If bored 6. Take any four digit number (making sure the digits are different) 1. Rearrange the digits from largest to smallest and subtract the same 4 digits arranged smallest to largest away to make a new number 7. Keep repeating this until you get stuck on a number 4. What do you notice? 👀

As my Best Guess folders gain traction, remember that whether they are called Predicted Papers, Practice Papers or Best Guess Papers, they are ONLY practice papers. Until Paper 1 has happened, there is no way to predict or guess what will be on Paper 2. b.link/bestguessgcse b.link/bestguessalevel

The two blue angles are equal. What’s the size of the orange angle?

I really like this graph. Pondering how I could use it in a maths lesson... #MathsToday

Finding missing side lengths is the biggest prerequisite to being able to work out the area of these shapes. Here's a simple Blank is Best to practise this skill. Before you use the slide, consider: What's the minimum number of lengths you must provide? Does it matter which ones you give?

Apologies for the unforgivable error in this slide. I hope @nathanday.bsky.social will still talk to me.

Which calculation do you prefer? Can you explain why they all work?

come and join us in the East Midlands! #mathsconf40

Update: I spent a fair bit of time updating my Examples tool yesterday. I added the ability to replace/hide questions on each side and improved the pen functionality. Here's a visual method for completing the square - a halfway step between algebra tiles and an algebraic method.

Thank you @osmondeducation.bsky.social, can’t wait to get stuck in - it looks great!

Reassuring noises about the planned Mathe Emporium move. I had a great chat today with Pearson, and while the initial announcement was a shock, there's plenty of information about it at qualifications.pearson.com/en/campaigns... If you are concerned email Vicky Wood on [email protected]

GCSE questions, revision grids, all the grade boundaries, exam countdowns, formulae sheets, and more. mathsbot.com/gcse

I love doing this too. I also like to get the students to replicate the cuboid on isometric grid then move onto with just dimensions. They struggle with that bit, but when they get it it's 'wow, miss'. Compound ones are the best..creates so many different views.

We used a really simple Blank is Best slide for nets in #MathsToday. I wrote the dimensions on the cuboid then we tried to draw the net. I suppose it could work in reverse as well.

We spent a bit of time looking at properties of triangles in #MathsToday. Is it possible to fill all the cells? If not, why not?

Wherever possible, I like to check for prerequisite knowledge in a meaningful way. Here's a simple one for completing the square.

First post for the #BestGuess folders 2026: GCSE has exam tips and breakfast warmups A Level has practice papers from @mrsmaths.bsky.social and @drbennison.bsky.social as well as hard-to-find revision resources for Applied, and Further Options b.link/bestguessgcse b.link/bestguessalevel

First bbq of the season today. Toying with idea of flip flops.

I've added a few more features to the Examples tool. My favourite bit is the ability to select objectives and compare them side by side.

#MathsConf40 is on Saturday 18th April completemaths.com/community/ma... I do love a chance to #NetworkLearnShare (as well as a Raffle/TuckShop) Who’s going? Who needs to get a ticket? @mathforge.org @sheena2907.bsky.social @catrionaagg.bsky.social @lasalleed.bsky.social @mrmattock.bsky.social

A few weeks ago, I asked for different ways a student might notice they've made a mistake. I'd now love your ideas for techniques that can students use to check their answers. e.g. - substitute a solution back in to check it works - redo a question with a different method bsky.app/profile/nath...

These are fun to make. Here's an alternative to the traditional column subtraction algorithm. www.youtube.com/watch?v=twqP...

A slight twist to the traditional column method for addition that might help some pupils? youtu.be/F3IIMG_7Tzo

My year 13s are struggling with reverse chain rule, so wrote these as a bridging task before we look at adjusting to get a reverse chain rule result. #MathsToday #ALevelMaths

Due to a relocation we have another vacancy. Do you want to come and teach maths in the beautiful national forest? 🌳 🏡 Come and join a team that love to talk about teaching maths DM if you have any questions share.google/nZ9dKhpLJXwj...

