The purpose of this report is to examine aspects of oral reading performance--accuracy, rate, and fluency--that cannot be observed from results of the main NAEP (National Assessment of Educational Progress) reading assessment. The results provided here are intended to inform educators and researchers about these three aspects of fourth-graders' oral reading performance and how they relate to their overall reading ability as measured by the 2002 reading assessment. This study focuses on one relevant, but sometimes overlooked, aspect of reading performance--oral reading ability. Oral reading performance, measured by the components of accuracy, rate, and fluency, constitutes a cluster of critical literacy proficiencies and functions as a significant indicator of overall reading ability. The report is divided into the following chapters: (1) Introduction; (2) Oral Reading Accuracy; (3) Oral Reading Rate; (4) Reading Fluency; and (5) Summary of Oral Reading Study Results. Appended are: (1) Overview of Procedures Used for the NAEP 2002 Oral Reading Study; (2) Oral Reading Passage and Questions to Prompt Students' Recall of the Passage; and (3) Standard Errors. (Contains 28 tables and 26 figures.) [Project Officer for this report was Arnold Goldstein.]