Hogwarts song, each student in turn is seated upon the stool in front of the rest of the student body. The Hat is placed on the student's head, whereupon it examines his or her mind and assigns them to one of the four Houses based on abilities, personality, and preferences. After the Sorting Ceremony, the students and teachers enjoy a feast, prepared by the Hogwarts house-elves. If Dumbledore is feeling cheerful, he will lead the students in singing the school song. Hogwarts is divided into four houses, each bearing the last name of its founder: Godric Gryffindor, Salazar Slytherin, Rowena Ravenclaw
Hogwarts tend to "move around", and so do the stairs in the grand staircase. Witches and wizards cannot Apparate or Disapparate in Hogwarts grounds, except when the Headmaster lifts the enchantment, whether only in certain areas or for the entire campus, so as to make the school less vulnerable when it serves the headmaster to allow Apparition. Electricity and electronic devices are not found at Hogwarts. In "Harry Potter and the Goblet of Fire", Hermione indicates that due to the high levels of magic, "substitutes for magic (that) Muggles use" such as computers, radar and electricity "go haywire" around Hogwarts. Radios