This tests special plural words. 'Men' is the special plural of 'man'. The word changes completely for more than one.

This tests special plural words. Mouse changes to mice when there's more than one. Some words change their whole middle part!

This tests special plural words. 'Teeth' is the special plural for 'tooth'. The word changes completely when we mean more than one.

This tests special plural words. 'Teeth' is the special plural of 'tooth'. The middle part changes from 'oo' to 'ee'.

This tests special plural words. 'Mice' is the special plural of 'mouse'. We don't add 's' to make 'mouses'.

This tests special plural words. Child changes to children for more than one. It's a special word that doesn't just add -s.

This tests special plural words. Goose changes to geese for more than one. The middle sound changes from 'oo' to 'ee'.

This tests special plural words. Man changes to men when there's more than one. The 'a' changes to 'e' in the middle.

This tests CCSS.L.2.1.b (forming and using frequently occurring irregular plural nouns like feet, children, teeth, mice, fish). Most plural nouns are formed by adding -s (cats, dogs) or -es (boxes, dishes), but irregular plurals don't follow this rule. Common irregular plurals 2nd graders should know: foot→feet (change vowel), tooth→teeth (change vowel), child→children (add -ren), mouse→mice (change vowel), man→men and woman→women (change vowel), fish→fish and sheep→sheep and deer→deer (no change), goose→geese (change vowel), leaf→leaves, knife→knives, shelf→shelves, and wolf→wolves (change -f to -ves). Students must memorize these because they don't follow the regular pattern. Choice B is correct because "men" is the proper plural form of "man." This is a frequently occurring irregular plural that follows the vowel change pattern. Choice A shows adding -s incorrectly. Second graders often try to add -s to all plurals even irregular ones, use singular form as plural, mix up vowel changes, forget to change -f to -v. To help students: Create irregular plural chart organized by pattern: Vowel Change (foot-feet, tooth-teeth, man-men, woman-women, goose-geese, mouse-mice), Add -ren (child-children, ox-oxen), No Change (fish-fish, sheep-sheep, deer-deer), F→V (leaf-leaves, knife-knives, wolf-wolves, shelf-shelves, loaf-loaves). Practice with flashcards: singular on one side, plural on other. Use memorable sentences: "One tooth, two teeth, all my teeth!" "One child, two children, many children." Read aloud books that use irregular plurals naturally, point them out. Make it physical: Have students show one foot, then both feet. Count teeth in mirror. Sorting activity: regular plural cards vs irregular plural cards. Common error correction: When student says "foots" or "childs," gently correct "Remember, it's feet, not foots. Foot-feet is an irregular plural." Watch for: students adding -s to irregular nouns (foots, childs, mouses, sheeps), students using singular as plural ("two tooth"), students confused by no-change plurals (fish-fish, sheep-sheep, deer-deer).

This tests CCSS.L.2.1.b (forming and using frequently occurring irregular plural nouns like feet, children, teeth, mice, fish). Most plural nouns are formed by adding -s (cats, dogs) or -es (boxes, dishes), but irregular plurals don't follow this rule. Common irregular plurals 2nd graders should know: foot→feet (change vowel), tooth→teeth (change vowel), child→children (add -ren), mouse→mice (change vowel), man→men and woman→women (change vowel), fish→fish and sheep→sheep and deer→deer (no change), goose→geese (change vowel), leaf→leaves, knife→knives, shelf→shelves, and wolf→wolves (change -f to -ves). Students must memorize these because they don't follow the regular pattern. Choice C is correct because "feet" is the proper plural form of "foot." This is a frequently occurring irregular plural that follows the vowel change pattern. Choice A shows adding -s incorrectly after vowel change. Second graders often try to add -s to all plurals even irregular ones, use singular form as plural, mix up vowel changes, forget to change -f to -v. To help students: Create irregular plural chart organized by pattern: Vowel Change (foot-feet, tooth-teeth, man-men, woman-women, goose-geese, mouse-mice), Add -ren (child-children, ox-oxen), No Change (fish-fish, sheep-sheep, deer-deer), F→V (leaf-leaves, knife-knives, wolf-wolves, shelf-shelves, loaf-loaves). Practice with flashcards: singular on one side, plural on other. Use memorable sentences: "One tooth, two teeth, all my teeth!" "One child, two children, many children." Read aloud books that use irregular plurals naturally, point them out. Make it physical: Have students show one foot, then both feet. Count teeth in mirror. Sorting activity: regular plural cards vs irregular plural cards. Common error correction: When student says "foots" or "childs," gently correct "Remember, it's feet, not foots. Foot-feet is an irregular plural." Watch for: students adding -s to irregular nouns (foots, childs, mouses, sheeps), students using singular as plural ("two tooth"), students confused by no-change plurals (fish-fish, sheep-sheep, deer-deer).