Haha yeah, my locker was literally my lifesaver last year, I don't think you should leave it with teachers though!
Yeah, the first few months, depending on your timetable, shouldn't be too bad with a shoulder bag, but you'll know when you need to expand it. Also if you're getting a backpack, get a reasonably sized ons rather than those Nike just do it bags.
Girls are definitely more lucky with this issue because they can actually fit their folders in their bags, whereas my bag looked obese
What I meant is she should be glad she's not in Wales