Investigations of the perceptions of teachers in Science and Art Centers (SAC) to the leadership competencies of administrators' institutional effectiveness, institutional culture in terms of various variables

"School Administrators' Leadership Qualification Scale", "School Effectiveness Scale" and School Culture Scale were applied to 364 teachers in 72 SAC in Turkey in 2016. It has been found that the perceptions of the teachers', administrators regarding the subordinate dimensions of leadership competencies are "Very adequate". It was observed that teachers found their institutions effective at perceptions of teachers about sub-dimensions of institutional effectiveness; "many" levels in the safe and regular environment subdimension, open school mission and goals, high expectations, learning opportunities and development monitoring, and "very" level in school family relationships and instructional leadership subdimensions. The perceptions of teachers about the sub-dimensions of corporate culture were found to be at the level of "I fully agree". Although there were significant differences between the perceptions of the teachers' administrators' leadership competencies and institutional effectiveness the variables of the teachers' occupational seniority status, the way they were assigned to SAC, and the way administrators were assigned to SAC, there was no significant difference between the gender and educational status variables. There were no significant differences between gender status, vocational seniority status, and education status variables, although there were significant differences between the perceptions of teachers about institutional culture and the way in which teachers were assigned to SAC and administrators were assigned to SAC