Standardized test scores for three D.C. Public Schools classrooms from 2010 have been tossed out after an investigation into cheating.
A USA Today report found that classrooms that showed significant improvement also showed a high rate of erasures from wrong to right answers.
Caveon LLC reviewed 10 schools identified as having possible testing concerns and found one confirmed case of impropriety and two possible irregularities, according to D.C. public schools.
The Office of the State Superintendent of Education sent a letter to acting Schools Chancellor Kaya Henderson Wednesday morning to let her know of its intention to invalidate the scores.
The three teachers were not allowed to administer the citywide exam in 2011, according to DCPS.