Powers and rightsEdit
Professors have the power to award and dock points, give detention and write notes for certain areas and activities that are usually off limits, such as the Restricted Section in the Hogwarts Library or permission to practice on the Quidditch pitch.
It is presumed that wizards and witches do not need any form of specific education, other than having received their O.W.L.s and N.E.W.T.s, to gain the title of Professor and become a Hogwarts teacher, as people such as Dolores Umbridge were able to become teachers at Hogwarts. However, even someone who did not complete their O.W.L. examinations was able to become a Professor, as long as he or she had been chosen by the Headmaster/Headmistress of the school in question, or if they had been appointed by the Ministry of Magic. This was the case with the Care of Magical Creatures Professor from 1993-1997, Rubeus Hagrid. He was expelled from Hogwarts before being able to complete any 'important' exams, however Hagrid was considered more than qualified on the subject matter. Another example was Firenze, who, as a non-wizard, had not previously attended Hogwarts.