Unexpected email from Jonny Griffiths telling me there's a new 2026 update of his RISPS book, that's great investigations for impressionable A Level students. Download it now from www.risps.co.uk with links to Geogebra and Excel files @jonny-griffiths.bsky.social

Hey #statistics friends, I need help with a question: With single variable data, we typically use MAD or StdDev as measures of variability. Why don't we just use MAE ('mean absolute error') or MSE ('mean squared error') as measures of variability for bivariate data?

“When do our students really understand the algorithms we teach? When they can use them effectively, or when they understand how they work, and can reconstruct them if they forget crucial steps” dylanwiliam137385.substack.com/p/onions #iTeachMath

Is the point of mathematical research to know *what* is true or to know *why* it's true? Emily Riehl lays out a strong argument - and what it has to do with AI - along great advice for the field in @science.org www.science.org/doi/10.1126/...

"Big Tech and data center developers appear to be siting data centers in vulnerable communities...These locations show a troubling trend - they primarily impact working class and Black and Latine communities."

Anyone have ideas about connections between sound/music and trig functions? cc: @averypickford.bsky.social @maria-naturalmath.bsky.social #iteachmath

Humans are bad at big numbers. Which makes it easier for billionaires (and trillionaires) to get away with hoarding wealth. Because most people just can't comprehend how much money that is. So, I appreciate this WaPo effort to help people visualize what ridiculous amounts of wealth really mean.

Math education is complex. It can’t be reduced to single studies or one-size-fits-all claims. NCSM’s new position paper offers a balanced, equity-centered, research-informed alternative—one that honors the real nuance of teaching + learning. Read more → mathedleadership.org/position-papers

Thanks to his new Tesla pay package, Elon Musk could stand to make $3 billion more per year than all 1.4 million elementary school teachers in the U.S. combined. Still wondering if inequality is out of control?

I want to learn more about how (high school) math is used in building AI. Any recommendations? @jedediyah.com @tombutton.bsky.social @dandersod.recursiveprocess.com

Anyone know of an applet that will allow a user to draw a “modified” unit circle (not perfectly circular) and see the periodic function that results from it? Or something similar. cc: @hpicciotto.bsky.social @jlanier.bsky.social @averypickford.bsky.social @benjamindickman.bsky.social

Lovely #oracy work on indices in #MathsToday. We haven't covered negative indices yet but this got them pondering negative indices and considering non integer values for a and b as well as 0 and 1. Looking forward to delving deeper next lesson.

Any #iteachphysics folks have time-lapse still images of falling objects I can use? cc: @afreeparticle.com @meganhg.bsky.social

Trump, who is numerically illiterate -- listen to this clip to see what I mean -- benefits immensely from the numerical illiteracy of the American public

Ok #mtbos hive-mine… Who has a set of thoughtfully sequenced number talks (aim is for 9th graders in an additional support class)?

From Math Gremlins to Belonging Bios, these fun, powerful activities from @lieslmcconchie.bsky.social help develop students’ math identities *and* boost their achievement! 🚀 #MathSky #ITeachMath

Climate change was predicted long before it arrived, thanks to the power of modeling. This Quanta Magazine piece shows how scientists used computer models to understand and forecast the planet’s future. 🔗 www.quantamagazine.org/how-climate-... #MathModeling #ClimateChange #MathEducation

[email protected] has devoted a whole issue to the fundamental science of climate. Can't wait to read this – we hear so much about climate change, but so little about the basic science. Press: www.newswire.com/news/quanta-... Issue: www.quantamagazine.org/how-we-came-...

#Statistics #teaching often focuses on rote learning of mean/median/mode & graph drawing, but this is not what education research says. In fact, since the early 90s recommendations have been remarkably consistent!

What is ‘evidence-informed’ #statistics #teaching? As part of our work reviewing the evidence for #MathsWeekScot we (@honeypisquared.bsky.social and I) have collected a few ideas and links which may be helpful… #ITeachMath

An Immersive New Museum Dedicated to Maths is Opening in London - Featuring Code-Breaking, Experiments, Challenges and more @mathsworld.com secretldn.com/mathsworld-i...

The sad thing is that maths is full of beautiful and interesting things, but schools somehow manage to make it boring anyway.

Hi @comapmath.bsky.social! Question for you: How can someone get started in coaching a math modeling team? Do you (or others) offer any kind of training to support new team coaches?

