She wore that same skirt she always wore when they had a test. Tim thought it was quite flattering, falling to just above her creamy knees. He had come to class early to get a seat next to her; she always sat in the same seat in the back corner.
As the test went on, he glanced over at her a few times. About half way through, he noticed her skirt creeping up her thigh. At first he was excited, maybe she liked him back. His hopes were instantly deflated when he saw the math formulas written on her leg.