1. A computer-implemented method for generating a search index that is searchable by a readability indication associated with entries in the search index, comprising the steps of: (a) identifying a document for addition to the search index; (b) analyzing a readability of the document that was identified to produce a readability indication for the document; and (c) generating a new entry in the search index for the identified document, wherein the new entry includes the readability indication, thereby enabling the document to be identified relative to the readability of the document during a search of the search index.