This file contains letter size posters of rules for changing singular nouns to plural nouns. There are 7 rules included: adding s, adding es, changing y to i, adding s to words ending in y, changing f to v, irregulars, and words that stay the same. There is also a post with a definition of singular nouns. The last page is an assessment page where students change singular nouns to their plural form. There are 11 total pages including a cover page. Prints in PDF format.