Five different activities! These pages are easy to use and come with answer keys. Lesson reminders about how nouns can be irregular plurals and examples are included on each page. Three different styles of practice with irregular plurals - write the singular or plural form of the noun, tell if the noun is one (singular) or plural (more than one), and replace the incorrect plural noun then write the sentence correctly. The last two styles of practice are combined on two different pages, and separated into their own practice pages with the same questions if you want variety or to focus on the same type of question.