Our 2005 science scores, released by the National Assessment of Educational Progress (NAEP), were even more shocking.

NPR: Seeking Solutions for the Nation's Broken Schools

Results of the IEA international comparisons present a somewhat more optimistic picture than the National Assessment of Education Progress (NAEP) of the reading levels of U.S. students.

UNESCO: II Part Analytic Section

Public high school graduation rates peaked around 1970, and data show that reading scores on the National Assessment of Educational Progress (NAEP) fell slightly between 1992 and 2008.

FORBES: Schools Are Already Bloated, So Why Does Obama Want More Personnel?

To understand the results of this year's National Assessment of Educational Progress, or NAEP, you have to look at the bigger picture.

NPR: Mixed Report Card for U.S. Schools

Since then, however, substantial data have become available, most notably those of the federally sponsored National Assessment of Educational Progress, or NAEP.

UNESCO: II Part Analytic Section

In 1998, the percent of fourth-grade students in the highest-poverty public schools who met or exceeded the NAEP Basic level in reading was about half the national rate, and progress in reading overall is only back to 1998 and 1990 levels.

UNESCO: II Part Analytic Section

Mr. MONTY NEILL (Co-Director, National Center for Fair and Open Testing): While scores have tended to go up on NAEP at grade four--and in math they went up fairly solidly for a while--they've now leveled out.

NPR: Mixed Report Card for U.S. Schools