New York State Learning Standards and Core Curriculum
NY.5L. 5th Grade Language Standards
Conventions of Standard English
5L2. Demonstrate command of the conventions of Standard English capitalization, punctuation, and spelling when writing. Core Punctuation and Spelling Skills for Grades 3→5:
5L2.9. Use conventional spelling for high-frequency and other studied words, and to add suffixes to base words (e.g., sitting, smiled, cries, happiness).