The names for the themes and categories in this inventory have been created with ease of use in mind. Each citation has been placed into a variety of categories. Each theme is presented with a definition. The themes and their definitions reflect an attempt to be as inclusive as possible since this site is designed for a variety of educational needs. However, it is recognized that many of the themes used have different meanings for different people. Please consider them as starting points for thought and discussion.Full-text searches are also available on the main page of each of the five themes. For the convenience of users, it can search all of the categories listed under the theme by author, title, and/or subject.