#mtbos — Public Fediverse posts

new post on fractal kitty -

https://www.fractalkitty.com/inquiries-week-9-mod-multiplication/

#indieweb #mtbos

New issue of my newsletter: thinking classrooms, coaching, functions and rate of change.
https://www.mathed.page/newsletter/2026-05.html

#mtbos #iteachmath #mathed

@joshg I wonder if Geogebra has things?
I share the frustration --> it's folks like @KarenCampe who have been awesome at making things that work for my folks who benefit when even the most basic things made visual. And I sorely miss #mtbos -- there might be a few more people over on bsky.com ...

New post with the pentomino toy:

https://www.fractalkitty.com/inquiries-week-8-fence-maxing/

I hope to have a follow up post on it in the next day with another extension.

#pentominoes #mtbos #geometry #optimization #iteachmath

New post with the pentomino toy:

https://www.fractalkitty.com/inquiries-week-8-fence-maxing/

I hope to have a follow up post on it in the next day with another extension.

#pentominoes #mtbos #geometry #optimization #iteachmath

New post with the pentomino toy:

https://www.fractalkitty.com/inquiries-week-8-fence-maxing/

I hope to have a follow up post on it in the next day with another extension.

#pentominoes #mtbos #geometry #optimization #iteachmath

New post with the pentomino toy:

https://www.fractalkitty.com/inquiries-week-8-fence-maxing/

I hope to have a follow up post on it in the next day with another extension.

#pentominoes #mtbos #geometry #optimization #iteachmath

New post with the pentomino toy:

https://www.fractalkitty.com/inquiries-week-8-fence-maxing/

I hope to have a follow up post on it in the next day with another extension.

#pentominoes #mtbos #geometry #optimization #iteachmath

I got tired of counting squares. (prototype)

I got 122 today playing with it - what can you get?

#fenceMaxing #pentaminos #iteachmath #mtbos

https://www.inquiries.link/tools/puzzles/fence-pentamino

I got tired of counting squares. (prototype)

I got 122 today playing with it - what can you get?

#fenceMaxing #pentaminos #iteachmath #mtbos

https://www.inquiries.link/tools/puzzles/fence-pentamino

I got tired of counting squares. (prototype)

I got 122 today playing with it - what can you get?

#fenceMaxing #pentaminos #iteachmath #mtbos

https://www.inquiries.link/tools/puzzles/fence-pentamino

I got tired of counting squares. (prototype)

I got 122 today playing with it - what can you get?

#fenceMaxing #pentaminos #iteachmath #mtbos

https://www.inquiries.link/tools/puzzles/fence-pentamino

I got tired of counting squares. (prototype)

I got 122 today playing with it - what can you get?

#fenceMaxing #pentaminos #iteachmath #mtbos

https://www.inquiries.link/tools/puzzles/fence-pentamino

The first issue of The Mathematical Gazette with me as Editor has arrived in the post!

Non-subscribers can read my editorial (and some other papers in this issue) for free at https://www.tandfonline.com/doi/full/10.1080/00255572.2026.2617021

#MathsToday #MTBoS #ITeachMath

The first issue of The Mathematical Gazette with me as Editor has arrived in the post!

Non-subscribers can read my editorial (and some other papers in this issue) for free at https://www.tandfonline.com/doi/full/10.1080/00255572.2026.2617021

#MathsToday #MTBoS #ITeachMath

New inquiry post with odious numbers: https://www.fractalkitty.com/inquiries-week-7-eooeoeeo/
#mtbos #iteachmath

#mtbos and in the "let's use nice language to limit opportunities," the "Strong Start To Finish" folks write that "almost no one needs college algebra anymore." Also, states are "resdesigning developmental education."
Once more, how about at least *looking* at why students are getting through high school without the math skills? SHHH.

