Prepositions are one of the eight major parts of speech. They are a fairly important part of speech, as they help to determine the relationship between all of the other words in a sentence. Prepositions are often referred to as relationship word or direction words, since they dictate how the nouns, pronouns and phrases relate to each other or together in a sentence. Without prepositions, it would be very difficult to communicate meaning. For example, a sentence that says, "the book is the table" has very little meaning; but, a sentence that says "the book is on the table" suddenly makes a lot more sense with the addition of the word "on." A great way to teach prepositions is with the use of games.