CCSS.ELA-Literacy.L.2.1b
The Standard
Form and use frequently occurring irregular plural nouns (e.g., feet, children, teeth, mice, fish).
Common Core State Standards for English Language Arts
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students learn that some nouns do not become plural by adding s or es. They select and use forms such as teeth, mice, and children.
What Mastery Looks Like
- Students choose the correct plural without relying only on s or es. They use irregular forms correctly in complete spoken and written sentences.
Common Misconceptions
- Students may add s to every noun and write forms like tooths, childs, or mouses. They may also change nouns that stay the same, writing fishes when fish is expected.
How to Assess It
- Exit ticket: Complete “One goose, two ___,” then write a sentence using the plural form of child.
Lesson moves
Ways to Teach It
Give pairs singular and plural noun cards to match, then have students sort them into regular and irregular groups.
Ask, “What would be in a giant’s backpack?” and have students write three sentences using irregular plural nouns.
Play plural noun bingo by calling singular nouns while students cover the matching plural forms on their boards.
Use a shoe-store size chart, then write two sentences comparing one child’s foot with two children’s feet.
Free download
Printable L.2.1b Worksheet

A ready-to-print activity worksheet aligned to CCSS.ELA-Literacy.L.2.1b, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
Download the worksheetLearning progression
Where This Standard Sits
Before This Standard
If students are struggling here, check these first.
What This Unlocks
Mastery here sets students up for these next.
Keep exploring
Related Standards
Turn this exact standard into a lesson
Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.