tests at his daughter's school last year. but you have concerns. >> of course, i have concerns like other parents, i have concerns. i hope that there's no cheating -- and if it is cheating, there need to be a punishment for it. >> and he's not alone. the state of georgia is investigating 10% of its elementary and middle schools, 191 of them. because of moderate to severe concern over test results in 2009. when the answer sheets like these were scored, the computer scanners could tell when the bubbles were erased and the answers changed. kathleen mathers heads the state audit. >> it's not just that someone had changed a bunch of answers, it was that when they changed answers they got the answer right as a result of that change. >> classes with an unusually high number of these changes were flagged. >> it's sort of like having a blizzard in ft. lauderdale in the middle of july. you know, in theory it could happen, it's just so incredibly unlikely you that really need a substantial explanation.