Her chemistry notebook

Unfortunately for Anna, since she arrived at school in such a rush, she was only able to grab her chemistry notebook. She even left her coursebook in the locker!

At first she placed the notebook at the top of her exposed thighs, only for her to realize that she needed the notebook to take down notes since the usage of the electromagnet is a relatively new topic, and with the exams fast approaching, she wouldn't want to miss a topic now!

Out of desperation she ripped out two pieces of paper from the middle of the book. One used to cover up her exposed thighs, and the other to be used to cover either another part of her leg that the first piece of paper couldn't cover, or to cover the backside of her panties, just in case she needed to stand up for whatever reason. Thankfully the things written on those two papers are nothing more than wrong, crossed out workings, but she wasn't able to rip the third piece of paper since it contained improtant theories and formulaes.

Anna's initial plan was to retrieve the skirt once everyone had gotten out after class, but that's if she could avoid humiliation during the class itself.