teachers are the heartbeat of any new math curriculum—they bring lessons to life, adapt to student needs, and make learning happen every day. But behind the scenes, administrators are the backbone, ensuring the...
Building a Math Community with IM K–5 Math
Sep 11, 2025
By Tabitha Eutsler, 3rd Grade Teacher “I’m not sure this is working. Only five of my students are participating and commenting each day. The rest sit there and look at me.” This was my conversation with our math coordinator after my first few days of teaching IM K–5...
Turning the Flywheel: The Next Chapter for Illustrative Mathematics
Aug 21, 2025
By Kristin Umland, IM CEO and Cofounder Twelve years ago, Illustrative Mathematics® (IM) was just a scrappy startup with very few resources, held together by five founders who shared a conviction that we could help educators across the United States elevate their math...
A Farewell and a Look Ahead
Jul 31, 2025
By Bill McCallum, IM Cofounder Every parent knows what it feels like to bring a being into existence with the hope they will one day stand on their own. It is one of the greatest joys to watch them grow, change, and eventually spread their wings. Nothing quite...
Celebrating Bill McCallum’s Accomplishments as CEO of Illustrative Mathematics®
Jul 24, 2025
Since 2011, Illustrative Mathematics (IM)—which has reached over three million students and educators—has been guided by the vision, expertise, and heart of our CEO and cofounder, Bill McCallum. Today, we are announcing a milestone for IM: At the end of this month,...
Unlocking the ‘Our’ in Discourse
May 28, 2025
Catherine Castillo, Sr. Implementation Specialist Brea Jimenez, Sr. Specialist, Facilitator Certification and Quality Assurance What do you notice about this NCTM framework for mathematics teaching? What do you wonder? You likely noticed that four of these teaching...
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