Juliet Robertson has a new Circle of Life Rediscovery blog post about outdoor maths: “6 ideas for using syringes in a mathematical way outside”.
“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.”