Christopher Danielson
@triangleman.bsky.social
Kids, math, fruit, words
talkingmathwithkids.com
talkingmathwithkids.com
This was a wild read in my actual physical newspaper this morning, and as a white-male author I have been composing a response in my head all day.
This shit is made up, actually
December 26, 2025 at 9:24 PM
This was a wild read in my actual physical newspaper this morning, and as a white-male author I have been composing a response in my head all day.
Reposted by Christopher Danielson
Sonny Rollins getting ready to go onstage at the Apollo Theatre in New York City, 1961.
Photograph by Steve Schapiro.
Photograph by Steve Schapiro.
December 25, 2025 at 7:16 PM
Sonny Rollins getting ready to go onstage at the Apollo Theatre in New York City, 1961.
Photograph by Steve Schapiro.
Photograph by Steve Schapiro.
Reposted by Christopher Danielson
More dodecagons from September 2025! This time, it shows the designs without the hexagonal center, forming a wreath-like arrangement. #21CenturyPB #iTeachMath
December 25, 2025 at 5:17 PM
More dodecagons from September 2025! This time, it shows the designs without the hexagonal center, forming a wreath-like arrangement. #21CenturyPB #iTeachMath
Come for the mending! Stay for the cute dog! Or vice versa. Anyway, s/o to @anniekp.bsky.social for inspiration
December 24, 2025 at 11:03 PM
Come for the mending! Stay for the cute dog! Or vice versa. Anyway, s/o to @anniekp.bsky.social for inspiration
Dig that sweet kitchen hexagon!
geodesic dome home in north Minneapolis! effing gorgeous. for a geodesic dome home fan...
www.zillow.com/homedetails/...
www.zillow.com/homedetails/...
www.zillow.com
December 24, 2025 at 7:18 PM
Dig that sweet kitchen hexagon!
Reposted by Christopher Danielson
My 6 yo is always busy with projects. Currently, she is designing party hats for her dolls. I told her it was really impressive and she said “what? I’m just cutting out triangles, rolling them up, and taping them.” I asked her how she knew to do that and she said “I just saw it in my head.” #tmwyk
December 23, 2025 at 6:34 PM
My 6 yo is always busy with projects. Currently, she is designing party hats for her dolls. I told her it was really impressive and she said “what? I’m just cutting out triangles, rolling them up, and taping them.” I asked her how she knew to do that and she said “I just saw it in my head.” #tmwyk
Reposted by Christopher Danielson
If you need a new/free puzzle site, I just saw www.ponderclub.co by two indie developers on TikTok. “Thoughtful games for restless minds.” 🫶
December 23, 2025 at 2:08 PM
If you need a new/free puzzle site, I just saw www.ponderclub.co by two indie developers on TikTok. “Thoughtful games for restless minds.” 🫶
Reposted by Christopher Danielson
Needing blue sky networking help:
I am looking for someone with familiarity in Immigration Law who might be willing to talk with me and help me understand the system a bit. In particular I am in need of advocacy advice for a detained family friend. (South Florida specific would be ideal)
I am looking for someone with familiarity in Immigration Law who might be willing to talk with me and help me understand the system a bit. In particular I am in need of advocacy advice for a detained family friend. (South Florida specific would be ideal)
December 22, 2025 at 5:08 PM
Needing blue sky networking help:
I am looking for someone with familiarity in Immigration Law who might be willing to talk with me and help me understand the system a bit. In particular I am in need of advocacy advice for a detained family friend. (South Florida specific would be ideal)
I am looking for someone with familiarity in Immigration Law who might be willing to talk with me and help me understand the system a bit. In particular I am in need of advocacy advice for a detained family friend. (South Florida specific would be ideal)
Reposted by Christopher Danielson
The new weekly email is written! Goes out tonight. Spoiler: I do include a link to the most important Christmas art of my lifetime. Sign up at deardara.com if you want the letter, and click on this link if you want to touch the hem of God.
www.youtube.com/watch?v=OR07...
www.youtube.com/watch?v=OR07...
RUN DMC - Christmas In Hollis (Official HD Video)
YouTube video by RUNDMCVEVO
www.youtube.com
December 21, 2025 at 5:11 PM
The new weekly email is written! Goes out tonight. Spoiler: I do include a link to the most important Christmas art of my lifetime. Sign up at deardara.com if you want the letter, and click on this link if you want to touch the hem of God.
www.youtube.com/watch?v=OR07...
www.youtube.com/watch?v=OR07...
I dunno. Seems like we should taste it before rushing to judgment
December 20, 2025 at 10:17 PM
I dunno. Seems like we should taste it before rushing to judgment
Reposted by Christopher Danielson
It's Day 19 of the ICE occupation of MSP.
Today thousands of Minnesotans poured onto Lake Street to rally in support of our immigrant neighbors and against ICE.
Take a moment to look at this crowd of you and your neighbors rallying in below zero windchill.
📸 @roblevine82.bsky.social
Today thousands of Minnesotans poured onto Lake Street to rally in support of our immigrant neighbors and against ICE.
Take a moment to look at this crowd of you and your neighbors rallying in below zero windchill.
📸 @roblevine82.bsky.social
December 20, 2025 at 8:52 PM
It's Day 19 of the ICE occupation of MSP.
Today thousands of Minnesotans poured onto Lake Street to rally in support of our immigrant neighbors and against ICE.
Take a moment to look at this crowd of you and your neighbors rallying in below zero windchill.
📸 @roblevine82.bsky.social
Today thousands of Minnesotans poured onto Lake Street to rally in support of our immigrant neighbors and against ICE.
Take a moment to look at this crowd of you and your neighbors rallying in below zero windchill.
