Great etymology video from @robwords.bsky.social

Inflation hitting so hard, it's affecting the percentages

Got to test something new in #mathstoday. Normally, to decide which transformation to linearise a data set, I'd just show a circle of transformations where each quadrant has the options listed. I recently stumbled upon Tukey and Mosteller's bulging rule and ladder of powers and it's /so/ much easier

I think I love it even more than discorectangle

I've discovered some people call it a convex angle, which makes some sense, although it suggests a reflex angle should be called concave. Incidentally, did you know that angles that add uo to 360° are called explementary?

Giving a child a calculator too early doesn’t help them learn maths; it helps them avoid learning maths. Great piece from @amandavande.bsky.social on why fluency must come before function. springmath.org/fluency-befo...

Can't say I'd thought to do this before. #mathstoday

Would appreciate any reposts to try and get to the bottom of this

Loved discussing some excellent maths tasks in @nathanday.bsky.social’s session. Great to have the opportunity to dig into what makes them so good and how they could be adapted. #MathsConf39

I've got an annoying stats problem at the moment relating to seasonal adjustment of time series about calculating seasonal indices over multiple years. It feels very niche, so any insights are appreciated #mathstoday #mathsconf39 #iteachmath #ukmathschat

A very short primer on mixing degrees of arc with degrees of angle for circle theorems. #UKMathsChat #iTeachMath Historically degrees measured arcs and arcs measured angles. This might feel uncomfortable but remember how we measure an angle today … with a protractor … measuring around an arc. 1/6

In #mathstoday, we started conic sections in FP1 with some model-making!

Nice bank of old exam questions

Work in progress - identify the angle in the alternate segment Inspired by my colleague Rushni whose Year 11s were struggling to do such a thing. comments/questions/thoughts welcome #MathsToday

'Theory of Instruction' is a book that every educator should read. carlhendrick.substack.com/p/10-rules-f...

Big day today with the release of the final Year 10 unit plans wrapping up the curriculum portion of the Year 9–10 Mastery in Mathematics project at Ochre Education 🎉 To give you a sense of just how big Year 10 Mathematics is compared to Year 9, let's look at the stats 🔍👀:

Did a couple of the main ones last night so the basic defns and suvat. Not carefully checked and the equations are "rough" but can put a bit more effort in / share the slides file if you want. The aim is to summarise the relationships for review/reflection, not meant to primary learn from.

Finally crossed the finish line! Looking forward to Friday to release this batch of materials

Here are my slides from ResearchEd National Conference 2025 tomneedhamteach.wordpress.com/2025/09/14/m...

Etymology, etymology, etymology! A reasonably complete list of mathematical words. Let me know if I am missing anything :-) www.atulranatutors.co.uk/resources/ma...

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

For those unfortunate enough to be starting back tomorrow... Over the summer Duelling Mathematicians has had a bit of an upgrade. Loads of new question types, game statistics, and design tweaks, but the same frenetic music and sound effects. More to come! interwovenmaths.com/_Duels.html

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

Nerd goals

Not all wrong answers are equal. I used to think students just needed the right information to fix misconceptions but then I read the work of Michelene Chi🧵⬇️

What might be the awarenesses that are needed to succeed in maths later in life? What LACK of awareness prevents people from succeeding in maths? What activities might help a person develop those awarenesses? That's what I want to know.

I don't want a "phonics for maths" and I'm not sure it exists, but I *do* want a "phonological awareness and print awareness for maths".

🧵 Next year my team have requested CPD on using tech in lessons. eg Geogebra/ Desmos/ AI. QUESTION 1. Can you help me by pointing me in the direction of good resources that will help me plan sessions for them on these? I’m not a technophobe but it’s not something I do enough either.

Well this is just ridiculous. In the best possible way.

Sorry! Meant to hunt down the link and then plum forgot! This one: bsky.app/profile/oxfo... It's all about modelling and the difference between interpolation and extrapolation.

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)

For me, this is the key frontier in applying research: the last 10% needed to get it close to meaningful application. With many instructional design strategies, if it's a little bit off, it can be way off.

Was great to see @carlhendrick.substack.com present on Friday. While mostly reinforcing ideas for me, I'm probably going to focus on is more explicitly considering "what is that last 10–20% needed to get this idea?", i.e., what's the bit that actually gets you over the line in understanding an idea

Tag yourself, I'm Statiatics

Starting a large project, need some help: I'm mapping out all the related concepts from pre-calculus through it and probability that would be generally expected for 16-18 yo students. So, functions, equations, anything related to gradient/rates, accumulation, stats/prob. #iteachmath #alevelmaths

I currently have a fairly comprehensive (to-be-organised) list pulled from all current Aus curricula, as well as Singapore, UK, and 1 US. What I would like help with is finding all of the niche ideas, the ones that may have been removed a while back, things that have slipped up to first year uni.

Starting a large project, need some help: I'm mapping out all the related concepts from pre-calculus through it and probability that would be generally expected for 16-18 yo students. So, functions, equations, anything related to gradient/rates, accumulation, stats/prob. #iteachmath #alevelmaths

I do not like AI in Slack I do not like AI on Mac I do not like AI in Zoom I don’t want AI in my room I do not want ChatGPT — please stop, AI, and leave me be! I don’t want AI here, or there; I don’t want AI anywhere! (… okay, okay — had to Seuss it, sorry 😇)

OH NO have to teach constructions next week. Did people here have ideas on how to make it less annoying for everyone but especially me? Trying to remember who it is that loves constructions... @sheena2907.bsky.social ??

📊 There are *so* many chart types out there. Which one should you use for what kind of data and goal? I tried to answer the question in a new blog post (and poster!): www.datawrapper.de/blog/chart-t...

Look, Ma! No small angle or compound angle! #ALevelMaths #MathsToday #UKMathsChat

Using* the most cursed #ALevelMaths Formula in #MathsToday *absolutely not using but fun as a hook for Radians Sector lesson with Y12

Properties of quadrilaterals with Y8. They sort of know this all already but it still always seems like a bit of a slog! Today we did everything on this hierarchical diagram rather than as a list, which I hope made it seem more logical. #MathsToday

First blogpost in about a year: Increasing accessibility in maths teaching jemmaths.wordpress.com/2025/06/08/i...

New blog on the @cambridgemathshub.bsky.social website. Might be of interest to primary and secondary maths teachers. #mathstoday www.cambridgemathshub.org/post/how-to-...

“It is better to fail aiming high than to succeed aiming low. At Spurs we set our sights very high, so that even failure will have in it an echo of glory” Do you think Levy even knows who said that? #COYS

It's Pride Month. I feel like it is important to recognise this in school, especially given recent developments at home and abroad. Here's two ways I'm doing that. LGBTQIA+ Mathematicians (new!): interwovenmaths.com/famous-mathe... Pride Flag Maths activities: interwovenmaths.com/pride-flag-m...

Don’t mind me, I’m just going to practise factorising quadratics…

More Y9 trig #MathsToday: we ditched the tables in favour of drawing multipliers directly onto the triangles. This lesson went pretty well! Still just using sin and cos, and today I kept everything in one orientation as well.

I should start a blog series on these but cba, so here's today's #GainedTaskIdeas for Maths teachers: learn to be more efficient using MS Equation editor, with this handy guide from our friends at @drfrostresource.bsky.social Link: www.drfrost.org/downloadable...