It is defined as activities that develop an individual’s skills, knowledge, expertise and other characteristics as a teacher. Professional development is generally defined locally in the teacher questionnaire. How it is described varies by questionnaire and includes workshops, seminars, formal qualification programmes, observation visits, reading professional literature, among others.
UNESCO Institute for Statistics http://tcg.uis.unesco.org/wp-content/uploads/sites/4/2021/02/Metadata-4....