For Valentine’s Day 2026

Checked and updated annually, ideas and resources for Valentine’s Day …
(Whilst some of these resources were created some time ago, they are still ideal for Valentine’s Day.)

A graph with a grid background displaying colourful hearts in shades of purple, pink, and orange, alongside the text 'I love Desmos!' and the signature 'Love Colleen'.
Desmos – math-o-grams

From Desmos, send one of their great math-o-grams to your mathematical friends!


NASA Valentines
For an alternative source of Valentine’s cards, we can turn to NASA!

Alternatively, try this post, also from NASA


From Sarah Hart, on M+a+t+h=Love, we have a whole collection of Valentine’s Day activities.
(Note that you will find further details on the Mobius strip activity below.)


From OCR, we could try this puzzle.
OCR Valentine Puzzle


Transum Valentine Puzzle
Here’s a Valentine logic starter from Transum.


The excellent Maths Careers site is managed and maintained by the Institute of Mathematics and its Applications. If your students wonder where Mathematics is used, they will find plenty of answers here. See, for example, Who employs mathematicians?  

cardioid

For Valentine’s day we have an appropriate article from Maths Careers, did you know that 6 is a kissing number?! And for your Further Mathematicians, What is the equation for a heart?

careers-hearts

Also, from Maths Careers, see this post with instructions on how to make this wonderful pair of linked Möbius hearts.

use-to-create-mobius-hearts

If you wish to get creative and try this, I advise watching the Numberphile video carefully (embedded further down this page), following the instructions worked, as you can see from my creation here! I can verify that unless you follow the instruction to make sure the twist in each strip is in a different direction you will end up with a mess! Quite an interesting mess, but certainly not two hearts!….
valentine-mobius-hearts
Note the Desmos graphs on my strips. I created a file in Word valentine-mobius-hearts (or pdf: valentine-mobius-hearts) with Desmos images in a table. Adding dotted borders to the table gives guidelines for cutting. I began each cut by using the end of a paperclip to pierce the paper.

I printed the document to create my strips and then printed again on the reverse. I then cut out and trimmed the strips so there was no white space at the end – the picture here has been made using strips 10 cells long.


From Numberphile, Professor Ron Graham discusses the Happy Ending Problem and from Dr Emily Riehl, The Stable Marriage Problem. We also have a great Parametric Heart spreadsheet from Think Maths.


This Valentine Relay from Chris Smith is excellent as are all the other relays in this excellent set of resources. You can find more excellent resources from Chris on TES and follow him on Twitter here.valentine-relay


Valentine's Treasure Hunt

From Maths4Everyone, try this Valentine’s Day Maths Treasure Hunt. Students have to work out the costs of gifts, meals and other outings for Valentine’s Day.

You can find a whole collection of Treasure Hunts from Maths4Everyone here.


Also on TES resources, from a favourite TES author of mine, Andy Lutwyche, you will find this Valentine’s card Area and Perimeter problem


From Clarissa Grandi on Artful Maths, a selection of creative Valentine’s Day maths activities, including an origami neat little paper heart, drawing cardioids and plotting parametric hearts, and a slotted paper heart globe 


From Plus Magazine, see their review of Strange Attractors: Poems of love and mathematics which includes the poem, “Where the Kissing Never Stops” by Ann Calandro which the reviewer points out very effectively use mathematical imagery, for tangential curves (“kissing curves”).


A song which has always made me smile from The Klein 4…


Remaining with the loving theme you can express your feelings for WolframAlpha!

I Love YOU

and from the WolframAlpha archives, Computing Valentine’s Day.

Sending Valentine’s good wishes to mathematicians everywhere!……………..

Happy 2026!

Here’s when 2026 starts around the world!

It’s that time of year again, and we can play the 2026 NCTM Year Game in our January lessons. Use the digits in the year 2025 and the operations +, −, x, ÷, sqrt (square root), ^ (raise to a power), ! (factorial), along with grouping symbols to write expressions for the counting numbers 1 through 100. Full rules are here.


And so to the number of properties of 2026…

We can always check Tanya Khovanova’s Number Gossip site for properties of 2026, the common properties of 2026 are shown here. All Number Gossip properties are detailed here.

We see that the title Happy 2026 is most appropriate, as 2026 is a happy number!
Happy Numbers – one of my favourite investigations!


We can also check WolframAlpha for number properties of 2026.

