The Meridian Public School District says it has received an upgrade in accreditation status from advised to full accreditation.
MPSD said it was notified Thursday that "no current warning or deficiencies remained".
The district's level was lowered May 30, 2009, from accredited to advised due to testing irregularities, and was cited for test security violations during the April 2008 testing cycle of the Subject Area Testing Program (SATP).
The testing violations included a high school teacher copying a 2007 state English test and using it to prepare her students for the test administered in 2008.
The district says it has worked with the Mississippi Department of Education to improve test security policies and enforcement.
“In order to make data-driven instructional decisions based on state assessment data, it is important to maintain the integrity of state assessment data by maintaining protocols for test confidentiality,” said interim superintendent, Dr. Terry Larabee.