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Kirk Keating @ksquaredmathns.bsky.social · 5h

Join us in Moncton NB for the 2026 Building Thinking Classrooms Regional Conference with @peterliljedahl.bsky.social @btcthinks.bsky.social July 6–7, 2026! 🧠📚
💡 Discover practical strategies to spark deep thinking in your classroom
📩 Sign up for updates: tinyurl.com/yc6cfbzk

Reposted by Kirk Keating

Fawn Nguyen @fawnnguyen.substack.com · 1d

Look what arrived! Just when you thought the K-5 book was big, the 6-12 is even thicker!
I've been through it already and wow—peterliljedahl.bsky.social and @webbkyle.bsky.social really delivered. You want this. 🔥

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Reposted by Kirk Keating

Howie Hua @howiehua.bsky.social · 15d

TODAY'S THE DAY! It's one of the coolest dates of our lifetime.

Whether you go by month/day/year or day/month/year, if we write the date as one number, we will get a square number! Both sides can agree that today's date is a square date.

9,272,025=3045²
27,092,025=5205²

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Reposted by Kirk Keating

Dr Pamela Seda @pamseda1.bsky.social · 17d

At NCTM 2025 Annual Meeting & Exposition, we’re showing how BTC & ICUCARE transform math for learners who’ve been left out.
📢Empowering Marginalized Learners in Mathematics
📅 Oct 18 | 8 AM | Georgia World Congress Center
With Dr. Peter Liljedahl
🔗 www.nctm.org/atlanta2025/...
#NCTM2025 #NCTMATL25

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Reposted by Kirk Keating

Dan Finkel @mathforlove.bsky.social · 17d

Proofing #SubtractionbyHeart! The new cards are looking lovely :-)
We should have these out by early 2026!
#iteachmath #mtbos

A box of flash cards called Subtraction by Heart

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Reposted by Kirk Keating

Marilyn Burns @mburnsmath.bsky.social · 18d

I'm excited to present a free webinar on September 30. Register here: heinemann.zoom.us/webinar/regi...

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Reposted by Kirk Keating

Howie Hua @howiehua.bsky.social · 21d

Did you know that we can visually see why sqrt(40)=2sqrt(10)? Let's see how we can visualize rewriting square roots!

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Reposted by Kirk Keating

BTCthinks.bsky.social @btcthinks.bsky.social · 22d

🚨 Registration is OPEN for the Building Thinking Classrooms online workshop w/ @pgliljedahl.bsky.social via @grassrootsworkshops.com!

🧠 6 modules packed videos, strategies & real examples to get students collaborating & thinking deeply.

👉 Register by Oct 3

grassrootsworkshops.com/workshops/bu...

The image at the bottom shows Peter Liljedahl being video recorded.

The top of the poster includes this text:

"Grassroots Workshop"
"Building Thinking Classrooms Online Workshop with Peter Liljedahl"
Dates are October 6 to November 14, 2025.

Also included in the text is 6 modules, 14 BTC practices and 16 PD Hours.

The cost is described as 4 months access for $345 USD and 12 months access for $414 USD.

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Kirk Keating @ksquaredmathns.bsky.social · 23d

Such a great conversation with @peterliljedahl.bsky.social & @mikeflynn55.bsky.social on what has changed since the orange book. Lots of great dialogue on the closing & building rubrics early. All these ideas will be here ➡️https://grassrootsworkshops.com/workshops/building-thinking-classrooms

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Reposted by Kirk Keating

Maegan Giroux @maegangiroux.bsky.social · 23d

Visual Patterns 🤝 Pattern Blocks
I am currently OBSESSED, in a (mostly) healthy way, with @fawnnguyen.substack.com visual patterns and @mathforlove.bsky.social pattern blocks for kids to learn and create patterns. Ah-may-zing. Also, I am in LOVE with Mary Vail's Thinking Desks, they are phenomenal!

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Reposted by Kirk Keating

Robert Kaplinsky @robertkaplinsky.com · 24d

Can your high school students create a parallelogram, triangle, or rectangle by listing their points when given one? Find out using these three Open Middle problem from Bryan Anderson.
www.openmiddle.com/creating...
www.openmiddle.com/creating...
www.openmiddle.com/creating...

