The NCATE accreditation system is a voluntary peer review process that involves a comprehensive evaluation of the professional education unit (the school, college, department, or other administrative body that is primarily responsible for the preparation of teachers and other professional school personnel). The review is based on the NCATE Unit Standards, a set of research-based national standards developed by all sectors of the teaching profession. Accreditation requires an on-site review of the unit and a review of the individual programs within the unit. Using NCATE unit standards, a group of examiners, known as the Board of Examiners (BOE), conducts an on-site visit and evaluates the unit's capacity to effectively deliver its programs. The review of individual programs is a review conducted by the state or electronically through NCATE and the specialized professional organizations, depending on the type of partnership NCATE has developed with the unit's state.