The Ohio Department of Education and Workforce on September 4 announced that a comprehensive review by its statewide testing vendor identified 52 additional school buildings with significant testing anomalies that may warrant further investigation. The expansion brings the total number of flagged sites to 54, including the two Columbus high schools that triggered the probe in July.
Of the 52 buildings, 37 are public community (charter) schools and 15 are traditional public schools. They span at least 16 counties. The state testing vendor applied a statistical screening: tests were flagged if students showed abnormally fast or slow response times, changed answers from wrong to right at rates significantly above average, had score gains far exceeding the prior year, or if a student with a history of poor performance answered hard questions correctly while missing easy ones. A building was flagged when the percentage of such assessments exceeded the state average and fell above or below standard deviation thresholds.
Origins and scope
The investigation began July 2, when the Ohio Department of Education and Workforce announced a probe into Columbus City Schools after the district self-reported testing anomalies at Independence High School and Walnut Ridge High School. Columbus City Schools invalidated all spring 2026 test scores in all subjects at both schools and offered retakes. In letters to families, the district stated that staff members reported students using cell phones and other smart technology during testing, and that questions were raised about the preparation of adult proctors. The district said it was not accusing individual students of cheating but that phone use required score invalidation.
Information about the Columbus anomalies was forwarded to the State Board of Education's Office of Professional Conduct. The department has stated that because the review is just underway, potential implications are unknown.
Flagged buildings and clusters
The 15 traditional public school buildings on the expanded list include six buildings in Steubenville City Schools, three in Cleveland Metropolitan School District, and one each in Bellaire Local, Cincinnati Public, Dawson-Bryant Local, Indian Creek Local, Newark City, and Newton Falls Exempted Village school districts.
Among the charter schools, six of the eight Franklin County schools on the list are under the corporate umbrella of Performance Academies. An Ohio Department of Education and Workforce spokesperson said the department will determine next steps for those schools after they respond to a request for more information. Schools have been required to submit their responses by September 18.
Newark City Schools independently noticed anomalies at Hillview Elementary in spring 2026, began an internal investigation, and hired a third-party investigator whose findings were shared with the state this summer. The district said it will cooperate fully.
A spokesperson for Ohio Gov. Mike DeWine said the governor's office takes the integrity of standardized testing seriously, that the department's proactive step shows oversight is working, and that the office will work with the state legislature if further guardrails are needed.
Comparative precedent: statistical flagging in Georgia and Washington, D.C.
The statistical methodology Ohio's vendor is using mirrors approaches that uncovered major cheating scandals elsewhere. From 2009 to 2011, Georgia's Governor's Office of Student Achievement commissioned CTB/McGraw-Hill to conduct a statewide erasure analysis of the Criterion-Referenced Competency Tests. The vendor flagged classes with wrong-to-right erasure rates more than three standard deviations above the state average. That led to a special investigation of Atlanta Public Schools that found cheating at 44 of 56 schools examined, or 78.6 percent, and identified 178 educators involved. The scandal cost Georgia taxpayers at least $6 million.
In 2011, Washington, D.C.'s Office of the State Superintendent of Education used the firm Alvarez & Marsal to investigate D.C. CAS tests across 262 schools. Of 5,089 tested classrooms, 70 in 38 schools were flagged using criteria that included wrong-to-right erasure ratios more than two standard deviations from average, unusual test-score gains, and non-bell-curve score distributions. Subsequent findings showed 23 schools had some degree of test violations; 3 received critical designations and had results invalidated.
A 2012 analysis by the Atlanta Journal-Constitution of 1.6 million test-score records across 69,000 schools nationwide found hundreds of districts with test-score patterns resembling those in the Atlanta scandal. The newspaper noted the analysis does not prove cheating in any district but suggests the testing gains were unlikely to happen by chance. Testing expert Greg Cizek of the University of North Carolina told NBC News that similar patterns are probably widespread, and that schools or districts not finding them may simply not be examining their data closely enough.
What the research says about anomaly detection
Wrong-to-right erasure analysis, the statistical method central to the Georgia investigation, is considered reliable for flagging anomalous patterns. CTB/McGraw-Hill determined that classes with wrong-to-right erasures more than three standard deviations above the state average had a 1-in-370 chance of occurring by coincidence. At seven standard deviations, the probability was 1 in 390 billion. However, the Georgia investigative report noted that erasure analysis does not indicate that the external force was cheating; it only suggests something other than normal student erasing occurred. That limitation applies to Ohio's current approach, which uses standard-deviation thresholds across multiple metrics.
Experts have emphasized that statistical anomaly detection is necessary but not sufficient. Aaron Pallas, a professor at Columbia Teachers College, told NBC News that anomalous testing results warrant investigation but should not by themselves be taken as proof of widespread cheating. Brian Jacob, director of the Center on Local, State, and Urban Policy at the University of Michigan, told NBC News that many school districts and states conduct high-stakes testing without adequate auditing or security procedures. He also noted that practices such as teaching to the test, while more difficult to detect, may negatively affect the educational process.