This document provides information about prefixes and how they are used to create new words. It discusses common prefixes like "un-", "re-", and "a-" and how they change the meaning of words. For example, "un-" prefixes make words mean the opposite. It also explains Latin and Greek prefixes like "auto-", meaning self, and "bi-", meaning two. Activities are suggested for students to practice identifying prefixes and creating new words by combining prefixes with word roots. The purpose is to help students understand how prefixes affect word meanings and support spelling.