Monthly Archives: November 2013

171. Are you ready for ChrisMaths?

I am … well, actually … the noticeboard is nearly ready. Just needs some tinsel and decorations!


This is the title:


You can download it here: Twelve days of ChrisMaths title

This is one of the snowflake placeholders (for Day 3):


The six point snowflakes are quite easy to make :

  1. Take a square of paper and fold it exactly in half (direction doesn’t matter)
  2. Mark or pinch halfway along the fold – I’ll refer to it as X
  3. Put the folded edge on the 0-180 line of a protractor, with X on the centre
  4. Fold from X along the 60 degree line
  5. Fold the other end from X to the 120 degree line – you now have 6 equal sections
  6. Fold the whole thing in half and get snipping

Each of my snowflakes references a number from 1 to 12 and each day the appropriate poster will be put on top of the appropriate snowflake.

169. Chrismaths 4

On the fourth day of Christmas Maths Sandpit gave to me … another odd problem.


Image credit:

Download the fourth poster here: On the fourth day of Christmas

Note: There is a minimum call solution (6) and a logical call solution (0 – birds can’t use phones)

166. Merry ChrisMaths 1

I’m not going tinsel crazy yet – I’m just giving you, the reader, a resource a bit early to allow for printing and planning. We have a big noticeboard in the Maths Dept and I thought that this year it would be nice to have a temporary Christmas display: Welcome to the ‘Twelve Days of Chrismaths’!


I will be uploading twelve vaguely christmas related, corny christmas posters, starting today. I’m going to put one up each weekday in school, from 2nd December onwards. You might want to make this into a competition and get students to submit solutions to all the puzzles. You might want to use them as a class activity in the last week of term. Whatever you choose to do, come back each day for the next puzzle.

On the first day of Christmas

165. What’s that button do again?

Back in post 73: ‘Calculators: The New Hope’ I discussed using a simple worksheet to identify issues with calculators and to get students to write their own help guide. That worksheet is now available in pdf format: How to use a Calculator. There is also a new link on the original post.


Note: Even if your school doesn’t use that particular make/model of calculator it’s still a good discussion resource or starting point for your own worksheet.