This demonstration booklet illustrates the kind of exercises, test questions, and tasks used in the 2003 assessment of student achievement in reading and mathematics by the National Assessment of Educational Progress (NAEP). Each student will be asked to complete the background section and the cognitive sections for one subject, and the assessment will require 90 minutes of a student's time. The booklet for Grade 12 is divided into four sections: Part One contains the descriptions of each assessment, followed by the booklet directions and subject-specific samples of reading and mathematics questions; Part Two contains the general background questionnaire that students will be asked to answer; Part Three contains the background questionnaires that accompany each subject; and Part Four (located on the back cover) presents general information about the NAEP program. (PM)