Different but still fun from Jim Propp: mathenchant.wordpress.com/2026/04/18/s... (exponential v logistic v Hail Mary)

Snake lemma day in topology. Do I show them the clip? www.youtube.com/watch?v=etbc...

new version (5.4) of classic @geogebra.org www.geogebra.org/download scroll down to Classic 5 for advanced features.

Enjoyed Bill McCallum's latest. Some #mathhistory on e, remembering the effect of graphing calculators, and always about math teaching. mathematicalmusings.substack.com/p/seeing-wit...

@kristenacosta.bsky.social I think your blog got hacked

Some dino #dataviz that is begging for a funner graph yougovamerica.substack.com/p/whats-your... (No shade on @today.yougov.com )

Fun history of induction from Pat pballew.blogspot.com/2026/04/math...

Something about this #mathmeme I really like www.tumblr.com/mathhombre/8...

I'm really happy this paper is finally out! It's about a course I taught for many years, and it ties together lots of my favorite and most creative ideas. It also deepens my contribution to the ongoing discussion of the nature of inquiry. [Jump to Section 3.4 for a fun image.]

Nice GV coverage of #ALlogical www.gvsu.edu/forum/view.h... #mathstory

#mathjoke SNL www.youtube.com/watch?v=JXc1...

Just so you know, we're the best.

The Making Of my most recent geometrical art on canvas (new blog post with work-in-progress photos): elkement.art/2026/04/10/c... #SciArt #MathArt

I asked 383 US math teachers if they had enough time to teach all their standards in one year. Here's what they said: robertkaplinsky.com/enough-...

#mathart @nctm.org webinar recording, with lessons based on Klee, Kandinsky and Mondrian. Some overlap with the lesson we're doing Monday with the 5th graders! www.nctm.org/online-learn...

I wish there were structured retrieval practice... for *learning,* not "you mostly know them let's practice." So you miss one? You do it and it shows up again after you do a really well known one. And then again. (I kinda figured out programming this once with arrays.)

#mathgame with dice or an online version.

Super cool #mathart project.

Thabit ibn Qurra's Pythagorean proof by dissection in @geogebra.org by Chris Cambre www.geogebra.org/m/g47z7bkv

WOW. Combo #mathcomic from @zachweinersmith.bsky.social AND @teorth.bsky.social www.smbc-comics.com/comic/sphere...

Oh I published that for a session today at AERA! I should add a wee bit of context. These are the games that work really well in classrooms, focus on math but are also FUN, and have enough supports so that kids at different skill levels can play together. I would love to buy this set of games 4 all!

Rock solid #mathgame recommendations from @mathematize4all.bsky.social mathematizing4all.com/2026/04/08/g...

Love that @nctm.org is having webinars available by search. Listening to a great stats in elementary webinar from Jane Watson, www.nctm.org/online-learn.... She has a 3rd grade activity on variation: learners made playdoh licorice by hand & with a press. Can you think of an easier to enact parallel?

Messing around with fractions for a #mathart project.

States in US by population halves. Which state has the greatest ratio of areas? #dataviz www.tumblr.com/mapsontheweb...

#mathart the ol' function dance thing, but giffed up. www.tumblr.com/meme-ingfulm...

#mathjoke www.tumblr.com/spectracled-...

notice and wonder => choose and make #iTeachMath

Estos dos patrones hexagonales son el mismo pero con los colores alternos. #mathart #geogebra #mathsky

Always feel that Charles Schulz gets kids. peanuts.fandom.com/wiki/April_1... I think he meant to show Charlie Brown not concentrating, but I feel like ol' Chuck is kind of amazing here. #edcomic (Apr 9 1958)

#mathstoday decimal counting circle

Happy Easter to them what celebrate. May His followers follow.

@ibramxk.bsky.social I can't get the notes page for Chain of Ideas to come up in Chrome. Is it up and running somewhere?

Mucking about #mathart @geogebra.org

New mathematical art T-Shirts! Created from my original math art on paper or canvas, digitally inverted ("negative art"). Each drawing has been constructed by hand in a painstaking process, following the rules of descriptive geometry. #MathArt #SciArt store.elkement.art/pages/t-shirts

#mathart amazing from Werner Herzog news.artnet.com/art-world/we...

one of these scores is not like the others puzzlist.com/onewordsearch/

Periodic reminder that sheaves were invented by someone in a prisoner of war camp during the Second World War

Native american #mathgame history www.eurekalert.org/news-release...

Let's learn about the golden ratio

via @ddmeyer.bsky.social's newsletter, Bill McCallum 's newsletter mathematicalmusings.substack.com/p/what-if-th...

#mathart #spiral

#mathgame @polypad.bsky.social for the AIMSSEC Fraction Wall game. polypad.amplify.com/p/EYuhe3euY6... source: aiminghigh.aimssec.ac.za/fraction-wal...

Enter Sierpinski 's Forest Full Version: youtu.be/E0V59QxL7II #mathsky

Fun collection of Escher #tessellation in @geogebra www.geogebra.org/m/tkdgznrq #mathart

#mathart play in @geogebra.org after a quilt. www.tumblr.com/mathhombre/8...

There will be more protests today than any other day in American history. Please join us at your local No Kings event to reject the regime’s brutality at home and abroad: www.nokings.org?SQF_SOURCE=i... #NoKings

@approxnormal.bsky.social www.tumblr.com/jabberding0/...

Here is the NYT obituary: www.nytimes.com/2026/03/25/s...