Find out more about Outdoor Maths on 21st September!Juliet Robertson has a new Circle of Life Rediscovery blog post about outdoor maths: “6 ideas for using syringes in a mathematical way outside”.

This begins:

“I’ve always used syringes for water play, mark making, as air pumps in technology projects and for having fun in the snow. I’ve always chosen the biggest syringes I could find – 100ml ones.  But this set, a present from a friend, fuelled the mathematical fire within me. Have a close look at the sizes and see what you notice – this is just the sort of thing to ask older primary aged children.

Can you see:

  • The sizes of the syringes, as well as increasing in capacity, are mathematically linked.
  • The numbers in the squares allow you to quickly measure a smaller quantity than the total volume of liquid possible. The three biggest syringes (10, 20 & 50ml) are all multiples of the smallest two (2 & 5ml).
  • The capacity of the syringes are all multiples of 3 – 3, 6, 12, 24 and 60ml. Again this allows for lots of quick mental calculations.”