Dan Finkel

I wrote a newsletter about AI and math last week. More folks than usual wrote me about it, so I thought I should put it on the math for love blog too. mathforlove.com/2026/10/a-fo...

Join your math friends for 2026 NCTM Game Night! Spend the evening enjoying math games, puzzles, raffle prizes, fellowship, & friends. Wednesday, October 28, 2026 8:30–10:30 PM Bluebird Ballroom, 3rd Floor Cash bar available. Come play, connect, & have fun. Bring a friend! #MTBoS #ElemMathChat

I continue to find a bit of time each day to produce a zine for #mathober! Today's is about the Reciprocal Prime Constant, which is nicely related to a thing I already knew about, but M is new to me. PDF: https://katiesteckles.co.uk/mo12

Big numbers are very hard to develop an intuition for. That's why this little game from @wired.com is so surprising and fun www.wired.com/story/spend-...

I do have something along those lines!

When we talk about misleading representations of data, this one may have to be in the hall of fame. (Though I assume it was a joke in the first place)

This is the funniest thing I've seen today, possibly ever

Two stages of a pattern blocks design between two mirrors, at #100factorial yesterday. The designer was unsatisfied with her first design, wanting a bigger triangle to fill the corner next to the orange square. I suggested making a bigger pink triangle out of four smaller ones and off she went.

An unexpected use of the upscale pattern blocks at #100factorial yesterday @mathforlove.bsky.social

I signed this petition, and if early numeracy is something you care about, you should think about signing it too :-) __________________________ When kids play, we all win. Games help kids build math skills. Let’s get every kid playing. Learn more and sign the petition: weareallsolvers.org/aap/

This is really worth reading

Before the second game we arranged the cards by number of distinct prime factors (or by number of different colours if you like).

Bodyscale Prime Climb at #100factorial yesterday. We arranged the cards in an Ulam spiral first to see what that looked like with the coloured cards.

Holy Gahbajoly. An internal OpenAI model may have just solved a Millennium problem. 🤯 openai.com/index/navier...

Here's a fun problem from Polya: 72 turkeys cost $ _67.9_ >What are the missing digits? >How much does a single turkey cost? (Note - the price for a turkey is going to look wildly out of date) #iteachmath

The August Mindbender (Jumping Pegs) from @3blue1brown.com @momath.bsky.social and others is basically a perfect puzzle. Simple, unexpected, and with (I assume) many, many ways to approach and solve it. momath.org/mindbenders/ I'll need to check out all the puzzles in this series!

Looking for some challenging math riddles for your students? These 25+ problems were created by Dan Finkel from Math for Love for TedEd. Check them out here: ed.ted.com/search?utf8=%E2%... They're lots of fun to use with your students.

This week's Weekly Wonders from earlyfamilymath.org/weekly-wonder/ and @mathforlove.bsky.social are all nice Nim variations. Like Factor Nim quite a bit. #mathgame

This was so much fun. Our run ended a July 31 but we are adding even more Math Rooms this fall.

Maybe not what they were thinking of, but Tiny Polka Dot is on my gift list for little ones who enjoy mathy thinking. mathforlove.com/games/tiny-p...

"It doesn't have to be perfect, it just has to be fun!" Love this #earlymathvideo from STEM Utah! @earlyfamilymath.bsky.social www.youtube.com/shorts/94Kqk...

I don't agree with Bret Stephens very often. I do here. Machines can lift more than we can. We don't use them to lift weights for us when we go to the gym. www.nytimes.com/2026/08/04/o...

"Manipulatives make Deep Work more Accessible" - words to thrive by. And there is so much more. Read this blog post.

If anyone still reads long blog posts, I just wrote a reflection on our pilot project with Seattle Public Schools of last year. It was kind of an amazing collaboration. #iteachmath #mtbos mathforlove.com/2026/08/who-...

We're proud to help share COUNTED OUT, an award-winning documentary by Vicki Abeles that asks an urgent question: how do we reclaim our mathematical confidence in the age of AI? Saturday, August 8, 2026 1:00 PM PT / 4:00 PM ET RSVP: bit.ly/CountedOutAug8

Pattern block and joined mirror designs made by the university students at the O’Week One Hundred Factorial sessions this week.

Just learned that Lucas invented the Towers of Hanoi and was the first person to write down the rules of Dots and Boxes. (Died from sepsis from an accidental scratch from a broken plate! Crazy. Tough living pre-antibiotics.) en.wikipedia.org/wiki/%C3%89d...

Hey! I wrote something about teaching and Dan wrote something back. What year is this, 2012? (Read Dan's thing, it's interesting.)

I wrote about how @hpicciotto.bsky.social makes such wonderful (and useful) mathematical activities. substack.com/home/post/p-...

Math On-A-Stick sign ups are live! www.signupgenius.com/go/4090F44AB...

Wow - a cool local decor store stocks our games. And Rolly Poly is on an incredible sale there right now! digsshowroom.com/products/rol...

Problem of the Week 177! Please do not comment the solution so others can work it out too. Instead, like this post or comment a thumbs up if you think you have the correct answer! The solution will be posted in the comments on Thursday afternoon. #Problem #UKMT #Maths

This book is ridiculously good.

Reposting with a hearty endorsement :-)

#ChoralCounting in 1st Grade...total joy! What do you notice? What do you wonder?

It's Mental Math Monday! Is 15.99/3.99 greater than 4, less than 4, or equal to 4? How are you thinking about it?

Looking back at some of the shapes and designs from my pattern block play in May! #21CenturyPB #iTeachMath

Pattern bracelets! cc @nhoskee.bsky.social talkingmathwithkids.com/blog/pattern...

This is a fun one. Not even sure if it’s possible to nail down the answer with certainty!

Pattern block play! #21CenturyPB #iTeachMath