Last Minute Revision for Potions Class exam.

Miranda is one of those students who can never believe she is ready for her exams, despite being a naturally-talented magic user. The early hours are cold, and the candles offer little warmth, but her faery friend is always on hand to bring her new books. 

As the professor says, "cauldrons don't fill themselves, and the contents must be precise for the potions to work."