Inclusion criteria

Exclusion criteria

· Empirical studies within the field of educational leadership

· Peer-reviewed journals

· Articles published in English

· Articles published between 2016 and 2019

· Articles including primary and secondary school systems

· Articles showing a relationship between educational leadership and at least one of the following keywords: school improvement, staff development and leadership styles.

· Articles written in other languages

· Articles which were not specified as empirical studies

· Articles which were not peer-reviewed

· Articles that were published prior to 2016