There are many excellent sources of free Mathematics posters available on various sites.
Jenny Eather’s Maths Charts includes over 200 posters on a wide variety of topics. (Jenny Eather’s dictionary is also excellent).
Nrich have turned many of their excellent problems into attractive posters. Note the link to download a zip file of all the posters.


On Play With Your Math, Joey Kelly and Xi Yu have taken problems and adapted them so in their own words…
everyone (and anyone) can play. We design posters and handouts that hook you visually and explain the problem in just enough words. The problems that we’ve picked require trying, struggling, failing, adjusting, and trying again until, finally, a discovery is made.
The Classic Mistakes site has a wonderful collection of those classic mistakes that teachers regularly see. These posters can be downloaded in colour or black and white, a podcast explaining the mistake is also available for each poster.
Note all the other downloads available from the same site.

The Mathematical Moments site features many downloadable pdfs, posters that show the role that Mathematics plays in Science, Technology and Human Culture. A short or more detailed version of each poster is available and a search is provided.

On TES Resources Owen has created an excellent set of A4 posters inspired by Ian Stewart’s ‘17 Equations that Changed the World‘.
(You will need to register with TES (free) to download any resources).
You can read more about the 17 equations on The World Economic Forum where for each equation we have the following information:
- What does it mean?
- History
- Importance
- Modern use
The equations posters together with this information would make an interesting display.
Now available in 7 additional languages, try this wonderful collection of STEM Role Models posters from Nevertheless.
……
The excellent Maths Careers site includes many posters to download, scroll down the page to see a great collection. Note also the booklet on Where the Maths you learn is used.

Math Gems from Thinkzone has a collection of free posters described as an assortment of mathematical marvels – these won’t use up your colour inks!


Ed Southall’s posters feel particularly appropriate as in 2021 as we celebrated 50 years of Mr Men and Little Miss.
Look at Clarissa Grandi’s display suggestions on her wonderful Artful Maths. I do like the today I’m feeling….idea! Or perhaps, Maths around us which includes a selection of images (all labelled for noncommercial reuse).
On David Morse’s excellent site, Maths4Everyone, we can see he is developing a section on Posters and Displays; in the meantime, there are some available on TES.

From Plus Magazine – a series of posters for display in classrooms.

Also, note lots of Maths for your walls!
For a collection of Numeracy Across the Curriculum posters, have a look at this collection which includes posters on Numeracy for a variety of subjects. I came across these on Twitter; looking at the address, thank you to Inveralmond Community High School.

Note Mark Horley’s comment below, Mark has created a Mathematical Timeline. Mark has made the timeline available as a Word, also pdf document.
I noticed Mark refers to Henry Dudeney on the 1917 and 1940 posters. For puzzle lovers, you can get a free puzzle book by Henry Dudeney, Amusements in Mathematics. I referred to this book on my free books page; having just checked, Amusements in Mathematics is still available free. The first set of puzzles will offer a trip down memory lane for those who remember money – pre-decimal! There are several categories of puzzles available.
From Tomorrow’s Engineers, you will find many careers resources including posters.
MEI (thank you) alerted me to this poster – 100 jobs in STEM!

You may want to make your own signs or posters, try this brilliant Mathematical alphabet from Sarah Carter on mathequalslove.net.

Or if you want any calculator symbols – try Casio’s collection of fonts.
For making your own vocabulary posters, using a word cloud generator such as Word It Out makes the job easy. Simply enter some text and create your word cloud. You can then share your cloud if you want to. It is also possible to embed it on your blog or website.
Note that you can use the tilde (~) character to keep words together.
A great feature for mathematicians – WordItOut can easily cope with the equals sign, division signs also – see for example this equation. It seems other symbols are possible also.
Various options are available, you can change the colours of your words and the background colour, you can also change the size of the font and the variation in size allowed.
Emma made our Year 7 class a poster of the vocabulary needed for our work on shapes and here is a very simple example on Linear Sequences.

Tagxedo is another possibility, this also allows a choice of shape.
….and on a lighter note, my son sent me this from GraphJam.