It was 4:23 PM of the last day before the mid-semester break, according to the old ticking clock that hung from the wall just above the chalkboard, and as expected the students were eager to leave the room even if there was actually still some class time left. Many students even had particular techniques to exert pressure on the teachers until they let them go. Most simply started packing their things, intentionally making noise so that the teacher knew they were…