A 2026 study covering 67 school districts in 38 U.S. states found no association between assessment frequency and students’ proficiency or growth in English or mathematics. The median number of state- and district-mandated assessments before high school was 57, with some students taking as many as 88. These findings challenge the assumption that administering more tests necessarily supports stronger learning outcomes.
Standardized testing became more influential under No Child Left Behind, which expanded state testing and linked results to school performance. Between 2001 and 2007, many districts increased weekly instructional time for English and mathematics, with average increases of 47% and 37%, respectively. Meanwhile, 44% of districts reduced time for other subjects or activities, including the arts. Although the Every Student Succeeds Act replaced the earlier law in 2015 and sought to diminish testing’s classroom role, public schools must still assess reading and mathematics annually in grades three through eight and at least once in high school. Scores can affect school ratings and trigger state monitoring or takeovers of struggling districts.
The demands extend beyond administering exams. In a 2016 survey, 62% of public school teachers considered the time devoted to state-test preparation excessive; teachers reported an average of 14 preparation days in a 180-day school year. Research has also identified dissatisfaction with standardized testing as a significant factor in teachers’ decisions to leave the profession. Separately, 2026 research linked concerns about test-related employment consequences with lower job satisfaction.
