The authors review theory and research relating to fluency instruction and development. They surveyed the range of definitions for fluency, primary features of fluent reading, and studies that have attempted to improve the fluency of struggling readers. They found that (a) fluency instruction is generally effective, although it is unclear whether this is because of specific instructional features or because it involves children in reading increased amounts of text; (b) assisted approaches seem to be more effective than unassisted approaches; (c) repetitive approaches do not seem to hold a clear advantage over nonrepetitive approaches; and (d) effective fluency instruction moves beyond automatic word recognition to include rhythm and expression, or what linguists refer to as the prosodic features of language. The process of becoming literate can be conceptualized as a series of qualitatively different stages through which learners progress as they become increasingly proficient with print (Chall, 1996b; Harris & Sipay, 1990). One of the primary advances in this process involves the shift from dealing with words on a word-byword basis to a rapid, accurate, and expressive rendering of text. In other words, learners develop such familiarity with print that they achieve fluency in their reading. Fluent reading may underlie or assist in effective engagement with text (LaBerge & Samuels, 1974). The purpose of this article is a review of the literature examining how children move toward fluent reading. It will incorporate both theoretical discussions and practical studies relating to fluency research. Specifically, to accomplish this purpose, we have reviewed the theoretical accounts of reading that include an important role for fluency in the reading process and studies that have attempted to facilitate its development.