This edition of "NAEPFacts" highlights findings from the first attempt by the National Assessment of Educational Progress (NAEP) to measure elementary students' oral reading on a large scale. This article presents data on 1,136 fourth graders' oral fluency and its relationship to 3 other aspects of reading ability: comprehension, accuracy, and rate. Results presented in the article indicate that 55% of fourth graders read at the higher fluency ratings of levels 3 and 4; and 13% met the criteria for the highest rating in their oral reading. The more fluent fourth-grade readers tended to read with greater understanding, accuracy and rate. Contains five references. (RS)