She's in luck

Anna peeks around the corner, revealing a very empty yard, grinning to herself she runs nearly full sprint to the school building, quickly finding a door, slipping inside and closing it behind herself, looking around she found herself in an empty hallway, had her feet been bare she'd have felt the full brunt of the freezing cold floor, though her warmth was the least of her concerns, every moment she spent here increased the risk of being caught, but she had a mission...and she was most certainly not going to chicken out now.

Pushing herself, she took one step...then one more...then another, before stopping and listening, thinking that she'd heard something...after a minute or two of silence she started again "Where to go..." she mumbled to herself, thinking of where she could find a spare...or even a discarded uniform "...changing room, why didn't I think of that?" she says out loud, before remembering her situation, cursing to herself internally she made her way through the empty corridors, moving quickly past doors, just in case she gets spotted through the glass.

Soon she was outside the girls changing rooms, the door was closed and she couldn't hear anything behind them...that could mean the room isn't in use...or it's locked...or there might even be a really quiet class in there...Anna **** herself to stop imagining scenarios and moved to test the door handle...