2026 is a semiprime (semiprimes are used in Cryptography), meaning it is the product of exactly two prime numbers: 2×1013. Consulting the Online Encyclopedia of Integer Sequences, we can search for sequences in which 2026 appears as a term, and we see that 2026 occurs in numerous sequences, including sequences connected with semiprimes.

For further number properties of 2026, see Numbers APlenty.


Sarah Carter has several lovely New Year 2026 activities, including a challenge and several puzzles on her excellent M + A + T + H = love blog. You can find all the activities here.


Returning to WolframAlpha we can see what 2026 looks like in historical numeral forms. We could use the various historical numerals examples to learn how Babylonian, for example, numerals work. I have successfully used this as an interesting starter for January lessons.

The Babylonian system was a positional base 60 system, though it interestingly uses ‘units’ and ‘tens’ symbols to create the 59 symbols needed.

babylonian-2017

For more on the Babylonian system, including how fractions were represented, see History of Fractions from Nrich and Ancient Babylonian Numerals from MacTutor.


We could look back and use the excellent MacTutor History of Mathematics from the University of St Andrews, Scotland. We could check today or any day for Mathematicians who were born or died on that day.

The site is searchable in several ways, including the comprehensive index of History Topics.


Teacher Resources on Line

On the subject of dates and the new year, from trol, Teacher Resources on Line, we can make a calendar for 2026, I do like the fold-and-tuck models – no glue required.

Maths White Board

For another source of calendars, including the option to create your own, use Matt Woodfine’s resources on Maths Whiteboard.

We could try this Calendar Calculation from Nrich.


From Quanta Magazine, The Year in Math (2025); the features of Quanta’s video are described as follows:

Video: 2025 marked a historic year in mathematics. Researchers solved a major case of Hilbert’s ambitious sixth problem, proved a sweeping new theorem about hyperbolic surfaces, and settled the longstanding three-dimensional Kakeya conjecture.


Wishing educators and students everywhere a Happy New Year!

An early Ch-risp-mas present!

…from Jonny Griffiths (I just had to use his words for that title!)
A massive thank you from teachers everywhere, Jonny, for your brilliant resources. I have used these for years and love them.

Download a free PDF copy: www.risps.co.ukwhere you can also download all the new files also. Note the Word version, which you could edit if you wish.

As a backup, Jonny has also placed this on Payhip, where it can be downloaded for free.

This update to Jonny’s 40 investigative tasks for A Level is a major revision. Tasks have been made even clearer, errors corrected, and GeoGebra and Excel files added. Navigation is excellent – all from the very clear Contents list.

Jonny Griffiths, RISPS 2026

For each task, you will find lovely, clear teachers’ notes and references to any files available.

More fantastic resources from Jonny Griffiths are available on his website.
I shall be enjoying reading this over Ch-risp-mas!

Mathematical Miscellany #100

Jonathan Hall – Misconceptions

Added to my Misconceptions collection, this brain dump of mathematical misconceptions from Jonathan Hall on Bluesky.


Worked hard on a big revision of my risps. Weeding out mistakes, making tasks clearer, writing Geogebra and Excel files, all with better navigation; look out for the free eBook coming out in January!

therispguy (@jonny-griffiths.bsky.social) 2025-11-17T18:47:07.957Z

Looking forward to this RISP revision from Jonny Griffiths. In the meantime, head to my RISPS page for RISP publications from Jonny Griffiths.

RISPS
From Jonny Griffiths, try RISPS (Rich Starting Points), Open-ended investigative activities for the A Level Pure Mathematics classroom. On the home page, note the helpful index by topic, choose a personal favourite of mine, Risp 21 Advanced Arithmagons, for example, and you will see not only the task but also teachers’ notes.


Andy Lutwyche – Edecel IGCSE, RAG resource

I am always keen to find resources for IGCSE (Edexcel) and was so pleased to find this Topic RAG resource, from Andy Lutwyche on TES. (Andy is a favourite resource author; there are many references to his resources on this blog.) As you can see from the image, all the topics on the IGCSE maths syllabus are listed, and for each, an example is given. Two resources are provided: versions with and without answers. This resource has been added to my IGCSE collection.

Andy has a similar resource for AQA, Level 2 Further Mathematics. This resource is available with and without the Sparx codes. This is available in the Level 2 Further Maths collection.

Andy Lutwyche – AQA L2 Further Maths, RAG resource.

Transum Advent Calendar

With December fast approaching, I have checked my Mathematical Advent Calendars and Christmas resource collections. I will update these as any new resources become available. For 2025, see this post from Matthew Scroggs, Christmas 2025 is coming.