New York State Learning Standards and Core Curriculum
NY.1L. 1st Grade Language Standards
Conventions of Standard English
1L1. Demonstrate command of the conventions of Standard English grammar and usage when writing or speaking. Core Conventions Skills for Grades Prekindergarten→Grade 2:
1L1.3. Form regular plural nouns orally (e.g., dog, dogs; wish, wishes).
1L1.4. Form and use frequently occurring irregular plural nouns (e.g., feet, children, mice, fish).