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.
(..) They're in her phone. - Just forget all that, please. - Excuse me. Hi. Forget it. - I need to find Friendship Island. - Look at this. years of piano lessons. Yeah. It looks pretty faded. You know what. Save Chopsticks and Heart and Soul, get rid of the rest. - Are you. (..)2015 Inside Out