Appraisal-related training is also offered through school leader and supervisory officer associations as well as through web casts. Northern Ireland in the United Kingdom requires External Advisers to apply for annual reaccreditation to ensure they are informed about potential changes to the Performance Review and Staff Development Scheme and that they have the knowledge and competencies to provide helpful advice to governor reviewers. As very limited research, however, indicates, policy making in some contexts lacks attention towards the development of appraisal-related knowledge and competencies among evaluators and school leaders.