If the response to our article on the Tiruler is anything to go by, there's a lot of interest in folding-ruler multitools.

H ave you ever noticed that systems of measurement tends to change when you leave the United States? Weight is typically ...

Watch this video from Maths and Numeracy which shows how Snoot, Fin and Plimble compare fractions, decimals and percentages when fuelling their saucer. Fractions, decimals and percentages all have ...