I'm teaching a course on Math and Democracy this year, so I've decided to debrief what we do week by week. Here's week 1: jclevelandtran.com/2025/09/16/d... #MTBoS #iTeachMath #iTeachCivics

#MathsToday Introduced the idea of a domain with a few examples and then used this. It worked well! I felt it helped them get a ‘feel’ for things rather than getting stuck in computation. I want to build in some generalisation next lesson to have any square with a vertex on the origin. 1/2

#extrapure first (virtual) lesson of the course. Short overview, some set theory basics using a visualiser, defn of binary operations. On to modular arithmetic. Chat blast questions work nicely to set the pace. I will try to post each week with a summary. #alevelmaths

Picard's theorem (not, not *that* Picard): an object in a free-flowing river has no free will. #MathSky #UKMathsChat #ITeachMaths

Stealing. #MathSky #UKMathsChat #ITeachMaths

Since the date is a bit triangular, it seems like a day to repost some of my ruminations on lengths and right-angled triangles. #MathsToday #MathSky #UKMathsChat #ITeachMaths

Awesome!

I popped into a maths workshop yesterday because I saw some people I recognise through the window. At one point the tutor said to a student: “Are you seriously using ChatGPT right now, when I, your human tutor who can answer your questions, am right here?!”

Math[s] friends! I have learnt of the travesty that is varpi. I have seen it and can only bear the knowledge of its existence by inflicting it on everyone else, so here it is: ϖ Naturally, I have questions. #MathSky #MathsToday #ITeachMaths #HoagieHomies

Books I would like to write: 1. Too many solutions by Andrew Stacey with not enough diagrams by Catriona Agg 2. What I wish I'd taught in Maths

New! My 192nd gems post. Ideas, updates and resources for maths teachers. 💎 www.resourceaholic.com/2025/09/5-ma... Hat tips to follow. #mathstoday #ukmathschat #alevelmaths #iteachmath

My favourite thing about the maths teacher community on Bluesky is #MathsToday. If you’ve not joined in before, I can really recommend it. Posting a highlight of your day is very uplifting! I’ve kept forgetting this term, though, so going to attempt a week’s worth in one go…

I have put a mince pie in my lunch for tomorrow and I don't care who knows.

NEW BLOG: The Wizard of AI www.emaths.co.uk/blog/general...

Cool paper out by mathematicians studying population dynamics with algebraic geometry @georgysch.bsky.social @mpi-cbg.de @csbdresden.bsky.social @math-mpicbg.bsky.social

Holding a Clubs/Societies/Enrichment Fair for your school or college? The National Cipher Challenge might be just what you need. Here is a poster you can use to promote it! The site will open for registration on Sept 18th and the competition starts Oct 9th. Challenges weekly throughout term!

Today at #TMiP25, I'm at @TeaKayB#tmip25s session on maths in museums. (You should hire him.)

This just flew past me on some sort of aggregation list. Anyone listening to @sparksmaths.bsky.social yesterday at #TMiP25 might find it eerily familiar! theconversation.com/despite-a-le...

Alas, poor Rupert! #UKMathsChat #mathsky

I have been doing Paddy's problem solving questions every day this summer, and I have found a lot of them challenging. As well as enjoying them very much, they have helped me focus on how I teach problem-solving. Here are the top five things that I have come away with. #ALevelMaths

Feels more like a channel 4 program than bbc, but good to see that the water companies are trying different things to clean up their pipes.

#CoreMaths? Definitely #UKMathsChat Is there a UK version of the report card?

1. The Flags have arrived in my area. They make me uneasy. It isn't I have a problem with them when we're celebrating something. Football. Olympics. Even a royal wedding. But right now they don't *feel* like a positive affirmation of stuff we like but more a protest against things people don't..

Maths teachers - I published three blog posts in August that you may have missed: www.resourceaholic.com 1. GCSE Stats resources 2. Maths Gems 191 3. The Option Block Experiment

I give you the problem "Reverse Hundredface", where you imagine you don't know how long each of the Cuisenaire rods is and have to figure it out from the ALT text of four Hundredface pictures.

