thousand boxes of files describing wrongdoers at Hogwarts and their punishments. Harry was supposed to order them in alphabetical order, and rewrite the cards whose words were hard to see or otherwise damaged. The Weasley twins Fred and George had a whole drawer of these cards. For even more serious offences, students may be suspended or even expelled from Hogwarts. Harry and Ron are threatened with expulsion after crashing Ron's car into the Whomping Willow at the start of their second year, and Harry is expelled before the start of his fifth year (although the sentence is quickly changed to a disciplinary hearing) after he is detected using magic in the presence of Muggles, a serious offence among the wizarding community. Dumbledore argued in Harry's defence, stating that it was done in self-defence, and that the Ministry has no authority to expel students – such powers are invested in the Headmaster and the Board of Governors. Snape has attempted to have Harry expelled, and he attempted to have Harry's father, James Potter, expelled when they were at Hogwarts together. The only student known to have been expelled is Hagrid, for the murder of Myrtle with an acromantula believed to be the Monster of Slytherin and for opening the Chamber of Secrets – crimes for which Tom Riddle had framed him. Professors seem to be able to punish students with relative impunity and can hand out detention, even for unsatisfactory grades. Enforcement of rules outside of class mainly falls to the caretaker, with the assistance of the prefects. A student's Head of House usually has the final say in disciplinary matters. However, during Umbridge's tenure at Hogwarts, she quickly obtains the power to have the final say in disciplinary actions, due to an Educational Decree (one of many) passed by Minister for Magic Cornelius Fudge. In the summer before their fifth year, two fifth year students from each House are picked to be prefects, which grants them privileges and responsibilities and disciplinary responsibilities. The leaders of the student body, the Head Boy and Head Girl, are drawn from the seventh year students. Prefects have the authority to give detentions for infractions. Castle and grounds J. K. Rowling says she visualises Hogwarts, in its entirety, to be: A huge, rambling, quite scary-looking castle, with a jumble of towers and battlements. Like the Weasleys' house, it isn't a building that Muggles could build,