Teaching staff in total secondary. Public and private. Full and part-time. All programmes. Total is the total number of teachers in public and private secondary education institutions (ISCED 2 and 3). Teachers are persons employed full time or part time in an official capacity to guide and direct the learning experience of pupils and students, irrespective of their qualifications or the delivery mechanism, i.e. face-to-face and/or at a distance. This definition excludes educational personnel who have no active teaching duties (e.g. headmasters, headmistresses or principals who do not teach) and persons who work occasionally or in a voluntary capacity in educational institutions.