Or search by topic
This girl is being measured in a different way, with a friend helping her. Do you think measuring using this method looks easy or difficult?
What things in the pictures might they be finding hard?
Can you find a better way to find out the height of a friend?
What will you use? Try it and see how tall they are.
Can you give answers in metres as well as centimetres?
Use your hand span to measure the distance around a tree trunk. If you ask a friend to try the same thing, how do the answers compare?
This article, written for students, looks at how some measuring units and devices were developed.