Do state tests overstate student achievement gains compared with national assessments?
Core argument: A Center of Education Policy study reports median average annual gains in grade 4 math proficiency of 1.3% on state tests versus 0.5% on NAEP, and 1.8% versus 1% in grade 8 math.
A study by the Center of Education Policy highlights a significant discrepancy between state test results and NAEP [National Assessment of Educational Progress] outcomes, revealing that state tests often overstate educational gains. For instance, the median average annual gain in grade 4 math proficiency was 1.3% on state tests compared to 0.5% on NAEP, while for grade 8 math, the figures were 1.8% and 1%, respectively. This disparity may stem from state tests being more aligned with local standards, score inflation due to targeted test preparation, and the lower stakes of NAEP for students and teachers. Despite these differences, both assessments generally show positive trends, with state tests indicating larger gains. However, in some cases, NAEP gains surpassed those of state tests, particularly in grade 4 reading. This suggests a need for careful interpretation of state test results when assessing educational progress.


