The majority of teaching posts at second level are filled on a permanent whole-time basis. Vacancies in schools arising from career breaks, approved leave of absence or secondments and concessionary posts, which are allocated in excess of a school's normal quota of posts, may only be filled in a temporary or part-time capacity. In addition, in order to ensure that schools have the flexibility to meet the curricular needs of their students, particularly in minority subject areas, it is necessary for them to appoint temporary or part-time teachers. The number of temporary whole-time posts is approximately 1,600.
Under the terms of the eligible part-time teacher scheme, EPTs who are fully qualified and have given satisfactory service are re-employed on a contract basis from year to year where the same teaching hours are required. Most teachers who are initially employed as EPTs subsequently apply for and are appointed to permanent teaching posts in their subject area. They are entitled to incremental and pension credit for their qualified EPT service, together with recognition of this service for promotion purposes.