Illustrative Mathematics It was great to see so many of you at NCSM and NCTM in San Diego. If we missed you, or you weren’t able to attend, read our NCSM and NCTM round-up below. We enjoyed the conversations we had with those of you that are using the IM 6–8 Math...
6–8 Math
What is a Measurable Attribute?
Apr 8, 2019
By Kristin Umland,VP Content Development A great conversation I had with the IM elementary school curriculum writing team got me thinking: What is a measurable attribute? That is, when given an object, what can we measure about it? Before you jump in with your own...
Representing Subtraction of Signed Numbers: Can You Spot the Difference?
Mar 2, 2019
By Greta Anderson & Patti Drawdy, IM Certified Facilitator I read the lesson three times through, but was still unsure why the number line below shows $3 - 7$. My aha moment arrived courtesy of the grade 1 standards. Greta: Over the course of this past year,...
Planning Lessons for a Block Schedule
Feb 28, 2019
By Jennifer Wilson and Vanessa Cerrahoglu Update 2021 - August: IM has created block schedule guidance for IM 6-8 Math v.III and IM 9-12 Math v.I. Get unit guidance on how to customize the curriculum to fit your block schedule in the IM Community Hub. IM 6–8 Math...
What is Problem-based Instruction?
Feb 19, 2019
By William McCallum When I was a child, I used to get puzzle books out of the library. One of the puzzles was the twelve-coin problem, the most difficult of all coin weighing problems. My mother and I worked on it separately at the same time, and she solved it first....
Realizing the promise of open resources
Jan 25, 2019
By William McCallum All of our curriculum here at Illustrative Mathematics is released under a Creative Commons Attribution (CC-BY) license, which allows anyone to "copy and redistribute the material in any medium or format" and to "remix, transform, and build upon...
What is the Time? It Depends…
Dec 18, 2018
Q: What is the fastest way to get a heated debate going about some topic in the IM 6–-8 math curriculum? A: Show people this graph from Lesson 4 in Unit 8.5: By Kristin Umland Many of us learned that time is always the independent variable, and should therefore always...
The Power of Noticing and Wondering
Dec 3, 2018
My first years of teaching, I worried my students looked at me much like Ben Stein as the teacher in Ferris Bueller’s Day Off. I cringe to think about the series of monotonous and leading questions I strung together to a room of dazed students slowly wilting in front...
Why is 3 – 5 = 3 + (-5)?
Oct 31, 2018
By William McCallum You will never have to subtract again. Students sometimes learn about addition and subtraction of integers using integer chips. These are circular chips, with a yellow chip representing +1 and a red chip representing -1. You start with the...
Engaging All Students in Meaningful Mathematics
Oct 10, 2018
“At the end of the day, this wasn’t about focusing on the objective, it was about making the objective meaningful to him.” The work of teaching is both invigorating and challenging. We want to instill a love of math and learning in every student, and ensure that each...
to the IM Blog and Newsletter
RECENT POSTS
- How Los Angeles Unified Paired IM® Math with Strong Implementation to Drive Gains Sep 1, 2026
- Anatomy of an IM® Math Lesson: Making Instructional Decisions with the Cool-down Aug 25, 2026
- Anatomy of an IM® Math Lesson: Making Meaning in the Lesson Synthesis Aug 18, 2026
- IM’s Back-to-School Toolkit 2026–27 Aug 11, 2026
- Anatomy of an IM® Math Lesson: Why Centers Matter Aug 3, 2026
Categories
- 5 Practices (1)
- 6–8 Math (157)
- 9–12 Math (125)
- Assessment (1)
- Back to School (8)
- Classroom Community (10)
- Classroom Discourse (10)
- Coaches Corner (13)
- Computational Fluency (2)
- Equity (8)
- Implementation (14)
- In the Classroom (16)
- Instructional Routines (10)
- K–5 Math (165)
- Lesson Planning (10)
- Math Content (6)
- Math Language Routines (3)
- Partners (5)
- Play-Based Learning (2)
- Problem-Based Learning (14)
- Professional Learning (98)
- Recent Blog Posts (12)
- Research Studies (3)
- Supports for English Language Learners (2)
- Supports for Students with Disabilities (7)
- TK/PK Math (14)
- Uncategorized (3)
- Unfinished Learning (1)









