A classroom maybe?

Anna walked on, her footsteps echoing through the halls, internally she cursed her shoes, they'd give her away too easily...but they were among her last remaining clothes...

She groaned to herself and slipped them off, holding them in her hand and taking a step...only to almost slip over, her socks it seems weren't suited to the smooth wooden floors the school had all over.

Again she groaned, setting her shoes down and pulling her socks off, now completely naked and barefoot on the cold wooden floor, she balled up her socks and tossed them into her shoes, only to be startled by a door opening somewhere behind her. Reacting out of instinct she bolted, bare feet slapping on the wooden flooring as she ran around a corner, taking cover and listening. It seems that class was late leaving, they'd take too long to clear out...and her shoes, they might as well be lost now...

She poked her head out to see someone picking them up, returning to the classroom with them. Yes, definitely lost.