I used to do that a lot. Specially whenever I had a flu or something like that...... usually I'd sleep at spanish class, (but that spanish class was like english is for most of you), I'd never sleep at english class since I liked it and the teacher was quite
(although sometiems I would make an exception and sleep there as well)
There was also a boring theorical computer's class (in which we would see stuff like "what's the internet?" -_-) so I would just catch up some of my sleep like lil Mena does. Because I always slept for short at night.