What is this skill?
A plural noun names more than one. For most words, we just add -s: one dog, two dogs, one cat, three cats. But words that end in x, s, sh or ch need -es, so we say boxes, buses, dishes and benches. The reason is the sound. Try saying "boxs" out loud and the extra syllable that -es adds becomes clear.
The practice mixes the two jobs. A child picks the right plural from three choices, like "One dog, two ___?" with dogs, dog and doges, or "One box, two ___?" with boxes, boxs and boxies. In sorting games, children decide whether each word takes -s or -es: dog, box, cup, dish at first, and later words such as tree, wish, bird, bench, pen and kiss. The hardest sorts mix in tricky ones, like watch, egg, dress, flower, class and hill. A couple of questions have children spell the plural, cats or boxes, after hearing it. This practice sticks to -s and -es. It does not cover plurals that change the word, like mouse and mice, which come later.
Why it matters
Plurals come up in nearly every sentence a child writes, as soon as they write about more than one of anything. Getting this right is one of the first places writing starts to look polished rather than messy. It also teaches a bigger idea: that spelling often follows the way a word sounds when it is said.
The -es rule is a first taste of a spelling pattern with a reason behind it. A child who learns "if it hisses or buzzes at the end, add -es" has a rule that works across dozens of words, instead of a list to memorize.
Common mistakes
- Adding -s to everything: "boxs," "dishs," "benchs." Say the word out loud and listen for whether you can actually hear -s at the end.
- Over-correcting and adding -es to simple words, like "dogges" or "doges." Only the hissing, buzzing and chunky-ending words need it.
- Borrowing -ies from words like baby and babies and writing "boxies" or "foxies." That ending belongs to a different group of words, so say that box and fox play by the -es rule.
- Getting words ending in ss wrong. Glass, dress, class and kiss already end in s, so they add -es. Treat the double s as a signal.
How to help at home
- Sort laundry, toys or groceries into one and many. Ask what you would call a group of those things and how the word changes.
- Make a short list of -es words (box, bus, dish, fox, bench, glass) and look for them around the house.
- Say a word and have your child add the ending before you tell them. Spot-check whether they can hear the difference between "cups" and "boxes."
- Draw a simple picture of one thing, then many, and write the word under each.
Worked examples
These are real questions from the Tutorsaurus plural nouns: -s and -es practice, with the answers worked out.
Example 1
Which ending does each word need?
To sort: cat, bus, book, fox
Answer: Add -s: cat, book · Add -es: bus, fox. Cats and books add -s. Buses and foxes need -es because bus ends in s and fox ends in x.
Example 2
One bus, two ___?
Choices: 🚌🚌 buses, buss, 🚌 bus
Answer: buses. Two buses. Words that end in s add -es.
Example 3
Spell the word you hear.
The app reads this aloud: “boxes”
Answer: boxes. The word "boxes" is spelled b-o-x-e-s. Box ends in x, so we add -es to make boxes.
Printable worksheet (PDF) — one page of questions from this practice that work on paper, easier ones first, with an answer key on page 2. Free to print, no sign-up.