📸 @roblevine82.bsky.social
Reposted by Christopher Danielson
Have some free time over the next couple weeks? You have less than a month to submit your work to the Desmos Art Contest! Head to desmos.com/art for more information, and be sure to hit submit before January 15th, 2026. #mathsky #iteachmath
December 19, 2025 at 9:28 PM
Have some free time over the next couple weeks? You have less than a month to submit your work to the Desmos Art Contest! Head to desmos.com/art for more information, and be sure to hit submit before January 15th, 2026. #mathsky #iteachmath
that sweet sweet six-fold symmetry!
Thank you @desmos.com for my amazing snowflake socks. I appreciate being a part of your community!!! #MTBoS #ITeachMath
December 19, 2025 at 3:27 PM
that sweet sweet six-fold symmetry!
Reposted by Christopher Danielson
Today, my book is the #1 New Release in "Discrimination and Racism." Pre-order now! Great delayed-gratification holiday gift! (Link is to Amazon since that's where the #1 rating occurs, but you can also find the book on Bookshop.org, Barnes and Noble, and Princeton University Press).
Unlocking Justice: The Power of Data to Confront Inequity and Create Change
Unlocking Justice: The Power of Data to Confront Inequity and Create Change [Topaz, Chad M.] on Amazon.com. *FREE* shipping on qualifying offers. Unlocking Justice: The Power of Data to Confront Inequity and Create Change
www.amazon.com
December 19, 2025 at 2:48 PM
Today, my book is the #1 New Release in "Discrimination and Racism." Pre-order now! Great delayed-gratification holiday gift! (Link is to Amazon since that's where the #1 rating occurs, but you can also find the book on Bookshop.org, Barnes and Noble, and Princeton University Press).
Reposted by Christopher Danielson
"My most daring idea is to refuse."
YES.
YES.
"This promise of an AI future, is really just a collective anxiety that wealthy people have about how well they're gonna be able to control us in the future."
- @tressiemcphd.bsky.social with an absolute mic drop moment about AI bullshit.
Incredible words.
Listen to all of it!
- @tressiemcphd.bsky.social with an absolute mic drop moment about AI bullshit.
Incredible words.
Listen to all of it!
December 19, 2025 at 2:13 PM
"My most daring idea is to refuse."
YES.
YES.
The nonsense! "We are an energy company" is equally true of Delta Airlines. What are we doing here, people?
www.npr.org/2025/12/19/n...
www.npr.org/2025/12/19/n...
Why some Bitcoin mining companies are ditching cryptocurrency for AI
Some Bitcoin mining companies are turning away from cryptocurrency and embracing artificial intelligence. NPR's "The Indicator" podcast explains why.
www.npr.org
December 19, 2025 at 1:47 PM
The nonsense! "We are an energy company" is equally true of Delta Airlines. What are we doing here, people?
www.npr.org/2025/12/19/n...
www.npr.org/2025/12/19/n...
the W case is amazing
Your lips only touch for four letters of the alphabet.
December 18, 2025 at 3:22 PM
the W case is amazing
another day, another snowflake with 8-fold symmetry
December 17, 2025 at 3:01 PM
another day, another snowflake with 8-fold symmetry
Reposted by Christopher Danielson
SLMath and @slj.com congratulate the 40 U.S. Title I school libraries who have been named 2025-26 Mathical Collection Development Award Winners! The #mathicalbooks awards are generously supported by the Guru Krupa Foundation. Learn more: www.mathicalbooks.org/2025/12/2025...
December 16, 2025 at 6:32 PM
SLMath and @slj.com congratulate the 40 U.S. Title I school libraries who have been named 2025-26 Mathical Collection Development Award Winners! The #mathicalbooks awards are generously supported by the Guru Krupa Foundation. Learn more: www.mathicalbooks.org/2025/12/2025...
Reposted by Christopher Danielson
this 1927 story about citrus hybrids is nuts. one, it tells of the birth of the tangelo, which seems incredibly old-world and fussy and for which I am grateful today, and also it casually mentions the passing of the entire lime market, because saloons are outlawed.
www.nytimes.com/1927/10/23/a...
www.nytimes.com/1927/10/23/a...
NOVEL CITRUS FRUITS CREATED BY SCIENTISTS; Department of Agriculture Experts Have Bred a New Group That Promises to Be of Great Economic Value -- Experiments Began Nearly Forty Years Ago (Published 19...
www.nytimes.com
December 16, 2025 at 5:51 PM
this 1927 story about citrus hybrids is nuts. one, it tells of the birth of the tangelo, which seems incredibly old-world and fussy and for which I am grateful today, and also it casually mentions the passing of the entire lime market, because saloons are outlawed.
www.nytimes.com/1927/10/23/a...
www.nytimes.com/1927/10/23/a...
Insults and snowballs!!
December 16, 2025 at 2:23 PM
Insults and snowballs!!
Twin Cities! That sky right now!!!!
December 14, 2025 at 10:41 PM
Twin Cities! That sky right now!!!!
Reposted by Christopher Danielson
Eli, founder and CEO of Desmos Studio dropped by for this week's episode where we talk about recursion and chaos. We had so much fun that this is just part 1! youtu.be/0JLRmP-F03Q?...
Recursion and Chaos in Desmos with Eli part 1
YouTube video by Graph Time with Sara & Sean
youtu.be
December 14, 2025 at 9:33 PM
Eli, founder and CEO of Desmos Studio dropped by for this week's episode where we talk about recursion and chaos. We had so much fun that this is just part 1! youtu.be/0JLRmP-F03Q?...
I don’t know if y’all play Strands but please do think of me today if you do
December 13, 2025 at 9:58 PM
I don’t know if y’all play Strands but please do think of me today if you do