After a six-month long investigation, the Yonkers inspector general found state achievement exam answers were altered in 11 classrooms at four Yonkers public schools.

In May, Superintendent Bernard Pierorazio informed the district that scores from some classes at School 29 and Casimir Pulaski School were being invalidated. Pierorazio then launched an investigation that later included reviewing more than 4,500 tests and report cards. After the probe by the inspector general, two more schools, the Cedar Place School and School 21, were also found to have answers tampered with on English Language Arts tests.

As a result of the investigation, principals from Casimir Pulaski School and School 21 have retired and Marilyn Walder from School 29 is working in the Central District office. School officials say they are happy the probe is over and the tampering was not a system-wide problem. Pierorazio says further disciplinary action may come and the cases will be referred to the Westchester District Attorney's Public Integrity Bureau.

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