This publication highlights the key concepts and findings of the 2018 National Assessment of Educational Progress (NAEP) Oral Reading Fluency (ORF) study. Oral reading fluency is defined as the ability to read text aloud with speed, accuracy, and proper expression. The NAEP ORF study was administered to a nationally representative sample of over 1,800 fourth-graders from 180 public schools. The students in the ORF study first completed the NAEP fourth-grade reading assessment. Then they moved on to the tasks that were administered for this study: reading out loud four short passages to assess oral reading fluency and two word lists to assess skills that provide the foundation for fluency. Both the NAEP reading tasks and the study tasks were administered to students on tablets, and students' responses were recorded on the tablets. [For the full report, see ED612204.]