Petition to set out the "bus stop" method like this? (I've spent some time today recording videos for the KS2 arithmetic resource here: mathsbot.com/primary/ks2Mini)

Early morning shut the box in #MathsToday. So good for number bonds and linking numbers to their numerals.

It's nearly here... Fri, 20 Mar 2026, 2:46 pm Point of Inflection Day (aka Spring Equinox) explain it to your students using the updated 2026 powerpoint: www.dropbox.com/scl/fi/5waw7...

Two new transformation worksheets: ✨ Harder reflections practice grid ✨ Negative enlargements practice grid Corrected after my Year 9s found a couple of errors! Find them at www.draustinmaths.com/transformations #UKMathsChat #MathsToday

TIL that if a quadrilateral's angles are in arithmetic progression then it must be cyclic or a trapezium. Easy to show, but I found it surprising. #MathsToday

"The best way to revise maths is to do maths" - Y11 maths teachers around now. This QR code poster generates simple revision grids of 12 questions loosely* tied to GCSE grades. *This will get better over the years. (I'm almost 3 years into the MathsBot curriculum project now)

Minimally different quadratic equations. What patterns can you spot? Which equation should come next?

My 8yo has just spent a significant amount of time flipping 2 bottles simultaneously. I wish I’d gathered data on his success for his LH and RH attempts. There’s definitely a nice tree diagram task in here somewhere.

@drbennison.bsky.social with a great session on using variation in maths lessons. #TTRConnect

@morrismaths359.bsky.social showing off how she uses algebra tiles to collect like terms. #TTRConnect

@dozbilgehan.bsky.social great to meet you today! Make sure to follow @draustinmaths.com - she’s got a really good website you should definitely know about.

The fabulous @studymaths.bsky.social talking to us all about inner and outer tasks… what are you asking the students to do on the surface? But what is the mathematical idea that it really uncovers? #TTRConnect

Is there a better day for a conference and hanging out with maths teachers all day than π Day?! Looking forward to a geeky day at @ttradioofficial.bsky.social Connect in Manchester! 🤩

I've incorporated this into the MathsBot curriculum now. This little video hopefully demonstrates how simple it is to use. www.youtube.com/watch?v=zxMK...

Investigating odd and even numbers.

I've just made a simple one-click revision grid tool. Here are a few examples: Easy: mathsbot.com/revise?min=1... Med: mathsbot.com/revise?min=6... Hard: mathsbot.com/revise?min=9... Mess with the URL parameters to see what else you can make.

Excited to see everyone this weekend! Looking forward to showing off some cool new things I’ve been working on.

Very pleased to see my website 'Goal Free Problems' (goalfreeproblems.blogspot.com) get a mention in this updated @ncetm.bsky.social blog (www.ncetm.org.uk/features/ten...) about the best revision resources for GCSE maths. If you haven't checked them out yet, please do have a look.

Building patterns in #MathsToday with the 4yo. A simple idea but lots of fun.

Just a few days away! Still a few free tickets available.... bsky.app/profile/ttra...

Might be a useful slide for anyone teaching quadratic graphs soon. #BlankIsBest

And here’s a link to Tom Francome’s blog post about the resources blog.lboro.ac.uk/cmc/2024/11/...

So yesterday I was lucky enough to spend some time looking through Don Steward's lifetime of tasks and notes stored at @lborodme.bsky.social In case you're not aware (I wasn't!), these have all been digitised and are available here: donsteward.blogspot.com/p/don-stewar...

Today the inestimable @studymaths.bsky.social led our student teachers on a fab day of insights. It was so good! Including prime factorisation, ratio tables, task design, completion tables and #blankisbest. Wonderful stuff! Thanks Jonny 😁

I used another #BlankIsBest slide this week to introduce angles on the straight line. The bar model underneath each diagram really helped some of my Y7's make sense of the problems I made up. #MathsToday