I think so, you end up getting work to do at home. And then you have to memorize all the stuff you learnt.

[Try a billion times worse. It's bad enough you have to go in the first place, but then you're expected to remember what you've gone over?! Hah!]

An idol is someone that sings and dances around, it's their job. My world didn't have any but I've met some idols here.