NAEP 2004 trends in academic progress

"This report presents the results of NAEP long-term trend assessments in reading and mathematics, which were most recently administered in 2004 to students ages 9, 13, and 17. Because the assessments have been administered at different times in the 35-year history of NAEP, they make it possible to chart educational progress since 1971 in reading and 1973 in mathematics"--P. iii.