Oh good it's not just our school! We don't actually have a class. Music 2 didn't get timetabled so we arrange it with our frees and the teacher's frees. But we haven't scheduled actual extension classes.
The whole two souls that are doing 3U at our school, yay, we do compo elective so, all she does is every 2 months goes 'how are you going?' and we show what we have or have not achieved in the last 2 months. Very mmm... She leaves a lot for us to organise, I mean, it's not as if there could actually be a lot achieved in a regular structured class, especially with composition and performance, because it's really just up to us who are doing them to do the work/research/practice etc, all they can really do is guide us and give comments/criticisms etc.
But mmm... do ext classes exist?