Very good piece on the quite fast rollout of "AI-powered" textbooks in South Korea. The government went from making the textbooks mandatory to supplementary because of complaints and now the textbook companies are suing because "the market suddenly disappear[ed]." restofworld.org/2025/south-k...

I'll just be over here banging my head against the table. www.theatlantic.com/ideas/2025/1...

I've been making paper constructions of pattern blocks, then decided to add some extra ones to the traditional set. I'm particularly proud of this irregular pentagon. Even though I worked this out according to my own agenda, it's characteristics are so cool that I have no doubt that it's a shape +

❤️ Love this ❤️ @mathforge.org has done what I’ve never been organised enough to do myself, and catalogued every #geometrypuzzle I’ve ever posted on social media. It looks amazing!

seems like the easier solution is to give everyone free healthcare and pay for it by like buying 17 less missiles or taxing 53 dudes 1.8 percent more

Geometry just needs to be two units: * Yep, it adds to 180! * Ok, but what if we cut it in half like THIS?

Will NYS math assessments ever not be the literal freaking worst?

So much for that extra hour of sleep lol baseball is the worst

200 years ago today, October 26, 1825: The Erie Canal was ceremonially opened in Buffalo, New York. The 363-mile-long artificial waterway stretched from Albany on the Hudson River to Buffalo on Lake Erie, connecting the Great Lakes to the Atlantic Ocean. It transformed Buffalo into a major hub.

Anyone out there know of a crosswalk between the Data Science Learning progressions and the Common Core SP standards? datasciencelearning.org

On of my geometry students just talked about the Angle Addition Prostitute and I think my day is over.

I've 100% met this lady. "WHAT I AM BOTHERED BY? UNILLUSTRATED WORD PROBLEMS. SO LET’S GET ILLUSTRATING" pershmail.substack.com/p/curriculum...

Is it universally true that there is a shortage of red cuisenaire rods? Or do they just blink into another dimension in my presence?

It is 2025 and computers still suck at fractions.

Sal Khan's career is very much a "right place right time" situation and he has not learned a single thing about teaching in all these years.

Hey #mathsky, would it be too nerdy if @bookshop.org branded their Anti-Prime free shipping deal "Composite"? Asking for a friend.

quick while the government is shut down let’s all switch to metric

Peter Singh TDSB : how do you ensure that time saved by #AI doesn't turn into "latte time" (his words) for teachers. Well first. Every time saving innovation over the past hundred years has not reduced teacher work hours. And second. OFFENDED. Microsoft #AITour #mtbos #onted

The gap between teacher pay and other college graduates’ pay is the highest it’s been in over four decades. Is there a “teacher shortage,” or a shortage of jobs that treat educators with the pay, dignity, and support they deserve?

@geogebra.org This is so cute www.geogebra.org/m/tmqgzrtj

Phew, demonstrating long division in base four starts to feel very numberwang very fast.

I was feeling lost about handling instructional time for operations in bases other than ten, and then I remembered that the worked example protocol exists. Thank you again for your wonderful book, @mpershan.bsky.social

As someone who's spent decades mapping the invisible—from creating 3D digital oceans to diving deep unexplored places—I'm moved by how satellite imagery just delivered justice for Argentina's penguins + other wildlife. SOMETIMES JUSTICE NEEDS COORDINATES! www.esri.com/about/newsro...

Yep a good-faith critique of learning loss would lead to proposals for a massive, New Deal-scale investment in public education. The people pushing the narrative are doing precisely the opposite.

classes start tomorrow and my brightspace isn't set up so of course I am ... decorating the back of my clipboard with all the random ass stickers lying around

As the piece notes, the PragerU propaganda is being used in schools in Louisiana, Florida, New Hampshire, Oklahoma, Montana, Arizona, South Carolina and Idaho. Check with your district to see if they're using this garbage to brainwash your kids.

Friendly reminder that school administrators tend to take complaints from parents much more seriously than the same complaints from teachers. So if your kids’ school district is using PragerU stuff, please speak up.

Please write your own damn stuff. From me today in McSweeney's! www.mcsweeneys.net/articles/hon...

A beautifully detailed version of an old pie chart joke.

Me three months ago:

The math educator to Balatro addict pipeline is real

That's how you can tell human authors from AI. AI will put in some em dashes, then apologise and take them out when told off. Human authors will climb the filing cabinet, hissing, and defend their right to em dashes with a loaded stapler.

Just a usual 2025 Friday night sending angry useless emails to my elected representatives

I maintain that while high school is meant in part to help prepare kids for the world in general, we are not doing job training. It's my job to get kids to think critically, not teach some janky-ass computer program that requires no skillset.

My latest for @nytimes.com -- please repost so your followers can see this for free. www.nytimes.com/interactive/...

I put together a 4-page doc for those wary of the rush to integrate in K-12 schools (though much applies beyond). Four of the main arguments for teachers using AI tools & introducing kids to AI as early as kindergarten are addressed with rebuttals linked to sources.

We are two weeks out from the start of "21st century mathematics", a program I run for K-12 math teachers. (Register now!) The program helps teachers connect the math they teach with some math that has been discovered in the 21st century. The program is flexible, free, & online.

Speaking as a fellow western New Yorker, Jenn is the kind of reality-based candidate we need to win local seats. Please join me in making a donation if you can. ❤️

My ESL tutee is...done? 🎉 She has worked very hard. The one thing I feel I can take credit for is getting her to pronounce "on" like a Buffalonian.

I feel like the more DIY inclined teachers I know would be into this. pontus.granstrom.me/scrappy/ #mathsky

Anyone out there using Snorkl? I know a middle school admin who claims students "love it" but I'm a bit dubious. Considering trying it out in the fall (in a math for elem ed majors course). snorkl.app

How to freehand an icosahedron #mathart

I know everyone knows polypad but honestly its number line creator is the best available. All the flexibility, easy UI, just works, does FRACTIONS, doesn't make you have STUPID ARROWS by default but you can turn them on if you insist, exports a sensible window and not your whole screen. Just mwah.

it's kind of astonishing just how terrible openai still is at generating math diagrams. I asked it for "a tape diagram representing 75% of 8 = 6."

In my latest "Devlin's Angle" post for the MAA, I reflect on the legendary math educator and civil rights advocate Bob Moses. maa.org/math-values/...

Western New Yorkers! (both of you?) We're screening Counted Out at Buff State tonight at 5! It's free! Register here: www.eventbrite.com/e/buffalo-st...

It's Teacher Appreciation Week. Here's how to appreciate teachers: pay them better.