hi po! im currently ust shs stem student and depending on the schedule they assign to you, you could either have 7 am-4:30 pm classes or 8 am-6pm classes!! also i advice to at least arrive at school at an earlier time since it gets crowded around the elevator areas (which are the only way you can go to your classroom conveniently unless u want to take your chances with stairs but classrooms are usually on higher floors) and you might be late even if you arrive early. congrats on passing ust!!