Telling the difference between a common noun and a proper noun is very simple once you know what you're looking for. Proper nouns are words that name a specific person, place, thing or idea. They are always capitalized so the reader can tell them apart from common nouns. Common nouns do not name any specific person, place, thing or idea. They are not capitalized unless they are at the beginning
. of a sentence or part of a title. For some lesson plans for common and proper nouns, visit this web link: http://www.lovetolearnplace.com/Grammar/commonnouns.html .