Justin Lanier
@jlanier.bsky.social
Don’t You Dare Think Pentagons!
December 30, 2025 at 10:10 PM
Don’t You Dare Think Pentagons!
No shape is a square.
Because all shapes are there.
Be there or be square.
Because all shapes are there.
Be there or be square.
November 20, 2025 at 4:04 PM
No shape is a square.
Because all shapes are there.
Be there or be square.
Because all shapes are there.
Be there or be square.
Reposted by Justin Lanier
Moon Duchin on the ‘Mathematical Quagmire’ of Gerrymandering
www.nytimes.com
November 3, 2025 at 12:43 PM
If you teach Year 6 maths in the UK and you'd be willing to Zoom chat briefly with a pre-service teacher in the US for a class project, let me know? Thanks!
November 2, 2025 at 8:55 PM
If you teach Year 6 maths in the UK and you'd be willing to Zoom chat briefly with a pre-service teacher in the US for a class project, let me know? Thanks!
Definitely! Thanks!
October 31, 2025 at 10:03 PM
Definitely! Thanks!
Very cool! Based on the registration form and what I know about other CMC-related events, am I correct in assuming that non-CA folks are welcome to attend? If so I’ll pass along to the pre-service teachers I work with! Thanks! PS enjoying the new pod eps! 👍👍👍
October 31, 2025 at 5:01 AM
Very cool! Based on the registration form and what I know about other CMC-related events, am I correct in assuming that non-CA folks are welcome to attend? If so I’ll pass along to the pre-service teachers I work with! Thanks! PS enjoying the new pod eps! 👍👍👍
“The most beautiful fruit tray you can ever imagine.”
October 28, 2025 at 6:34 AM
“The most beautiful fruit tray you can ever imagine.”
Both give the rating 0/0.
October 17, 2025 at 2:22 AM
Both give the rating 0/0.
Similarly, Pennsylvania's top portion and its exclusive definition. I genuinely thought that was the point of those shapes before I recognized the shapes as state outlines. 😂
October 14, 2025 at 7:41 PM
Similarly, Pennsylvania's top portion and its exclusive definition. I genuinely thought that was the point of those shapes before I recognized the shapes as state outlines. 😂
Funnily enough, the top portion of Ohio might well qualify as a trapezoid by its own inclusive definition! 😄
October 14, 2025 at 7:39 PM
Funnily enough, the top portion of Ohio might well qualify as a trapezoid by its own inclusive definition! 😄
Every bubble is popped on one side of it and raised on the other side. 😜
September 25, 2025 at 1:51 AM
Every bubble is popped on one side of it and raised on the other side. 😜
vghay also pkease
September 17, 2025 at 4:31 PM
vghay also pkease
Or—and hear me out here—give those assignments, if you think they are worth students doing, and make them a completion grade. (Or even, at times, for no grade at all.)
August 12, 2025 at 11:00 PM
Or—and hear me out here—give those assignments, if you think they are worth students doing, and make them a completion grade. (Or even, at times, for no grade at all.)
Reposted by Justin Lanier
I presented on this problem today!
You can find the slides here:
docs.google.com/presentation...
I don't use speaker notes (just vibes) but I think a recorded version exists and I'll try to link to it if/when I can.
cc #iTeachMath ♾️ bcc #MathSky 🧮
You can find the slides here:
docs.google.com/presentation...
I don't use speaker notes (just vibes) but I think a recorded version exists and I'll try to link to it if/when I can.
cc #iTeachMath ♾️ bcc #MathSky 🧮
August 8, 2025 at 11:23 PM
I presented on this problem today!
You can find the slides here:
docs.google.com/presentation...
I don't use speaker notes (just vibes) but I think a recorded version exists and I'll try to link to it if/when I can.
cc #iTeachMath ♾️ bcc #MathSky 🧮
You can find the slides here:
docs.google.com/presentation...
I don't use speaker notes (just vibes) but I think a recorded version exists and I'll try to link to it if/when I can.
cc #iTeachMath ♾️ bcc #MathSky 🧮
There should also be a new defensive position to prevent baserunners from using this shortcut. A "shortcutstopper" or something.
August 7, 2025 at 6:25 AM
There should also be a new defensive position to prevent baserunners from using this shortcut. A "shortcutstopper" or something.
Reposted by Justin Lanier
Yesterday I spent a fascinating morning talking maths with a group of GPs. All professions require some level of numeracy, but doctors face particular challenges when communicating mathematical ideas.
I've written up a short blog: robeastaway.com/blog/gp-maths
I've written up a short blog: robeastaway.com/blog/gp-maths
July 31, 2025 at 7:50 PM
Yesterday I spent a fascinating morning talking maths with a group of GPs. All professions require some level of numeracy, but doctors face particular challenges when communicating mathematical ideas.
I've written up a short blog: robeastaway.com/blog/gp-maths
I've written up a short blog: robeastaway.com/blog/gp-maths
You are almost—but not quite—off the grid. 😄 Hope you are having a nice getaway!
July 28, 2025 at 8:24 PM
You are almost—but not quite—off the grid. 😄 Hope you are having a nice getaway!
Make more yourself at this link: demonstrations.wolfram.com/TilingTheHyp...
Wolfram Demonstrations Project
Explore thousands of free applications across science, mathematics, engineering, technology, business, art, finance, social sciences, and more.
demonstrations.wolfram.com
July 26, 2025 at 12:34 AM
Make more yourself at this link: demonstrations.wolfram.com/TilingTheHyp...