MATHS TEACHERS: If you’re seeking ways to add quirky ‘real world’ maths to lessons next year I’ve updated my blog index robeastaway.com/blog/blog-in... . You can use it to find odd applications of (say) quadratic equations. It’s the sort of thing you might use as a lesson starter (1/3) #TMiP25

There was a recent thread on pedantry in mark schemes, which prompts a thought on pedantry in mathematics. In brief there are two sorts, one good, one a pain. A friend says mathematicians are creative pedants, ...

"What the tumbledryer hath bound together, let not man put apart."

Just gave this a rather significant visual upgrade. It's now quite colourful, matching the textbooks! I've also added in totals, but they tend to be off by a couple of marks from the official ones as they are just the sums of the notional component boundaries. interwovenmaths.com/_GradeBounda...

It's really the antilog table that I remember, based log(2) = .3 to great accuracy, so antilog(.3)=2 antilog(.6)=4 antilog(.9)=8 antilog(.2)=1.6 antilog(.5)=3.2 antilog(.8)=6.4 antilog(.7)=5 antilog(.4)=2.5 antilog(.1)=1.25 This improves Fermi estimating from order of magnitude to 1 sig fig

Gosh where to even start! 🤯Jupiter and Venus are very far away from Earth. They are definitely not shining in front of the moon! 😂 ↙️ Yes Jupiter & Venus are close in the sky today if you're awake at ~4am, but tonight the moon is far off to the right. 🤓 On Aug 20th they'll be closer ↘️ 📷:Stellarium 🔭🧪

Where Lucy Bronze leads, others follow: 'She also spoke about her love of numbers and dates. "I love math stuff," she said, saying 13 was her favourite number.' www.bbc.co.uk/news/article... #UKMathsChat #mathsky

Grade boundary links: Edexcel: qualifications.pearson.com/en/support/s... OCR: www.ocr.org.uk/administrati... AQA: www.aqa.org.uk/exams-admini... Emporium: mathsemporium.com/category/gce... & Further: mathsemporium.com/category/gce...

Keeping this post, Exam Results, 2025 up to date...

Mmmm, bagels ... #mathsky #UKMathsChat

@tmip.bsky.social Your animation submission form doesn't list the August prompt (unless it's a broken cache on my end). (Sorry, can't DM you as I haven't yet age-verified myself!)

This month's @tmip.bsky.social animation is Hilbert curves. Here's my attempt. #mathsky #UKMathsChat youtu.be/1_cqgEz5Xbo

Witchcraft, physics, same thing

#mathsky #UKMathsChat #ITeachMaths

Reposting as I know that radianators tend to be morning people. #mathsky #UKMathsChat

Debugging an animation, an angle just seemed to not be right no matter how I added the contributions to it ... turned out it was a degrees vs radians issue. @#£%^&* radians ... they can just get in the bin. Absolutely useless. #radiangate

When you (and especially, when _I_) don’t have a clear understanding of something, the best approach is to read what Emily Riehl writes about it. #MathSky www.scientificamerican.com/article/math...

I'd've believed this was genuine if the toaster had been saying "Howdy-doodly-doo" in the last frame.

I often find it difficult to remember song lyrics, but there is one song that I do know in full. It's oddly comforting.

"I hold your hand in mine, dear. I press it to my lips. I take a healthy bite from Your dainty fingertips.

Now *this* is what unicode is for.

www.bbc.co.uk/news/article... Cue all the jokes about PhD students! Also, the phrase "Piled higher and deeper" has never felt more apt.

What's the hashtag for #MathFails ? And given that one of the original Pooh stories is SOOO much about circumference - and the difference between the circumference of Pooh and of Rabbit's door - it's especially egregious.

I have a query about one of @catrionaagg.bsky.social 's puzzles. The goal is the area of the red quarter circle. I have a solution that *doesn't* use the semi-circle. Am I missing something, or is that semi-circle irrelevant? #geometrypuzzles notes.mathforge.org/notes/publis...