You can use this tool to find out just how much funding your local district (or any district in the country) will be losing in the new federal budget: "DES MOINES INDEPENDENT COMMUNITY SCHOOL DISTRICT will lose $8,175,391 in federal funding." public.tableau.com/app/profile/... #EduSky #EdChat

Petition by UC Faculty Association for the UCs stand up to Trump govt demands. UCs are a gem, and contribute so much to CA and USA. We need to protect them from gov't takeover/meddling (I cant believe that is an accurate statement!)All can sign! sites.google.com/view/ucstand... #EduSky #AcademicSky

How it started How it’s going Oklahoman School’s superintendent Ryan Walters edition “2 members of the State Board of Ed shocked and mad when they saw a video featuring naked women on the TV in Walters’ office during executive session” nondoc.com/2025/07/25/b...

REVEALED: we identified the operator of an overtly racist X account, "GlomarResponder," as ICE Assistant Chief Counsel James Rodden, based on an overwhelming number of biographical details matched through publicly available documents, other social media activity, and courtroom observation.

These are the first slides I made on Islands.

Playing Mastermind with my 6 year old inspired me to make this in #Desmos. I discovered I'm a lot worse at guessing than I thought! #MTBoS #iteachmath classroom.amplify.com/activity/687...

Platforms could redesign their algorithms to stop promoting the most outrageous voices & prioritise more representative or nuanced content The internet is a powerful tool. But if we let it reflect the world created by the most extreme users, we all suffer. www.theguardian.com/books/2025/j...

1/2 Eleanor Duckworth's reminder: The more intensely interested a teacher is in a student’s thinking, the more interested the student becomes in his or her own thinking. Corollary: The more a teacher just wants to see right answers, the less interested students become in their (or any) thinking.

Calling all Maths teachers! What are some of your all-time great tasks for secondary Maths? Ones that could have their place in any curriculum, one that should be studied in PGCE courses, ones that started whole new genres of tasks... ... or just ones you really like. (see some of mine below)

I know some people are super jazzed about ‘data science,’ but a basic intro to graph theory, linear algebra, and probability seem increasingly important topics for high school mathematics, to me. What do you think? #mtbos #edusky #iteachmath

Anytime someone you know mentions using ChatGPT or any other genAI, say "you know, I read this article about how incredibly bad for the environment genAI is" and refer them to this article.

CATO: “New nonpublic data from ICE indicates the government is primarily detaining individuals with no criminal convictions of any kind… 93% had no violent convictions… 65% no criminal record at all…” @MarshaBlackburn www.cato.org/blog/65-peop...

Hi @jlanier.bsky.social ! Is your 21st Century Math group meeting every day during the four week window? Or only certain days? And, if someone wanted to join for part of that time but not all, do you have an outline of what you’ll be doing at various points?

pure evil #ProtectTransKids

In the spring of 2008, I feared America was on the verge of war with Iran — and, believing that it’s good style to get to know people before you bomb them, I made “Rick Steves’ Iran,” a one-hour special that could (and would) only debut on PBS. Sadly, this special has become pertinent again today.

NEW post: The Illusion of Thinking fawnnguyen.substack.com/p/the-illusi...

NEW post: The Breakfast Club fawnnguyen.substack.com/p/the-breakf...

I made a tiny tune in #desmos calculator! @desmos.com

The skills I worry the most about - judgment, critical thinking, nuanced communication, logical reasoning - are very hard to capture in a standardized test.

If you have ever felt that 200cc in Mario Kart 8/Deluxe is much faster than it should be, your suspicions are correct. Based on the formula followed by the other engine classes, the speed the game pretends is 200cc is actually 415cc instead.

Many of us who read Project 2025 have been saying from the start that The Regime has a unifying goal of destroying US scientific infrastructure and causing the collapse of Universities. We were called “hysterical”. www.nytimes.com/interactive/...

BREAKING: A federal judge has blocked the Trump administration from dismantling the Department of Education and ordered the administration to reinstate employees fired in a mass termination. This can't happen without cnogressional approval, she ruled. storage.courtlistener.com/recap/gov.us...

Was there any disclaimer that it was written using AI? Is that required if journalists? bsky.app/profile/jaso...

I spoke to the person who AI-generated the Chicago Sun-Times reading list. Says he's very embarrassed. This was part of a generic package inserted into newspapers and other publications, so likely to run elsewhere. He didn't know it'd be in Chicago Sun-Times www.404media.co/chicago-sun-...

At least the flat-earthers aren't in a position to kill people with their ideological idiocy

The comment period for this ends in 3 DAYS. Please leave a comment telling them EVERYONE should be able to get covid boosters. www.regulations.gov/commenton/FD...