Until March 31, 20% off on my book (There Is No One Way to Teach Math). More info:

https://www.mathed.page/teaching/no-one-way-discount.pdf

#mtbos #iteachmath #mathed

added a variation of stop-gate(domineering) to play with. After each move, scorch a space one king's move away:

https://inquiries.link/tools/puzzles/twos-on-grids/full

#mtbos #iteachmath #mathToys

#mtbos so I think I figured out that my Moodle class ... well, you just can't really sign up with your email. (Perhaps something's built into my site architecture for spam control.) But if you know somebody who wants to try a conceptual, little bit at a time, number sense based "course" https://resourceroom.net/class/ will get them there and I can sign them up :P NO cost or commitment... even figuring out how to get signing up to work is helpful.

RE: https://mastodontti.fi/@mrahikka/116187007911969723

#mtbos this is awesome

#mtbos Today is "professional development day" at the college.
Batting 1000 on: if there's an educational gathering, *somebody* will bring up fractions as a teaching issue. Every adult ed thing, every math thing... this was an "accessibility in your courses" and as I walked in the room somebody had just said the word before anything had started.
Yes, they have my email now

https://bsky.app/profile/davidkbutler.bsky.social/post/3meckfn2nfc2z #mtbos this one ... I have no earthly idea how to begin :) :) But I rarely do in geometry and ... often figure things out.

New post on Fractal Kitty:

https://www.fractalkitty.com/filtering-snowflakes/

#mathart #pascalsTriangle #binomialExpansion #mtbos #snowflakes #iteachmath

There is no one way: ten approaches to slope!

https://blog.mathed.page/2026/01/23/rate-of-change-no-one-way/

(My response to an insightful post by @dan Meyer.)

#mtbos #iteachmath #mathed

#DebateMath : Is #AI Helpful in Math Education?
Listen on Apple Podcasts: https://podcasts.apple.com/us/podcast/debatemath-podcast/id1596735280
Or listen on Spotify:
https://open.spotify.com/show/3soGg9IF2R2kBWkVUq77NC
Or watch on YouTube: https://www.youtube.com/channel/UCjk47IGz9UmBGYewHNrhF_g/videos
Or check it out wherever you listen to podcasts!
#mtbos #mathed #onted

#DebateMath : Is #AI Helpful in Math Education?
Listen on Apple Podcasts: https://podcasts.apple.com/us/podcast/debatemath-podcast/id1596735280
Or listen on Spotify:
https://open.spotify.com/show/3soGg9IF2R2kBWkVUq77NC
Or watch on YouTube: https://www.youtube.com/channel/UCjk47IGz9UmBGYewHNrhF_g/videos
Or check it out wherever you listen to podcasts!
#mtbos #mathed #onted

#DebateMath : Is #AI Helpful in Math Education?
Listen on Apple Podcasts: https://podcasts.apple.com/us/podcast/debatemath-podcast/id1596735280
Or listen on Spotify:
https://open.spotify.com/show/3soGg9IF2R2kBWkVUq77NC
Or watch on YouTube: https://www.youtube.com/channel/UCjk47IGz9UmBGYewHNrhF_g/videos
Or check it out wherever you listen to podcasts!
#mtbos #mathed #onted

#DebateMath : Is #AI Helpful in Math Education?
Listen on Apple Podcasts: https://podcasts.apple.com/us/podcast/debatemath-podcast/id1596735280
Or listen on Spotify:
https://open.spotify.com/show/3soGg9IF2R2kBWkVUq77NC
Or watch on YouTube: https://www.youtube.com/channel/UCjk47IGz9UmBGYewHNrhF_g/videos
Or check it out wherever you listen to podcasts!
#mtbos #mathed #onted

#DebateMath : Is #AI Helpful in Math Education?
Listen on Apple Podcasts: https://podcasts.apple.com/us/podcast/debatemath-podcast/id1596735280
Or listen on Spotify:
https://open.spotify.com/show/3soGg9IF2R2kBWkVUq77NC
Or watch on YouTube: https://www.youtube.com/channel/UCjk47IGz9UmBGYewHNrhF_g/videos
Or check it out wherever you listen to podcasts!
#mtbos #mathed #onted

If anyone needs a paint with only circles, here it is. These are drafted toys I use in facilitating math explorations.

