L.2.1
Demonstrate command of the conventions of standard English grammar and usage when writing or speaking.
L.2.1.b
Form and use frequently occurring irregular plural nouns (e.g., feet, children, teeth, mice, fish).
L.3.1.b
Form and use regular and irregular plural nouns.
L.3.3
Use knowledge of language and its conventions when writing, speaking, reading, or listening.