He looks vaguely thoughtful. "As far as I've ever heard, clothes are fine. Random unenchanted knives are safe, too, as far as I know. I don't know why clothes are fine and scissors learn to hate us. A lot seems to respond to our collective expectations... that's true outside, too."
"Neither school supplies nor homework will arrive in your room - that's pretty much just books, specifically spellbooks. There are supply closets - the one for paper and ink and such is smaller and usually safer than the artificing and alchemy supply rooms, but you do need to go fetch it, which you should do in a group, while armed. Homework will show up at your desk or lab bench or whatever. The void in our rooms does spellbooks, which are, unlike homework, mostly not mandatory."