Meridian Public Charter School has begun an internal investigation into cheating on standardized tests after a District investigation found “strong circumstantial evidence” that cheating efforts were orchestrated throughout the school, officials announced Monday.

Standardized tests across the school had 1,804 wrong answers erased and changed to right answers last year, one of the highest levels of changed answers in a single public school in the District, according to the investigation by the Office of the State Superintendent of Education.