

Uniform:
The students at Hogwarts School of Witchcraft and Wizardry are required to wear a uniform. Students must wear their uniforms during all lessons, and while eating meals or studying in the Great Hall. Students are allowed to wear their own clothes after lessons in their House dormitory and during the holidays. Most students are seen still wearing their uniforms in their House dormitory, most probably because they would need to change into their pajamas to sleep before they go to bed, so they may feel that it is troublesome to change into their own clothes, then change again into their pajamas.
The Hogwarts uniform consists of a white collared, long sleeved shirt, a tie of their house colours (getting more sophisticated each year), a grey jumper vest, black slacks for males and a black, knee length skirt for females paired with black or grey socks. Both genders wear black comfortable shoes. Each student wears a cloak that bears their house crest on the front, right side and has lining of their house colour: green for Slytherin, red for Gryffindor, blue for Ravenclaw, and yellow for Hufflepuff. During the winter months, a grey jumper replaces the jumper vest for comfort and a scarf bearing their two house colours is worn for warmth. A black pointed hat is provided, but is only worn for special occasions such as the opening ceremony, special dinners, house cup ceremony etc.
Subjects:
There are a variety of classes taught at Hogwarts School of Witchcraft and Wizardry. These include both the core curriculum and the electives, available from third year forward. Some classes may be dropped in sixth year.
Grading:
Grading on routine homework seems to be along the same lines as that for Muggle students. Hogwarts students also have difficult exams as they progress higher in the system. O.W.L.s, or Ordinary Wizarding Levels, are a set of standardised tests for fifth year students which determine what courses a student may continue to study in their final years at Hogwarts. N.E.W.T.s(Nastily Exhausting Wizarding Tests) are optional levels of education for exceptional students, much like A levels for Muggle students. To progress to N.E.W.T. level, students must receive certain high marks on O.W.L. exams. N.E.W.T tests occur at the end of the seventh year and cannot be retaken.
Ordinary Wizarding Level Grading System
This grading system is also used on W.O.M.B.A.T.s (optional tests taken outside Hogwarts) and it is most likely used on N.E.W.T.s also. (Making this the universal exam grading system in wizarding Britain.)
Hogwarts Grounds:
Hogwarts is a large castle, located on extensive grounds that include the Quidditch pitch, the Forbidden Forest, and the Hogwarts Lake. The three highest towers are the Astronomy Tower, Ravenclaw Tower, and Gryffindor Tower. There are 142 staircases in the massive castle, which is set upon huge rocks above a magnificent loch (lake). The grounds are protected by various defensive magic including the spell which prevents Muggles from seeing and entering the school. The castle is known for its many updates and changes in layout throughout the years, such as regenerating itself after the Battle of Hogwarts. Albus Dumbledore once stated that he did not know all of Hogwarts’ secrets, as the castle contains extreme amounts of ancient magic and history.
Qudditich
Tryouts for House Quidditch teams happen at the very beginning of the school year. First-years are usually prohibited from joining a Quidditch team, as they are usually inexperienced with brooms and are forbidden to own them in the first place, however exceptions have been made on both counts.