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johngolden.bsky.social
John Golden
@johngolden.bsky.social
1.3K followers 400 following 1.9K posts
math, math x (x ϵ {equity, ed, teacher ed, games, art, comics, foolery}). mathhombre in other places.
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 1d
member of a very small group
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 1d
#Mathober Day 13: sporadic group. It's a monster #mathcomic www.tumblr.com/talkingnumbe...
Post by @talkingnumbers · 3 images
💬 0  🔁 0  ❤️ 0 · Monster Group Such a crazy thing. M, the monster group, is the largest of the 26 sporadic groups. The sporadic groups are all the finite simple groups not members of the four infi…
www.tumblr.com
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 1d
oh, yeah...
Reposted by John Golden
mathematize4all.bsky.social
Rachel Lambert, prof at UCSB, teacher! @mathematize4all.bsky.social · 4d
♾️ So exciting! Article on mathematics and art in @nytimes.com featuring cool art by my favorite mathematician/artist, Edmund Harriss! Check out his piece which is a very cool piece of wood . . .
www.nytimes.com/2025/10/10/s...
Every Artist Has a Favorite Subject. For Some, That’s Math.
www.nytimes.com
2 4 20
johngolden.bsky.social
John Golden @johngolden.bsky.social · 1d
@deltadc.bsky.social @thenanoprobe.bsky.social #wwtch (I can't remember the tag) www.tumblr.com/seeking-know...
Reblog by @seeking-knowledge · 1 video
💬 18  🔁 2417  ❤️ 3553 · PROVING THAT OUR REACH DOES NOT EXCEED OUR GRASP
www.tumblr.com
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Reposted by John Golden
benjamindickman.bsky.social
benjamin dickman @benjamindickman.bsky.social · 2d
[digging through my twittxr archives]

do you want non-routine quadratic problems?

here are 20 💌:
www.desmos.com/calculator/d...

cc. #iTeachMath #MathSky #EduSky #AlgebraSky
Particular Parabola Problems
www.desmos.com
2 9 16
Reposted by John Golden
fractalkitty.com
Sophia (she/her) @fractalkitty.com · 2d
Today - I played with Hermite Polynomials on Radial Graph paper:

codepen.io/fractalkitty...

#mathart #mathober #mathober2025 #codepen #p5js #creativeCoding
Orthogonal Polynomial
...
codepen.io
6 12
Reposted by John Golden
plthomasedd.bsky.social
PL Thomas EdD @plthomasedd.bsky.social · 2d
Teacher Education in (Another) Era of the “Bad Teacher” Myth radicalscholarship.com/2025/10/12/t...
Teacher Education in (Another) Era of the “Bad Teacher” Myth
[Header Photo by CDC on Unsplash] Note I entered the classroom as a high school English teacher somewhat ominously in 1984, an academic year when Orwell’s classic was increasingly assigned bu…
radicalscholarship.com
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 2d
Cramps in my feed! Thanks.
johngolden.bsky.social
John Golden @johngolden.bsky.social · 2d
how do monotonic matrices come up in tiling? mathworld.wolfram.com/MonotonicMat... asking for a friend. #mathober no, ok, it's for me.
Monotonic Matrix -- from Wolfram MathWorld
A monotonic matrix of order n is an n×n matrix in which every element is either 0 or contains a number from the set {1,...,n} subject to the conditions 1. The filled-in elements in each row are stric...
mathworld.wolfram.com
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 3d
A @desmos.com graph for #mathober day 11: orthogonal polynomials. www.desmos.com/calculator/x...
Orthogonal Polynomials
www.desmos.com
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 3d
#mathmeme frankly ashamed this hadn't occurred to me www.tumblr.com/mathhombre/7...
Post by @mathhombre · 1 image
💬 0  🔁 0  ❤️ 0 · Look What They Need via @goldenboyreturns
www.tumblr.com
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 3d
a) congratulations
b) looks cool!
johngolden.bsky.social
John Golden @johngolden.bsky.social · 3d
Loved this HS student's #fractal, so #geogebra'd it up mathhombre.tumblr.com/post/7970450... #mathart
(Mathhombre) Miscellanea
Very nice! The calculations will get a little funky since the rule is a little different for those squares that have larger squares on bothe sides.
mathhombre.tumblr.com
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 4d
I probably won't get a chance to do a #stellation today for #mathober, but I just saw this sweet one! mathhombre.tumblr.com/post/7969831... #mathart
(Mathhombre) Miscellanea
Stellated octahedron in larger stellated octahedron wire frame
mathhombre.tumblr.com
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 6d
#mathstoday
Venn diagram of characteristics of asymptotes and an oblique example Venn diagram of characteristics of asymptotes and an oblique example
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 6d
I'm beginning to think that AI's real threat to education is ending the jobs for which education prepares us.
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Reposted by John Golden
lutzfernandez.bsky.social
Anne Lutz Fernandez @lutzfernandez.bsky.social · 6d
Essential reading.

www.propublica.org/article/educ...
Even as McMahon has shrunk the Department of Education, she’s operated in what she calls “a parallel universe” to radically shift how children will learn for years to come. The department’s actions and policies reflect a disdain for public schools and a desire to dismantle that system in favor of a range of other options — private, Christian and virtual schools or homeschooling.
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 6d
Matthew Inman (The Oatmeal) on AI art theoatmeal.com/comics/ai_ar...
A cartoonist's review of AI art - The Oatmeal
This is a comic about AI art.
theoatmeal.com
5 3
johngolden.bsky.social
John Golden @johngolden.bsky.social · 7d
#unitchat imperial units masterwork www.futilitycloset.com/2025/10/07/e...
Education - Futility Closet
— Uriah Parke, Lectures on the Philosophy of Arithmetic and the Adaptation of That Science to the Business Purposes of Life, 1849
www.futilitycloset.com
johngolden.bsky.social
John Golden @johngolden.bsky.social · 7d
Some impressive 4th grade fraction thinking. #fractionchat #mathstoday
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Reposted by John Golden
triangleman.bsky.social
Christopher Danielson @triangleman.bsky.social · 8d
Also do you know about bulk egg cartons, which often carry the label 2 1/2 dozen?
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Reposted by John Golden
triangleman.bsky.social
Christopher Danielson @triangleman.bsky.social · 8d
Oh! And some with an 18-egg carton might make for a nice denominator shift, plus an additional unit.

3 eggs are 1/4 dozen, but 1/6 of the carton
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johngolden.bsky.social
John Golden @johngolden.bsky.social · 8d
so fun
Reposted by John Golden
malmeida.bsky.social
Marco @malmeida.bsky.social · 8d
not real eggs/cartons but I also used eggs the one time I had to teach fractions
several problems where students have to how many eggs were originally in a case
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