https://inquiries.link/tools/geometry/circle-paint/full

If anyone needs a loopy-doodle math toy here it is:

https://inquiries.link/tools/geometry/loopy-doodles/full

#mtbos #mathtoys #mathart

Finished making a post for Beautiful Chords today with some extra tools. It would be really easy to keep going and make a Monte Carlo for random chords, rotations of connected shapes, moire strings, shadow art with strings, etc.

https://www.fractalkitty.com/inquiries-week-6-beautiful-chords/

#mtbos #mathart #stringart #decemberAdventure #indieweb

Some pundits (and some colleagues) claim we teach too much math. How do we respond? I'll share some thoughts at the CMC-North conference in Asilomar.

Algebra and Geometry for All Students!
December 6, 9:20am

I hope to see some of you there!

#mtbos #iteachmath #mathed #cmc-north #asilomar

Some pundits (and some colleagues) claim we teach too much math. How do we respond? I'll share some thoughts at the CMC-North conference in Asilomar.

Algebra and Geometry for All Students!
December 6, 9:20am

I hope to see some of you there!

#mtbos #iteachmath #mathed #cmc-north #asilomar

Some pundits (and some colleagues) claim we teach too much math. How do we respond? I'll share some thoughts at the CMC-North conference in Asilomar.

Algebra and Geometry for All Students!
December 6, 9:20am

I hope to see some of you there!

#mtbos #iteachmath #mathed #cmc-north #asilomar

Some pundits (and some colleagues) claim we teach too much math. How do we respond? I'll share some thoughts at the CMC-North conference in Asilomar.

Algebra and Geometry for All Students!
December 6, 9:20am

I hope to see some of you there!

#mtbos #iteachmath #mathed #cmc-north #asilomar

Some pundits (and some colleagues) claim we teach too much math. How do we respond? I'll share some thoughts at the CMC-North conference in Asilomar.

Algebra and Geometry for All Students!
December 6, 9:20am

I hope to see some of you there!

#mtbos #iteachmath #mathed #cmc-north #asilomar

A new inquiry activity is posted on Fractal Kitty!

https://www.fractalkitty.com/inquiries-week-5-triangles-emerge/

This one plays with graphs and can be used as an extension to Sim, Don't Make a Triangle, and other such games.

#mtbos #iteachmath #mathplay #accessibleProofs #inquiry #turan #graphTheory #triangles

So I had two tasks at #NCTMATL25 (besides presenting with Cynthia Shi) ... see @pegcagle and Gail Burrill ... mission accomplished! And a bonus visit with Vicki Lyons
Forgot to take a pic with Peg & Vicki, but I got Gail!
#mtbos #mathed

Okay, this is still an issue in high school
#nctmatl25 #mtbos #mathed

Each representation is correct, but which are helpful, at what stage, and for which purpose?
#nctmatl25 #mtbos #mathed

So the previous session mentioned procedural fluency versus conceptual understanding.
The next session drove the point home.
#nctmatl25 #mtbos #mathed

The only reason I would want to teach small children would be for the contexts - & sketches - they create!
#nctmatl25 #mtbos #mathed

Use "Create a mathematical sketch" rather than "draw a picture"
(it was referenced from another session so I don't have a reason why atm)
#nctmatl25 #mtbos #mathed

Note to self ... Look up research on gesturing in mathematics education.
If any of you out in the #mtbos have some ideas ...
#NCTMATL25 #mathed

"Because of the abstract nature of mathematics, people have access to mathematical ideas only through the representations of those ideas" from Adding It Up.
#nctmatl25 #mtbos #mathed

Oh... The exhibit hall at #NCTMATL25 isn't open today, now that I have some time.
#mtbos #mathed

"I want procedural fluency from conceptual understanding"
#nctmatl25 #mtbos #mathed

The session had us ask our favorite #AI what we should do in Atlanta while at
@NCTM

I love #chatOAME :)
#NCTMATL25 #mtbos #onted #mathed

LLMs are based on dynamical systems, yet we don't do any of that mathematics in K12 -- even though we had standards and courses in some jurisdictions for high school (#onted did!)
At #nctmatl25 #mtbos #mathed