At my school, I'm not really sure how we're doing it, but I think people are just going indivudally whenever they want. Like you can just choose a class you hate and go to the computing staff room and say you want to do it then.
At least I think that's what's happening. Noone has told me anythign about it, but I know some people who have done it, and a few were doing it during English the other day.
Computing is a crock of shit anyway - it's all common sense.