In this KS2 Maths article you'll learn how to convert different units used to measure volume, mass and length. We also have a KS2 Maths quiz and lots of examples ...

LETTER TO THE EDITOR: Conversion to metric system would be wise Mike Meehan, Las Vegas Saturday, Feb. 28, 2009 | 2:02 a.m.

Science News spoke with a metrologist about the metric system’s latest update, which will help scientists interpret exceedingly big and small numbers.