In 1994, the Omaha Public Schools began implementation of the EXCELS process, an accreditation model focused on student achievement and participation in school and learning. This cycle was completed in 2000. The 2000-2001 school year was the planning year for the next cycle, which was identified as EXCELS PLUS. This model, outlined by the North Central Association, is used as a basis for the State of Nebraska accreditation of schools. This cycle was completed in 2005. The EXCELS PLUS Model was reviewed and improved for 2005-2010. District-wide schools use the EXCELS PLUS 2005 –2010 model for school improvement planning.