PENGARUH SUPERVISI, LINGKUNGAN KERJA, PELATIHAN DAN ORGANISASI PEMBELAJAR TERHADAP EFEKTIVITAS MANAJERIAL KEPALA SEKOLAH MENENGAH ATAS SWASTA DI JAKARTA TIMUR THE EFFECT OF SUPERVISION, WORK ENVIRONMENT, TRAINING, AND LEARNING ORGANIZATION TO THE MANAGERIAL EFFECTIVENESS HIGH SCHOOL PRINCIPAL PRIVATE IN THE EAST JAKARTA Nani Kurniasih 7617120737 kurnianani@ymail.com ABSTRACT The purpo…