Khan Academy
Khan Academy: Irregular Plural Nouns Review
Learn the plurals of some everyday irregular nouns!
Khan Academy
Khan Academy: Irregular Plural Nouns: Mutant Plurals
Some nouns become plural by changing their vowels instead of adding an -s.
Khan Academy
Khan Academy: Irregular Plural Nouns: En Plurals
A few nouns become plural by adding -en at the end.
Other
K12 Reader: Reading Instruction Rsources: Irregular Plural Nouns
Designed for second and third graders, this resource from K!2 Reader includes the definition of "irregular plural nouns," examples of irregular plural nouns, and a instructional activity.