A few districts have cracked down on where the test answer sheets are stored once they are completed by students. Others are requiring answer sheets be turned in to a state collection warehouse immediately rather than being kept on campus for several days.
The June audit showed that someone changed answers on fifth-grade math tests last year after students had turned their answers in to teachers. Two DeKalb County school administrators were charged criminally after the audit, and about a dozen educators lost their teaching licenses in Georgia as a result.

http://accesswdun.com/article/2009/12/225721