The triangles in these sets are similar - can you work out the
lengths of the sides which have question marks?
A card pairing game involving knowledge of simple ratio.
Use the ratio of cashew nuts to peanuts to find out how many
peanuts Rachel has. What would the ratio be if Rachel and Marianne
mixed their bags?
Use the Cuisenaire rods environment to investigate ratio. Can you
find pairs of rods in the ratio 3:2? How about 9:6?
The Man is much smaller than us. Can you use the picture of him
next to a mug to estimate his height and how much tea he drinks?
An article for teachers which discusses the differences between
ratio and proportion, and invites readers to contribute their own
Read all about the number pi and the mathematicians who have tried to find out its value as accurately as possible.