iiinova — where your digital self keeps evolving

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Niall Harbison @niallharbison.bsky.social · 13/09/2026

Live stream of our run of 120km to build a hospital for street dogs. We are 90km in absolute bits but we can maybe make it… www.youtube.com/live/K44RPa-...

youtube.com

Crossing the Finish Line for Tina's Hospital

YouTube video by Happy Doggo

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Colin Foster @colinfoster77.bsky.social · 08/09/2026

This short video uses animations to show that the exterior angle sum for any triangle is 360 degrees: www.twominutemath.org/gallery/exte... Go to the website to view 160+ short videos for school and beginning university mathematics - all free to use however you wish. #MathEd #ukmathschat

twominutemath.org

What is the sum of the exterior angles of a triangle? – 2-Minute Math

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 04/09/2026

AI Overview: The Collatz sequence starting at 334 takes 68 steps to reach 1. Is there anything else that I should notice?

AI has generated the Collatz sequence starting at 334.
AI has automatically replaced the number 911 with ‘emergency services’

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Amanda Austin @draustinmaths.com · 02/09/2026

It's back to school this week for many, so this is your annual reminder about draustinmaths.com. There are now over 1200 free maths resources, including over 100 resources for A-level Maths and Further Maths. And when you've exhausted all of those, there are a few paid-for resources too!

draustinmaths.com

Maths Teaching Resources | Dr Austin Maths

Dr Austin Maths is a free-to-use Maths teaching resources website, focussing on quality resources for KS4 IGCSE and GCSE Maths.

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 19/08/2026

I gave this question to ChatGPT. It tells me that you’ll need to deduce the time difference before you can determine the journey time 🤔 Can you solve it without knowing the time difference? Let me know in the comments.

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 18/08/2026

Some holiday maths 🙂

Imagine you go on a fictitious international train journey between the UK and Country X. Assume there is only one station in each country.

Monday: UK → Country X

Departs: 10:30am (UK time)
Arrives: 4:30pm (Country X time)

Friday: Country X → UK

Departs: 11am (Country X time)
Arrives: 1pm (UK time)

The time difference between the UK and Country X is always the same. The journey takes the same amount of time in both directions.

How long is the journey?

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Mr Brassington @mathsenby.bsky.social · 18/07/2026

One of the things I want to improve with as an #ALevelMaths teacher is my knowledge of #physics in order to teach mechanics without just saying "it's magic, right?!" Any recommendations of introductory books/texts for this?

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Sarah Denison @sarahdenisonmei.bsky.social · 04/07/2026

We have absolutely loved having Ayliean speaking at our events - both for students and adults. Strong recommendation from me 😍

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Corbettmaths @corbettmaths.bsky.social · 21/06/2026

Great news! I've finished creating the Emerald 5-a-day for KS1 🟢🎉 corbettmathsprimary.com/5-a-day/ Answers (and proof-reading) will be completed tomorrow ✅ In addition to Ruby ♦️ and Emerald 🟢 I'll make sure that Diamond 💎 will be added by the end of August. I hope you find these useful 😀

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Trish Greenhalgh @trishgreenhalgh.bsky.social · 23/05/2026

Every summer I repost this article on how to spot drowning. Please read it and pass on. In the last few years I’ve had SIX messages from people who saved a kid’s life after clicking on the link from my feed. slate.com/technology/2...

slate.com

Drowning Doesn’t Look Like Drowning

Drowning is not the violent, splashing call for help that most people expect.

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transum.bsky.social @transum.bsky.social · 13/05/2026

If you are having trouble with the May Puzzle of the Month, I have produced this interactive version to help you. There is also an opportunity to extend the puzzle and turn it into an investigation, so pull up a chair at the circular table and have a go. www.transum.org/Maths/Invest...

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Jonathan Hall @studymaths.bsky.social · 07/05/2026

In "broken calculator" style, find angle x, but your sin button is bust. Tried a few of these types of questions with Y10 earlier this week. #MathsToday

A right angled triangle with hypotenuse 14 m and short leg 6 m. The angle between the hypotenuse and other (unlabeled) short leg is x.

