# Blog

## Archive

Show me a random blog post**2019**

### Jun 2019

Proving a conjecture### Apr 2019

Harriss and other spirals### Mar 2019

realhats### Jan 2019

Christmas (2018) is over**2018**

**2017**

**2016**

**2015**

**2014**

**2013**

**2012**

## Tags

game show probability tennis sport php ternary inline code flexagons braiding arithmetic statistics map projections binary countdown pac-man asteroids books aperiodical big internet math-off twitter a gamut of games golden ratio draughts curvature martin gardner video games go sound python pythagoras captain scarlet polynomials nine men's morris weather station menace chalkdust magazine puzzles bodmas programming approximation electromagnetic field noughts and crosses rhombicuboctahedron error bars craft gerry anderson latex matt parker bubble bobble dates games data christmas radio 4 wool machine learning cross stitch folding paper rugby speed oeis london underground hats golden spiral interpolation people maths fractals dragon curves football propositional calculus palindromes mathsteroids estimation london news the aperiodical plastic ratio mathsjam accuracy final fantasy mathslogicbot triangles manchester science festival graph theory frobel sorting pizza cutting reddit harriss spiral misleading statistics light christmas card european cup dataset raspberry pi national lottery probability logic chess royal baby javascript manchester chebyshev world cup folding tube maps game of life hexapawn coins reuleaux polygons stickers trigonometry realhats geometry platonic solids## Assorted christmaths

**2013-12-23**

Here is a collection of Christmas relates mathematical activities.

### Flexagons

I first encountered flexagons sometime around October 2012. Soon after, we used this template to make them at school with year 11 classes who had just taken GCSE papers as a fun but mathematical activity. The students loved them. This lead me to adapt the template for Christmas:

And here is an uncoloured version of the template on that site if you'd like to colour it yourself and a blank one if you'd like to make your own patterns:

The excitement of flexagons does not end there. There are templates around for six faced flexagons and while writing this piece, I found this page with templates for a great number of flexagons. In addition, there is a fantastic article by Martin Gardner and a two part video by Vi Hart.

### Fröbel stars

I discovered the Fröbel star while searching for a picture to be the Wikipedia Maths Portal picture of the month for December 2013. I quickly found these very good instructions for making the star, although it proved very fiddly to make with paper I had cut myself. I bought some 5mm quilling paper which made their construction much easier. With a piece of thread through the middle, Fröbel starts make brilliant tree decorations.

### Similar posts

Design your own flexagon | Electromagnetic Field talk | Christmas (2018) is over | Christmas cross stitch |

### Comments

Comments in green were written by me. Comments in blue were not written by me.

Add a Comment