The Principals' Circle of the Philippines The Principals’ Circle of the Philippines is an organization of principals and educational leaders dedicated to the attainmentof academic excellence through improvements in curriculum, classroom instruction, assessment, and faculty development. Principals' Institute Principals’ Institute is a unique program for educational leaders, dedicated to impoving the quality of education by honing educator’s skills in leadership and management, classroom intstruction and assessemnt. The 3rd phase of the program consists of cultural and educational trip at the California State University.