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transum.bsky.social @transum.bsky.social · 07/05/2026

Hang the treasure sacks on the balance beam. The objective is to get the beam to balance (multiplying weights by distances). Mental Maths and problem solving. Have a look: www.transum.org/Intro/?ID=1169 #mathsresources #mathschat #mathstoday #mathchat

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Science X / Phys.org @sciencex.bsky.social · 20/04/2026

MathNet, the largest dataset of Olympiad-level math problems and solutions, now offers over 30,000 expert-authored problems from 47 countries, spanning four decades and 17 languages.

phys.org

World's largest collection of Olympiad-level math problems now available to everyone

Every year, the countries competing in the International Mathematical Olympiad arrive with a booklet of their best, most original problems.

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Dr Dan Jones @hookean.bsky.social · 13/04/2026

The vanishing pencils 🙂 #iTeachPhysics #Science 🧪 youtube.com/shorts/ACVk8...

youtube.com

The vanishing pencils

YouTube video by Hookean Physics

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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 19/03/2026

I'm enormously happy to finally be able to announce the date of the #BeachSpectres project: 7th June, 2026. #WhitleyBay beach, UK. If you can make it to the beach and join in with the tiling effort, I'll be very happy to see you and glad of the help! Lots […] [Original post on mathstodon.xyz]

Poster: Beach Spectres, we want to make the largest aperiodic tiling ever!
What's an aperiodic tiling?
It's when you cover a ﬂat surface with copies of a shape like the one above,
without any repeating patterns. The Spectre monotile was only discovered in
2023, and mathematicians are really excited about it!
What are you doing?
We're going to use large “cookie cutter” tools in the shape of the Spectre to
cover the beach with the aperiodic tiling.
You can help: come to the beach and we'll show you what to do.
Where and when?
Whitley Bay beach, 7th June 2026.
Come and join in, just watch, or talk to some very
enthusiastic mathematicians!
beachspectres.com

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 24/02/2026

Have you discovered proudofus.co.uk ? Video link below.

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 19/02/2026

The Mr Barton Maths website has just had a massive update. Please share this post. @mathsjem.bsky.social @susanwhitehouse.bsky.social

The Mr Barton Maths website has just had a massive update.

https://mrbartonmaths.com/

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 12/02/2026

Does anyone please have a list of the proofs that students need to learn for Pearson EdExcel A-Level maths? 🙏 @themathsbazaar.bsky.social @susanwhitehouse.bsky.social

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UK Maths Trust @ukmathstrust.bsky.social · 03/02/2026

Problem of the Week 158! Please do not comment the solution so others can work it out too. Instead, like this post or comment a thumbs up if you think you have the correct answer! The solution will be posted in the comments on Thursday afternoon. #Problem #UKMT #Maths

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transum.bsky.social @transum.bsky.social · 29/01/2026

Today, 29th of January, is National Puzzle Day in the US. I have just counted and there are 428 free puzzles on the Transum puzzle page. The image below shows some examples. www.transum.org/Software/Puz... I hope you have a very Merry Puzzle Day and a Happy New Conundrum 🌞

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 23/01/2026

We’re enjoying this from henkreuling.nl Location will be shared below.

A game from Henk Reuling where the player has to identify the Modulus graph displayed.

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transum.bsky.social @transum.bsky.social · 12/01/2026

PIN Possibilities is a new combinatorics activity in which pupils work out how many different PIN codes are possible under a range of rules and constraints. www.transum.org/Intro/?ID=546 #mathsresources #mathschat #mathstoday #mathchat

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Susan Whitehouse @susanwhitehouse.bsky.social · 09/01/2026

Those of you who teach the topic of circular motion in A level Further Maths Mechanics, do you use the term 'centripetal force'? It doesn't seem to be mentioned in the specifications I've looked at, though it is in A level Physics specifications. #ALevelMaths

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Adam Kucharski @adamjkucharski.bsky.social · 30/12/2025

Want a 2.5 minute primer on the ingenuity of randomised controlled trials? Of course you do.

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 30/12/2025

Congratulations to Dr Chris Pritchard OBE @scottishmaths.bsky.social on the award of his OBE for services to Mathematics Education. Well deserved!

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 30/11/2025

This is a maths 🆘 Please send help! In the grid, we can see exactly one multiple of 5 in each column. If I generalise the grid method for a coprime positive integer pair a and b with a<b we will have a columns and b rows. How do I prove that there is only one multiple of b in each column?

Using the @howiehua.bsky.social grid method to calculate the Frobenius number of 3 and 5.

