Reminds of my washroom breaks in high school .... I'd go to the toilet, then spend 40 minutes of the 60 minute class playing cards in the cafeteria before heading back to class. I didn't have great teachers but it took about half a semester before I was asked not to do that any more because it made the teacher look bad. Probably because about four of us were all doing the same thing in class. The system was so bad that we all got passing grades any way in the end.