THE INFLUENCE OF MOTIVATION, PRINCIPAL LEADERSHIP AND JOB SATISFACTION ON THE PERFORMANCE OF TEACHING STAFF WITH THE WORK ENVIRONMENT AS AN INTERVENING VARIABLE IN PUBLIC HIGH SCHOOLS IN KARO DISTRICT - Perangin-angin, Imanta; Syaifuddin; Faris, Salman; Ananda, Fajar Rezeki (International Journal of Advance Research and Innovative Ideas In Education, 2023)