The interactive number grid is from @transum.bsky.social
https://www.transum.org/maths/activity/number/grid/

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Glenn Waddell, Jr. Ph.D. @gwaddell.bsky.social · 20/11/2025

Longshot question for my network. Is anyone in Hong Kong? I am looking for a book, and one copy exists in the world, in a library in Hong Kong. search.worldcat.org/title/513774... They won't even photocopy the table of contents for me. #FindABook #iTeachMath #LostBooks

search.worldcat.org

MATHGRAF : functions to pictures | WorldCat.org

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Corbettmaths @corbettmaths.bsky.social · 18/11/2025

Corbettmaths 5-a-day Workbooks - the perfect resource for daily maths practice. ⭐️ 6 months worth of 5-a-days & their answers in an A4 book 📚 There are books to support GCSE Higher, GCSE Foundation & even Numeracy 🎉 From only £8.99 including delivery corbettmaths.com/books/

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Graph Time with Sara and Sean @graphtimesarasean.bsky.social · 14/11/2025

Hey all! We've got a new episode of Graph Time with Sara and Sean for you today! Sara and I were playing with some graphs and discovered a really fun way to create tons of beautiful mathematical patterns. Check out the episode: www.youtube.com/watch?v=7v0J...

youtube.com

Discovering Beautiful Mathematical Patterns

YouTube video by Graph Time with Sara & Sean

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 14/11/2025

Something for the weekend? A game of innies and outies.

A game of Killer Suduko with Difficulty ‘Expert’. The expert grid is always empty at the start. The usual rules of Sudoku apply. The rule of 45 might be helpful here.

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 14/11/2025

Something for the weekend? A game of innies and outies.

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Glenn Waddell, Jr. Ph.D. @gwaddell.bsky.social · 11/11/2025

I have two books by an author, Keh-Gong Shih, pub in 1996 that are just brilliant! But they are definitely lost. The first is PIctorial Mathematics: Patterns. It is fabulous! full of images like this. He created his own software called Mathgraf which is used to generate the images. #mathart #mtbos

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Corbettmaths @corbettmaths.bsky.social · 22/10/2025

The Corbettmaths 5-a-day Workbooks are the perfect resource for daily maths practice. ⭐️ 6 months worth of 5-a-days & their answers in an A4 book 📚 There are books to support GCSE Higher, GCSE Foundation & even Numeracy 🎉 Only £8.99 including delivery corbettmaths.com/books/

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 23/10/2025

An opportunity to use a ‘zero pair’ in A-Level maths @studymaths.bsky.social Lookey-likey question from @catrionaagg.bsky.social

$We are given the maths question ‘Integrate the fraction with a numerator of x and denominator of x+4 with respect to x’ The numerator x is rewritten as x + 4 - 4, by introducing a zero pair +4 - 4.$

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transum.bsky.social @transum.bsky.social · 20/10/2025

There are a number of ways of expressing the domain of a function and hopefully they're all covered here in this new multiple-choice exercise. Choose the level consistent with your syllabus. buff.ly/DYOELZU #mathsresources #mathschat #mathstoday #mathchat

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benjamin dickman @benjamindickman.bsky.social · 12/10/2025

[digging through my twittxr archives] do you want non-routine quadratic problems? here are 20 💌: www.desmos.com/calculator/d... cc. #iTeachMath #MathSky #EduSky #AlgebraSky

desmos.com

Particular Parabola Problems

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transum.bsky.social @transum.bsky.social · 12/10/2025

Hello @davidkbutler.bsky.social - I had the urge to create (yet another) one-player online game/puzzle based on your Digit Disguises game. I have yet to try it out with students though. www.transum.org/Maths/Puzzle... Thanks so much for all the sharing you do. Have a great weekend!

transum.org

Digimoji

Crack the emoji code by testing equations and spotting patterns.

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The Mystery of the Missing Percentage Sign @annlovesmaths.bsky.social · 19/09/2025

I grew up loving comics, so how am I only now discovering graphic novels? Just finished Muybridge by Guy Delisle. Brilliant. @dandq.bsky.social

The book cover for Muybridge by Guy Delisle.

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MathsWorld @mathsworld.com · 14/09/2025

The Home of Hands-on Mathematics – opening in London in November 2025! Learn more at mathsworld.com

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