I have to confess that initially I rather stereotypically imagined that it would be a club that only appealed to girls, but the reality surprised me - the majority of the 12 or so regular attendees were boys from Years 7 and 8, many of whom also coloured at home. And it was boys that told me "This is the best club ever! Can you run it every lunchtime?!" They were in charge of getting out the coloured pencils and the folder of colouring sheets, and then they sat down, coloured in, and chatted happily all lunchbreak. So, it was an absolute success, and apart from a little organisation at the start of the year, took no planning at all on my part (result!). If you would like to start your own colouring club you are welcome to use this editable poster to advertise it (click on the middle image for the file; you will need to download the free font 'Back To School').
Mathematical colouring books
Another good colouring book is The Golden Ratio Colouring Book, by Steve Richards (above left, and right). This consists of a series of decorative designs based around patterns formed from the Golden Ratio and Fibonacci Spiral, as well as other mathematical patterns such as the Vesica Piscis, the Flower of Life and the Koch snowflake.
And we mustn't forget the wonderful Altair Design books that many of us will remember from childhood. These have been updated to include patterns based on Islamic geometry, Penrose tiling and sets of colourable postcards. The images below were coloured by my mum, Judith.
Free mathematical colouring resources
Martin Holtham (@GHSMaths) has used his amazing Desmos skills to create a set of stunning colourable images which he has shared on his Mathemart blog here. I particularly like his 'curve of pursuit', left. If you would like to learn how to draw these beautiful spirals yourself there is a set of instructions on my Mathematical art lessons page.
Finally, the talented Devan Matthews (@devan_matthews), a mathematical artist who works with Microsoft Excel, has shared some of his delicate images online for people to colour. He has also created an intriguing set of dot-to-dot maths art pictures.
Here are the links to Devan's sets of images:
Examples of Devan's work are right and below.
I hope you find as much enjoyment in this beautiful selection of mathematical images as I have.
Happy colouring! :)