List of Articles مدیران متوسطه و راهنمایی Open Access Article Abstract Page Full-Text 1 - The Relationship between Self-efficacy and Effectiveness of Principals from the Perspective of Principals and Teachers of Secondary and High Schools (Case Study of Chamestan Region) Nowruz Naiji Fareba Jahanshahi , Reza Youawfi Saeedabadi Kambiz Espahbadi