Justin Lanier

Justin Lanier

@jlanier.bsky.social

207 followers106 following140 posts

Justin Lanier reposted

Christopher Danielson
@triangleman.bsky.social

We were invited to read from our books, which I did of course. But first I had some opening words, which I thought I'd share with you here. I'll share video too, once that's available.

Stenhouse Publishers@stenhousepub.bsky.social

🎉 🎉 Congratulations to How Did You Count? and author Christopher Danielson 📚📚 on winning the 2026 Mathical Book Prize. We're thrilled for the math joy that How Did You Count? brings to children, teachers, and caregivers. ❤️ www.mathicalbooks.org/2026/02/2026...

Justin Lanier reposted

Sydney Mathematical Research Institute (SMRI)
@sydmathinst.bsky.social

Applications are now open for our International Visitor Program, open to #mathematicians to visit Aus 🐨 between July '26-'June 27, or March '26-June -27 (Aus/NZ citizens) 📅 Apply by Aug 1, info: mathematical-research-institute.sydney.edu.au/internationa... Please share with your networks 🔁 #MathSky

mathematical-research-institute.sydney.edu.auInternational Visitor Program - Sydney Mathematical Research InstituteIVP August 2023 applications are due 8 August 2023, for July 2024–June 2025 visits (general applicants) & March 2024–June 2025 for Australian citizens/PR & NZ citizens.
Justin Lanier
@jlanier.bsky.social

TIL that we narrowly missing lugging around not only the monikers "imaginary", "negative", "complex", and "irrational" for numbers, but also "fictitious limits". Real glad for that. 😅 from MacTutor's "The real numbers: Stevin to Hilbert"

Justin Lanier
@jlanier.bsky.social

We are two weeks out from the start of "21st century mathematics", a program I run for K-12 math teachers. (Register now!) The program helps teachers connect the math they teach with some math that has been discovered in the 21st century. The program is flexible, free, & online.

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Justin Lanier
@jlanier.bsky.social

We are two weeks out from the start of "21st century mathematics", a program I run for K-12 math teachers. (Register now!) The program helps teachers connect the math they teach with some math that has been discovered in the 21st century. The program is flexible, free, & online.

Justin Lanier
@jlanier.bsky.social

There are lots of chances for teachers to work on problems collaboratively, encounter new math ideas, and grow as teachers and mathematicians in community. We also have a great lineup of guest mathematicians who will visit us and share about their work.

Justin Lanier reposted

NCTM
@nctm.org

"While everyone is glad to have a much-deserved break from the routine of early mornings and late evenings, as teachers we often end the school year thinking about the things we 'just didn’t have time to cover'." Read NCTM President @latrendak.bsky.social's full message here: nctm.link/a3H7t

Justin Lanier reposted

Christopher Danielson
@triangleman.bsky.social

Have you followed along with Math On-A-Stick and wondered what it would take to make this kind of joyful, creative math happen in your locality? Well, let's gooooooooooooooo www.mathhappens.org/math-at-the-...

mathhappens.orgMath at the Fair - MathHappensMath at the Fair MathHappens Foundation is inviting applications for teams to participate in Math at the Fair, a project that aims to build playful and creative math experiences at fairs and similar e...

Justin Lanier reposted

Nalini Joshi
@monsoon0.bsky.social

Are you a mathematics teacher? Would you like a taste of 21st century mathematics? See the link below to join a program for teachers run by Justin Lanier @jlanier.bsky.social —stay for as long as you like, explore with friends, & get your own insights into accessible, deep questions in math

Justin Lanier@jlanier.bsky.social

“21st century mathematics”: a free month-long online enrichment program for math teachers. Info + register: bit.ly/21math2025 Video part 1:

Justin Lanier reposted

Justin Lanier
@jlanier.bsky.social

Hi! In July I'm once again running a program for K-12 math teachers called "21st century mathematics". Its goal is to help teachers to connect math they teach with some math that has been discovered in the 21st century. Pass it along! Info+register: justinlanier.org/21st-century...

