It's useful to be able count forwards and backwards in 5s. It's much quicker than counting in 1s. There is a pattern when counting in 5s that can be easily seen on a 100 square or number line. Look at ...
An insomniac girl named Clarissa tries counting sheep to fall sleep, but it has the opposite effect: “A loud baa made her open her eyes, and to her surprise, she saw ten sheep in her room.” Counting ...