#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

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

For a long time I was struggling with how to organize the various useful websites that I have found for math, science, teacher tools, and general fun. A few years ago I decided to organize them into a Google slide deck, and it seems to be working much better for me.
And now I share with you all....

https://docs.google.com/presentation/d/1BrSMYXjIIkzT8qQNR1mpheW1MIbTfbXdXD8hCN9pZ-g/edit#slide=id.p

#ClassroomMath #mtbos #iteachmath #scienceteacher

Codepen asked for spirals -

did I miss any? (no I didn't do ulam - should I?).

https://codepen.io/fractalkitty/live/MYwzROr/5517a9002126749dc03b84e2eceef51c

#codepen #spirals #codepenchallenge #cpc-spirals #math #spirals #mtbos

OMG! A Sess on #UDL #UDB w/ MM!
Or, in English, A session on 𝙐𝙣𝙞𝙫𝙚𝙧𝙨𝙖𝙡 𝘿𝙚𝙨𝙞𝙜𝙣 𝙛𝙤𝙧 𝙇𝙚𝙖𝙧𝙣𝙞𝙣𝙜 and U𝙐𝙣𝙙𝙚𝙧𝙨𝙩𝙖𝙣𝙙𝙞𝙣𝙜 𝙗𝙮 𝘿𝙚𝙨𝙞𝙜𝙣 by Mason McCormick.
Thursday, May 8th in the afternoon at #OAME2025
#mtbos #onted

I brushed up on my Desmos teacher activity builder skills in Desmos today and made a small intro to Conics.

Yeet Paths (AKA conic Sections) https://student.desmos.com/join/xaz6th

Teacher Activity link: https://teacher.desmos.com/activitybuilder/custom/67f86620cbcb18d701967369?utm_campaign=share&utm_content=activity

#conicSections #desmos #yeet #mtbos #iteachmath #mathart

. @j_lanier is hosting a math talk on Zoom at 5pm ET tomorrow (Fri June 28) as part of his "21st centuary mathematics" learning experience for K-12 math teachers.

Clyde Kertzer, Kate Stange, & Summer Haag will talk about their work on circle packings. Math teachers - fill out this form for the Zoom link. Will be fascinating! 🧮🧪

https://docs.google.com/forms/d/e/1FAIpQLSdmSDX9r-BeutSp4Fg1B40qZB-SgX9VhksMBp0rIvEjJfWi8g/viewform

RT https://x.com/j_lanier/status/1806468083407815132

#NumberTheory #circlepacking #mathed #mtbos #iteachmath

#ClassroomMath #Prompt1 #mtbos #iTeachMath

1) Hello, I am a HS math teacher in SoCal. I've taught everything from Basic Math (back in the day) to precalculus. Looking forward to teaching AP Precalculus in the fall.

2) First apple pie, second donut and third cake

3) Outside of the classroom, I am a soccer mom. With 2 boys playing club, there's very little down time. Between practices, league games and tournaments, we are busy all year long. In addition to that, I became the photographer for the two teams. I enjoy capturing the soccer action and recording images of my boys doing what they love.

Thanks @jreulbach and @samjshah for bringing us together.

I would love to pick your brain on #SBG @Mathvice I attempted it last year but I know it could be better.

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

Posting on here definitely feels different and more like posting into the void...but I kind of like it. It's freeing not worrying about a post getting likes (favourites) or replies and just saying what I feel.

Today I've been thinking about autonomy in planning maths lessons. Prompted by many things but brought to the forefront by Craig Barton's blog this morning (Link below)

I'm trying to mentally wrestle with the idea that I have, in the past, disliked being told how to teach if it's too prescriptive...I hated the thought of some structures I'd seen in other schools such as compulsory 10 minute retrieval where the questions were pre-prepared by someone else.
But I also find myself wanting to dictate methods, approaches and sometimes even a whole series of lessons.
But the crucial thing here is that I think I was scarred by some particularly bad ideas. Whole-school T&L policies which were driven by subjects very different to maths. Perhaps this made me resistant to being told to do something.
Now that we know better (I hope), are there aspects that could be much more prescribed?
And could there potentially be more creativity that comes from this? If we give teachers time back with the basics of lessons planned will there be more time for tweaking/adapting/thinking creatively about how to improve things?

https://open.substack.com/pub/eedi/p/how-prescriptive-should-a-head-of?r=38x5e&utm_campaign=post&utm_medium=email

#MathsEdChat #MTBoS #MathsEducation #TeachingMaths #MathsTeaching

#mtbos #iteachmath #D2l #brightspace #moodle
Lots of interactive online learning activities have nifty visual displays of student progress (ALEKS, et al).... is there a way to generate something like that in D2L or Moodle? I remember figuring out the code a million years ago in HTML / Javascript but if there's something already there

At @recursecenter in our Annotated Turing study group we got talking about diagonalization. I made a joke - then I made a poster and bumpersticker to go with it.

