I never fell asleep in school but idk why when I was in training whenever we had lessons i always worried about falling asleep and most of the time I would at the least be drifting n almost falling asleep. It's all the physical work then the late nights and early mornings and those classrooms were really comfortable especially the seats in the lecture rooms. We were told if we feel like we're going to fall asleep to stand up and go to the side or if you were caught sleeping it was push ups