http://www.primaryresourcecentre.com/ourshop/prod_1564282-Singular-Plural -Display-Posters.html | Plurals, Singular and plural, English teaching materials
Plural Nouns Rules Posters by Laura Skakle | TPT
Plural Pack | Teacher's Take-Out
Der Plural Poster - Daydream Education
Teaching With Love and Laughter: Plural Posters and Word Family Books