justinlanier.org21st century mathematics – 2025An online learning experience for math teachers Registration for the 2025 program is now open! Here is the registration form. Registration will continue through the start of the program in July. Al…
Justin Lanier
@jlanier.bsky.social

Hi! In July I'm once again running a program for K-12 math teachers called "21st century mathematics". Its goal is to help teachers to connect math they teach with some math that has been discovered in the 21st century. Pass it along! Info+register: justinlanier.org/21st-century...

justinlanier.org21st century mathematics – 2025An online learning experience for math teachers Registration for the 2025 program is now open! Here is the registration form. Registration will continue through the start of the program in July. Al…
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Justin Lanier
@jlanier.bsky.social

“The program was so well organized!!! You explained the structure in advance. The materials were readily available. [...] The problem sets were wonderful. The problems were interesting and didn’t assume a lot of background knowledge."

Justin Lanier
@jlanier.bsky.social

If the program is a good fit for you, I hope you'll join in! And please do pass info along to colleagues and through networks so that it can reach folks who would enjoy and benefit from participating. Thank you! justinlanier.org/21st-century...

justinlanier.org21st century mathematics – 2025An online learning experience for math teachers Registration for the 2025 program is now open! Here is the registration form. Registration will continue through the start of the program in July. Al…
Justin Lanier
@jlanier.bsky.social

Hi! In July I'm once again running a program for K-12 math teachers called "21st century mathematics". Its goal is to help teachers to connect math they teach with some math that has been discovered in the 21st century. Pass it along! Info+register: justinlanier.org/21st-century...

justinlanier.org21st century mathematics – 2025An online learning experience for math teachers Registration for the 2025 program is now open! Here is the registration form. Registration will continue through the start of the program in July. Al…
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Justin Lanier
@jlanier.bsky.social

This is the third year of the program and I get more excited about it each time it runs. A couple of past participant quotes: "I have a much better understanding of what mathematicians do and what constitutes the subject of mathematics."

Justin Lanier
@jlanier.bsky.social

Hi! In July I'm once again running a program for K-12 math teachers called "21st century mathematics". Its goal is to help teachers to connect math they teach with some math that has been discovered in the 21st century. Pass it along! Info+register: justinlanier.org/21st-century...

justinlanier.org21st century mathematics – 2025An online learning experience for math teachers Registration for the 2025 program is now open! Here is the registration form. Registration will continue through the start of the program in July. Al…
Justin Lanier
@jlanier.bsky.social

Participation is flexible and there is no fee to participate. Most math we teach in K-12 is at least several hundred years old. There aren't a lot of opportunities for teachers to connect with math as an active field & growing body of knowledge. I'm excited to share this access point!

Justin Lanier
@jlanier.bsky.social

"𝘉𝘳𝘪𝘯𝘨 𝘐𝘵 𝘖𝘯: 𝘐𝘯 𝘐𝘵 𝘵𝘰 𝘞𝘪𝘯 and 𝘞𝘦𝘴𝘵 𝘚𝘪𝘥𝘦 𝘚𝘵𝘰𝘳𝘺 are basically the same movie. They're romeomorphic."

Justin Lanier reposted

Dr. Courtney Gibbons (she/her/xlookup)
@courtneygibbons.phd

Here's the first page of Radical Equations; I hope it grabs your attention! It's available from lots of independent booksellers, and it's available digitally via Kindle and Audible. (Ask your library to get a copy!)

Dr. Courtney Gibbons (she/her/xlookup)@courtneygibbons.phd

It's Black History month. For many mathematicians (especially those who teach), I would say Radical Equations (by Bob Moses and Charles Cobb) is essential reading. It connects the fight for civil rights to the fight for access to mathematics. It's a good book for this month and this year.

Justin Lanier
@jlanier.bsky.social

Advice please: Someone registers for a program I run (through a Google Form) & gives me their email address. But when I try emailing them later, maybe it gets sent to their spam, or maybe they mistyped and I receive an error message back. What's a good way to automate an email confirmation check?