This video provides a comprehensive lesson on plural nouns. It explains the different types of regular plural nouns and how to form them by adding -s, -es, or -ies to the end of the singular noun. It also covers irregular plural nouns and the various ways they are formed. The video emphasizes the importance of subject-verb agreement and how other words in the sentence may need to change when using plural nouns. This video meets Common Core third grade language standards.