Irregular plural nouns worksheets
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Some nouns don't add -s for the plural. They change: one mouse, two mice; one foot, two feet.
Three grades, each its own sheet. Print one here, or open a grade for examples and teaching notes.
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2nd grade
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.
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3rd grade Core grade
Each print is a different sheet with its own answer key. You don't need to sign up.
Irregular plurals change form (mice, feet, children) or refuse to change at all (sheep, deer, fish). Third graders solidify the core set and write the correct form, steering past tempting inventions like childs, sheeps, and mices.
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4th grade
By 4th grade, the set widens to the odd corners: oxen, people, moose, and the f-to-ves crossovers like wolves and knives. Students also meet words where two forms exist, learning that "irregular" doesn't mean lawless.
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