2000 Washington - 204,000 writing WASL exams rescored
2002 Florida -- dozens of school districts received no state grades for their 2002 scores because of a "programming error" at the DOE. One Montessori school never received scores because NCS Pearson claimed not to have received the tests.
2005 Michigan -- scores delayed and fines levied per contract
2005-2006 SAT college admissions test - 4400 tests wrongly scored; $3 million settlement after lawsuit (note FairTest was an expert witness for plaintiffs)
2007-2011 Mississippi - subcontractor programs correct answer as incorrect resulting in erroneous results for almost four years during which time 126 students flunked the exam due to that wrongly scored item. Auditors criticized Pearson's quality control checks, and the firm offered $600,000 in scholarships as compensation
2008 South Carolina --"Scoring Error Delays School Report Cards" The State, November 14, 2008
2008-2009 Arkansas -- first graders forced to retake exam because real test used for practice