OOC sense > IC sense in this specific instance.
It definitely would make more sense IC for them to be broken up by year, but with the exception of the HOLY BIG CLASS BATMAN first years, that simply was not about to happen :P
OWL level has three years of material to sift through. Think of it as sets of modules rather than a linear progression. All OWL charms students have to do A B C D E and F. If you don't do A and B in year 3, you'll do them in year 5 when it cycles back around to them!
It definitely would make more sense IC for them to be broken up by year, but with the exception of the HOLY BIG CLASS BATMAN first years, that simply was not about to happen :P
OWL level has three years of material to sift through. Think of it as sets of modules rather than a linear progression. All OWL charms students have to do A B C D E and F. If you don't do A and B in year 3, you'll do them in year 5 when it cycles back around to them!