Crayon, desk, classroom — which tool fits?
Some things we measure are tiny. Some are huge. The right tool depends on the size!
A ruler is short — about twelve inches. It's perfect for small things.
A yardstick is longer — three feet long. Good for medium things.
A measuring tape is the longest. It rolls out to measure really big things.
First, a crayon. It's just a few inches long.
The ruler is just the right size. Use the ruler!
Next, a desk. A desk is a few feet across — way too long for a ruler.
The yardstick fits. Use the yardstick!
Last, a whole classroom! That's many, many feet long.
Only the measuring tape is long enough. Use the tape!
Match the tool to the size: small thing, ruler. Big thing, tape. Nice work!