a bit of marking and Yes, you may have to plan some lessons.
Really not "a bit" and "some", it's a rediculous amount as class sizes are far larger than they should be. If you say that then you clearly don't know any teachers, I know a fair amount and many of them rarely get to come out to play.
As a side note, I hope RTBiscuit uses better spelling, punctuation and grammar when teaching his class then he does on the forum.
He teaches tech and is dislexic... Not seeing how that is a fair comment.