It's always a fun conversation to have - what is real - what can we express - what can we compute

#realNumbers #birdsarentreal #math #mathart #mtbos #recurseCenter #diagonalization #cantor

Hi all, a new #introduction for my new account on Sharkey. I'm Nick. I'm a #computerscience and #engineering secondary school #teacher in #Baltimore, Maryland, USA. I'm interested in #ai #artificialintelligence and #MachineLearning, #robotics and #automation, #Android #appdev, #cybersecurity, and more. I'd love to connect with other #csed folks from elementary to industry, folks interested in #engineeringeducation, and consider myself part of the #MTBoS #iteachmath community too. I also enjoy connecting to people outside my teaching roles! I enjoy #cats, #mystery novels, #nature walks, #travel. I care deeply about fighting for #peace, #socialjustice, and similar goals. And I also like thinking about the intersection of #stem with those goals, for example #aiethics and #RenewableEnergy. Testing out Sharkey on this new account, but I do have two other Fediverse accounts that I've had for a few years each (listed in bio) in case this account goes dark.

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

@Elishevacarl Adding HashTags:

#CommonCore #Trigonometry #MTBoS #ITeachMath

CC: @someonetellmetosleep @KarenCampe

#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

Working on a post for math storytelling day, but in the meantime here is a coloring sheet for a visual prompt:

#mtbos #iteachmath #mathart #mathStorytelling #storytelling #prompt #visualPrompt

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

A new post on the math blog! I built a couple of toys to play with as well.

Inquiries week 4: Triangulating Triangles

https://www.fractalkitty.com/inquiries-week-4-triangulate-the-triangle/

#indieweb #math #colorings #graphTheory #triangles #inquiry #mtbos #iteachmath #mathtoys

Here's a great problem from Donald Bell ... can you solve it?

========

Rectangling the Square:

Is there a set of rectangles, with no repeated length of side, that will tile more than one rectangle?

========

To get the context of the problem you'll need to read Donald's DOCX ... I'm not really in a position to extract and reformat it, but I'm hosting a copy here:

http://www.solipsys.co.uk/documents/DonaldBell_RectanglingTheSquare.docx

Love to hear your ideas !!

#MathsPuzzle #GeometryPuzzle #MTBoS

(Boosts welcome for reach)

💫 Join us for a workshop on math intervention focused on grades 3-5! This virtual workshop is free, thanks to the VT AOE! Learn more and register: https://hubs.ly/Q01KTqZ80
#mathintervention #mtbos #iteachmath #mathPD

✅ Check out this recent article by ALN Director of Operations Ashley Marlow @MarlowMathVT all about crafting an effective intervention block that goes beyond just rote skill practice.
➡️ Read the full article on @edutopia
https://hubs.li/Q01Myb500 #mathPD #mtbos #mtss #iteachmath

⭐️ Do you work with students who are struggling - unproductively - with math?
➡️ This (FREE) 12-hour workshop is for you! Join us in Burlington, VT to learn with us!
Learn more and register: https://hubs.li/Q01KTlWM0
#mtbos #mathPD #teacherPD #iteachmath

❤️ You've heard it from us before... All means ALL! Join @MarlowMathVT & Sandi Stanhope at our beautiful ALN VT Learning Center in Burlington, VT for this (FREE) workshop on equity, inclusion & classroom culture! Learn more and register: https://hubs.li/Q01KTkjG0 #mathPD #mtbos

📣 We have had such great feedback from participants of our 2023 Virtual Conference! Did you miss out on joining us live? Don't worry! ✅ You can access the recordings for FREE by filling out this form: https://hubs.li/Q01GFL-y0 #mathPD #mtbos #iteachmath

⭐️ What would your next step be after seeing this student work? What do you notice about what this student CAN do? What do you wonder about this students' math understanding? What would you want to ask this student next? #mathPD #mtbos #iteachmath #studentwork

🧶 Problem Solving is for EVERYONE! At our recent virtual conference, ALN Facilitator Erin Oliver presented about how problem solving can be an act of inclusion in our classrooms. Missed the conference? Access the recordings for free here: https://hubs.li/Q01GCJjt0 #mathPD #mtbos