Meridian Public Charter School officials have said that are continuing to examine allegations of test-tampering at the school and have not yet disciplined any staff members.

Meridian was among four charter schools that the Office of the State Superintendent flagged last month for cheating on 2012 standardized tests. Five classrooms — representing more than 40 percent of tested students -- were implicated.

Meridian’s students had an inexplicably high number of wrong-to-right erasures on answer sheets. Across the entire school, 1,084 answers were changed from wrong to right — one of the highest levels in the city.

The D.C. Public Charter School Board had asked the school to report on its response to the cheating allegations by Monday. Meridian officials said they need more time to do a thorough job and promised to reach conclusions and take action before the board’s next meeting in June.

If Meridian fails to persuade the board that it has responded appropriately, board members could vote to begin charter revocation procedures.

At each of the other three flagged charter schools, problems were isolated to one classroom. Representatives from those three schools told the charter board Monday that teachers and administrators who cheated are no longer employed.