There may be times when you need to leave class early. You should stay for up to half of the class of professor. Because out of the classroom from the beginning. May interfere with other students and professors interference. But if you really want to get out ahead of time. You should sit out the door so fast.
There will be times that you need to leave the classroom early. You should live for half of the class teacher. Because out of the classroom from the beginning. May interfere with other students and disturb the teacher. You should sit with the door to get out quickly.