One More Sheet.

2nd Grade Irregular Plural Nouns Worksheets

Most plurals add -s, but a stubborn set of old words changes instead: mouse/mice, foot/feet, tooth/teeth, child/children, man/men, woman/women, goose/geese. Second graders learn this core set by meeting the words in sentences where the number cue makes the plural unmistakable.

Free printable PDF, aligned to Common Core L.2.1.b. One skill per page, answer key on page two.

Every sheet is one of a kind and prints with a version code, so you can reprint the exact same one later. New version every click.

A sample 2nd grade sheet. Yours will have different sentences. Click it to print your own.

The kind of sentences you'll get

Circle the letter of the correct plural.

  1. Our class tank has nine tiny ______ and one snail. fish · fishes

    Answer: fish

  2. Both pals grinned and showed their missing front ______ . teeth · tooths · teeths
  3. My uncle and two other ______ fixed the back fence. mans · mens · men

Every print draws a fresh mix of sentences at this level, so a make-up test or a second sibling gets a different sheet.

What's on each sheet

Every version prints on US Letter or A4, with its answer key on the last page.

How to teach this

These words are survivors from very old English, which is a fun fact that helps kids forgive them for breaking the rules. Teach the core seven or eight as sight vocabulary, with pictures and counting: one foot, two feet, one child, three children. Saying the wrong form out loud (two mouses!) usually earns a giggle and cements the right one.

Watch for: Some plurals don't change at all: one sheep, five sheep; one deer, three deer. The number word does all the work. Double-marked forms like mices or feets are never right; the changed word is already plural.

Common questions about irregular plural nouns

Which irregular plurals should a 2nd grader know?
The everyday set: mice, feet, teeth, children, men, women, and geese. These cover nearly every irregular plural a 2nd grader will read or write. Fish and sheep, which stay the same, round out the list nicely once the changing words are solid.
My child writes "foots" and "childs." Should I correct it?
Gently, and without worry; it's the same healthy overgeneralizing that produces "goed" and "runned." The child has learned the add-s rule and simply applies it everywhere. Practice with the real forms, plus hearing the wrong ones aloud, sorts it out over a few weeks.

Related worksheets

Ready to print one?

One page, answer key included. A fresh version every time you click.

Aligned to Common Core L.2.1.b. Reviewed by the One More Sheet curriculum team. Content version 68, updated July 2026.