Hermione was noted for being extremely intelligent and hard-working, coming out on top in most of her classes and continuously aiding Harry and Ron in their adventures. She was so studious that the school gave her a Time-Turner in her third year, a device that rewinds time so that she could take extra courses.[8] Because of her efficiency, she often had time to do hobby work on the side, such as preparing a defence for Buckbeak to save him from execution, and creating S.P.E.W., an organisation promoting the freedom of house-elves.[9] Such acts demonstrate Hermione's social conscience, tenacity, and compassion.