My Lycée (yes, I went to a Lycée, unlike you philistines) didn't have an official motto.
The unofficial one was "Work hard, don't ask questions, and shut the fUck-up!"
I went to the French Lycée in london, and it was quite a fUcked-up place. We were allowed to smoke cigarettes *in* the playground, because smoking outside the school would "give a bad image of French people to the English". Latin was compuslory (for one year, at least), and anyone who failed a year was sacked from the school, since bad students lowered the Baccalaureat results, and would therefore mean a drop in the league tables. They were really strict and disciplinarian.
Once, while queuing in the canteen, I started chatting to this class of 9-10 year old kids queuing behind me. I told them about the game "Simon says", and they got all excited. So while we were bored queuing, I shouted "Simon says: Sit down!" and some 25 kids instantly sat down. The queue supervisor (yeah, we had a few of those) went insane told them to get up again, so I said "Simon says: point your finger at the queue supervisor!", and 25 kids all pointed their finger at her. Then I said "Simon says: Sing the Marseillaise!!" and there you go, 25 little kids sitting down, pointing their finger at the queue supervisor, screaming the Marseillaise to this poor queue supervisor. It was so much fun...
And then, I got expelled from the school for 3 days.
Just for that.