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Irregular nouns

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Free printable Irregular nouns worksheets for 3rd grade. Students practice the plural forms of irregular nouns — words like child/children, mouse/mice, and foot/feet — that do not follow standard plural rules. Mastering irregular nouns is essential for correct grammar and spelling in 3rd grade writing. Part of our nouns worksheets collection.

What You'll Learn

  • Recognize irregular plural nouns that do not follow -s rules
  • Identify irregular forms such as children, feet, and mice
  • Apply irregular plural nouns correctly in reading and writing

FAQ

What are the most common irregular nouns covered in 3rd grade worksheets?

Common irregular nouns at the 3rd grade level include child/children, man/men, woman/women, foot/feet, tooth/teeth, mouse/mice, goose/geese, and ox/oxen.

How do students best memorize irregular noun plural forms?

Repeated practice through matching, fill-in-the-blank, and sentence writing activities helps students commit irregular plural forms to memory — these patterns must be learned by sight rather than by rule.

Why do irregular nouns cause errors in 3rd grade student writing?

Because irregular nouns do not follow the -s/-es rule, students who over-apply regular plural patterns make common errors like 'childs' or 'mouses' — explicit instruction and practice prevents these mistakes.

Grade
3rd Grade
Ages
Ages 8-9
Subject
Grammar & Writing
Format
Printable PDF

Ratings & Reviews

3

Rachel H.

Homeschool parent · Verified download

Apr 2026

We've been waiting for this topic. Signed up just to get notified when it's ready.

Helpful · 6

Maria R.

Homeschool parent · Verified download

May 2026

Can't wait! This is exactly what we've been looking for. Please make it soon!

Helpful · 7

Tom B.

Learning Specialist · Verified download

May 2026

This will be a great addition. I already recommend ClassWeekly to all the families I work with.

Helpful · 10

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