This document discusses the difference between common and proper nouns. It provides examples of each type of noun and explains that common nouns name general items while proper nouns name specific people, places or things. Common nouns are not capitalized unless they begin a sentence, while proper nouns are always capitalized. The document includes charts listing common and proper nouns and sample sentences using both types of nouns to demonstrate the difference. It then provides exercises for the reader to identify nouns as either common or proper in additional examples.