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Reposted by Kirk Keating

Howie Hua @howiehua.bsky.social · 24d

Create a number where the sum of the digits is a multiple of 9. It is guaranteed that the number you created is a multiple of 9. Here's why this will always work:

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Reposted by Kirk Keating

Mike Flynn @mikeflynn55.bsky.social · 26d

So excited for the workshop to launch. There are so many new ideas shared as well as new ways to see the ideas that were presented in the books. #buildingthinkingclassrooms

Kirk Keating @ksquaredmathns.bsky.social · 27d

Registration for grassrootsworkshops.com/workshops/bu... opens up this Friday, September 19th!
We are super excited to share this video-based, self paced workshop with you! #btcthinks
@peterliljedahl.bsky.social @robertkaplinsky.com @mikeflynn55.bsky.social @btcthinks.bsky.social

Building Thinking Classrooms ™ - Grassroots Workshops

Build your own Thinking Classroom using 14 research-based practices that empower students to collaborate, persevere, and think deeply and critically.

grassrootsworkshops.com

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Reposted by Kirk Keating

Nova Katz @novakatz.bsky.social · 26d

Sometimes you stand on the furniture when creating a Thinking Classroom with a room full of families!

#theanswersare #buildingthinkingclassrooms
#iteachmath

As Peter says, “The furniture moves.” But sometimes there’s no where for it to go! 🤣

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Reposted by Kirk Keating

Robert Kaplinsky @robertkaplinsky.com · 27d

Here are three reasons I think all math educators should use social media to improve professionally.

robertkaplinsky.com/3-reaso...

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Reposted by Kirk Keating

L. Kennedy @lkennedy37.bsky.social · 26d

makemathmoments.com/summit

2025 Make Math Moments Virtual Summit

Free high impact MATH PD from your couch! Hosted by @makemathmoments #mmmsummit2025

makemathmoments.com

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Reposted by Kirk Keating

JoAnn Sandford @jsandford.bsky.social · 28d

My latest newsletter!
Check it out:
drive.google.com/file/d/1nxRu...

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Kirk Keating @ksquaredmathns.bsky.social · 27d

Registration for grassrootsworkshops.com/workshops/bu... opens up this Friday, September 19th!
We are super excited to share this video-based, self paced workshop with you! #btcthinks
@peterliljedahl.bsky.social @robertkaplinsky.com @mikeflynn55.bsky.social @btcthinks.bsky.social

Building Thinking Classrooms ™ - Grassroots Workshops

Build your own Thinking Classroom using 14 research-based practices that empower students to collaborate, persevere, and think deeply and critically.

grassrootsworkshops.com

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Reposted by Kirk Keating

Robert Kaplinsky @robertkaplinsky.com · 29d

Check out the professional development options on Grassroots Workshops (@grassrootsworkshops.com‬). There are flexible online workshops on topics including mathematics, social justice, teaching online, coding, English, wellness, and science.
grassrootsworkshops.com/

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Reposted by Kirk Keating

Robert Kaplinsky @robertkaplinsky.com · 29d

Want to help students develop conceptual understanding of parabolas? This lesson uses the game Angry Birds as a context for understanding what information you need to graph a quadratic.

robertkaplinsky.com/work/an...

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Reposted by Kirk Keating

Kirsten Dyck @kirstdy.bsky.social · 29d

A wonderful learning day in PSSD about Spiraling Your Math Curriculum. Always happy to have access to @wipebook.bsky.social for our thinking tasks & collaboration time! @pstateachers.bsky.social

Collage with four photos. Three of teachers working collaboratively on a math task. One photo of an array of sticky notes showing how a year plan might be spiraled in math.

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Reposted by Kirk Keating

BTCthinks.bsky.social @btcthinks.bsky.social · Sep 6

Peter Liljedahl and Mike Flynn will be hosting a live webinar about #BTCthinks.

Join Peter, Mike and classroom educators on Sept. 18 at 5:00 PM PST for a live conversation.

Registration is FREE for anyone to attend!

Register here:
www.buildingthinkingclassrooms.com/webinar

#MTBoS
#iteachmath

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Reposted by Kirk Keating

Robert Kaplinsky @robertkaplinsky.com · Sep 3

Did you know that Hyundai offers a 100,000 mile in countries that use miles and 100,000 km warranty in countries that use the metric system? Are they the same? If not, which is better for the consumer and which is better for Hyundai?

robertkaplinsky.com/work/ca...

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Reposted by Kirk Keating

David K Butler @davidkbutler.bsky.social · Aug 24

A thing I made back in 2017.
Twelve pyramids joined together in two zigzags roll up into two cubes and one silver rhombic dodecahedron.

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Reposted by Kirk Keating

Dwayne Slobodnick @mrslobodnick.bsky.social · Jul 30

Thanks to all the participants in my Rich Task and AI Workshop today at #ITCamp2025. So much wonderful learning! @wipebook.bsky.social #hrcemath

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