In my youth I brought waffles, several thermo-cans of tea, as well as two lunchboxes of ryebread with pate and bread to every English, Maths, and Science, etc. lesson throughout my highachool career all the while it being punishable with a 1 hour detention to eat inside a classroom... all the while always sitting at front. It pays to clean up after oneself, being helpful to others, polite to the teacher, and quiet when working. There's a reason why only I was allowed to do such meanwhile all the 3000 other students weren't.