I'm glad they got caught. That will 'teach them a lesson'! [=they will learn that they should not do that again]
We 'learned our lesson' the hard way. [=we learned from an unpleasant experience]
They studied the 'lessons' [='teachings'] of the great philosophers.
(..) Master, are you alright? So sorry. So sorry. Master, I can't breathe. So sorry, Master. Next, Master Kichijoji will give individual lessons. Master, choose anyone you like. Mitaka, you've been chosen. Don't worry. He understands. I said go easy, you fool. A little easy. (..)2007 Kantoku · Banzai!