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Dan Finkel

@mathforlove.bsky.social

235 Following1.3k Followers

Founder, Math for Love, mathforlove.com.
Dedicated to giving everyone a chance and a reason to fall in love with mathematics.
Curriculum writer, game developer, speaker, teacher of teachers.

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@mathforlove.bsky.socialOct 15, 2026, 11:16 PM

Do we know how much debt this is for?

@mnmmath.bsky.socialOct 14, 2026, 7:55 PMReposted by @mathforlove.bsky.social

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

Photo, no description
@steckl.esOct 12, 2026, 1:11 PMReposted by @mathforlove.bsky.social

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

Photo of the pages of a hand written maths zine
@mathforlove.bsky.socialOct 9, 2026, 6:04 AM

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-...

@studymaths.bsky.socialOct 8, 2026, 6:54 PMReposted by @mathforlove.bsky.social

I do have something along those lines!

A series of staircases cut from an initial square with more and more steps added to each diagram until the final picture looks like a triangle.
@mathforlove.bsky.socialOct 6, 2026, 12:58 AM

I love it, and I can't remember seeing anyone make this kind of design before. It looks like a kind of face to me. Or maybe it's purely abstract?
@triangleman.bsky.social
@davidkbutler.bsky.social

@mathforlove.bsky.socialOct 6, 2026, 12:58 AM

In a recent visit to some friends, I noticed that their 7-year-old son was playing with 21st Century Pattern Blocks. His mom sent me this photo today.

A collection of colorful blocks
@mathforlove.bsky.socialOct 3, 2026, 4:28 PM

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)

@tcarmody.bsky.socialOct 2, 2026, 2:38 PMReposted by @mathforlove.bsky.social

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

A tweet by SarahStarberry that says "oh god read the vertical axis" on top of a chart measuring AI models' release dates and model numbers rather than any real capabilities
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@mathforlove.bsky.socialSep 30, 2026, 7:15 AM

This also helps me understand why I've been so into the Zombies. They get to it really quickly, which I guess I like. But even though This Will Be Our Year is a great song, it wasn't my pick for this list - A Rose for Emily gets to the heart of the music/story basically as fast as possible.

@mathforlove.bsky.socialSep 30, 2026, 7:15 AM

Sometimes it misdirects you to present a revelation or bafflement of your expecation (A Fifth of Beethoven by Walter Murphy) And then there are some that I'm not sure how to classify Lachrymosa by Mozart Ring of Fire by Johnny Cash

@mathforlove.bsky.socialSep 30, 2026, 7:15 AM

I've been thinking about this question all evening. I think it's because the first fifteen seconds of a song can do such different work. Sometimes it just gets into the heart of the song (A Rose for Emily by the Zombies) Sometimes it's a completely different preamble (Rocky Raccoon, the Beatles)

@davidkbutler.bsky.socialSep 23, 2026, 11:55 PMReposted by @mathforlove.bsky.social

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.

A pattern block design between two angled mirrors so that the design is reflected around making something like a snowflake. It uses blocks in many colours and shapes.The previous design has been extended to the mirrors and out beyond the mirrors so that the reflections make it very very large. Several areas parts are made of multiple of the same shape joined together.
@davidkbutler.bsky.socialSep 23, 2026, 7:49 PMReposted by @mathforlove.bsky.social

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

A tower made of green wooden triangles. Each layer is made of four triangles: three standing on their sides and one flat on the tops of the three points. Each layer uses smaller triangles than the layer below.
@mathforlove.bsky.socialSep 14, 2026, 5:51 PM

These are great! I like vertical.

@mathforlove.bsky.socialSep 14, 2026, 5:16 PM

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/

@mathforlove.bsky.socialSep 10, 2026, 9:14 PM

This is really worth reading

@mathforlove.bsky.socialSep 9, 2026, 9:48 PM

That's super cool. We briefly considered the Ulam spiral for the official board.

@davidkbutler.bsky.socialSep 9, 2026, 8:27 PMReposted by @mathforlove.bsky.social

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

An arrangement of the Prime Climb cards into five blocks. 
The very far block in the distance just has the grey 1. 
The next block is three and a bit rows of 10 wide and each card has only one colour. Mostly red, then several yellow and a scattering of green, blue and purple.
The next block is five and a bit rows of 10 wide and each card has two colours. All five colours are represented many times.
The next block is only row of nine cards and each card has three different colours.
The final and nearest block is just the black 0 card.
@davidkbutler.bsky.socialSep 9, 2026, 8:20 PMReposted by @mathforlove.bsky.social

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.

A rectangle of laminated A4 cards laid on the floor. Each card has a circle with a number in it and the circle is divided into some number of coloured sections. The nearest corner has 80 with four yellow sections and one blue section, then 81 with four green sections, then 82 in the corner with one yellow and one red section, then 83 on the next edge with one red section, then 84 with one blue, one purple and two yellow sections. To the side of 82 not part of the main rectangle is a black card labelled Start and 0. Six people stand on six of the cards, though you can only see their legs.The same set of Prime Climb cards from a distance and from above. Four people stand on the cards and one is walking across them. Another stands to the side watching. One more person stands on the other side holding a board with spinners. Some people are wearing coloured fabric sashes.
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