Classes appear to be vital to success in Hogwarts Legacy. They are how the main character learns the spells and recipes required to participate in combat, solve puzzles, and function. The following is a list of classes in the game.
Alchemy
Instructor: Unconfirmed
Classroom Location: Unknown
This class was confirmed during the AutoDesk event on August 3rd, 2022.
Ancient Runes
Instructor: Unconfirmed
Classroom Location: Unknown
This class, while part of the Harry Potter canon, is unconfirmed for Hogwarts Legacy. During the original announce trailer, there are multiple instances of the main character running into runic symbols while out in the world. There is a symbol on the wall that pulls the main character in and one on either side of the bridge which rebuilds itself. It is possible that this class was lumped into either "History of Magic" or "Magical Theory".
Apparition
Instructor: Unconfirmed
Fee: 12G
Classroom Location: Great Hall
This class, while part of the Harry Potter canon, is unconfirmed for Hogwarts Legacy.
The ability to teleport from one location to another was exceedingly dangerous and required hard study to achieve. In addition, the Ministry of Magic required licensing and a minimum age of 18. While the grounds of Hogwarts had magical protections to prevent apparition, the Great Hall has the ability to remove those restrictions for the purposes of this class.
Arithmancy
Instructor: Unconfirmed
Classroom Location: Unknown
This class, while part of the Harry Potter canon, is unconfirmed for Hogwarts Legacy.
Astronomy
Instructor: Satyavati Shah
Classroom Location: Top floor of the Astronomy tower, south side of west complex
This class has been confirmed--appearing in some of the filenames during the AutoDesk event on August 3rd, 2022 and the professor was confirmed as part of the voice-over recognition tweets from January 11, 2023. It can also be assumed that this class will be held in the astronomy tower, as what other class would be held in the astronomy tower if it wasn't this one, right? Right.
Beast Class
Instructor: Bai Howin
Classroom Location: hut just south of quad-fountain area adjacent the Quidditch stadium
During the gameplay reveal trailer, the narrator confirms "Beast Class". While that is not its official title during Harry Potter's time, that was the name in 1890. We certainly saw plenty of magical creatures in that same trailer, including (but not limited to) mooncalves and thestrals. During the second gameplay showcase, the tour brought us into a populated vivarium, which also included a graphorn and a kneazle.
The classroom for Beast Class is one of the few classrooms to be found on the exterior of the school--under an open pavilion near what will someday be known as "Hagrid's Hut".
Broom-riding
Instructor: Chiyo Kogawa
Classroom Location: outdoors in various locations
We see the broom-riding instructor twice during the gameplay reveal trailer--once on a broom during class and then again seated at the table behind Headmaster Black during the sorting ceremony. While the devs have confirmed that playable-Quidditch is NOT currently in the game, the proprietor of the Quality Quidditch Supplies shop appears to take a shine to the main character and agrees to let that character use his brooms to traverse the world. Hopefully this is after the professor teaches you how not to die on one.
This class is one of the few that are taught outdoors for obvious reasons. Professor Kogawa often sets up floating rings through which students must fly in order to improve or maintain their grade.
Charms
Instructor: Abraham Ronen
Classroom Location: South wall of west complex, two floors above DADA
By the most basic definition, charms are spells. We see spellcasting throughout the entirety of the gameplay reveal trailer and the narrator specifically confirms this class will be in the game. Creative director Alan Tew has confirmed that there are "over 20 spells" in the game and the blurred shot of the spells menu we got in the second gameplay showcase just before the Dark Arts arena content had 26 boxes.
Defence Against the Dark Arts (DADA)
Instructor: Dinah Hecat
Classroom Location: South wall of west complex, two floors below Charms
Two duels take place during the March 2022 gameplay reveal trailer inside of the DADA classroom. In addition, we visited the classroom during the first gameplay showcase during Andrew's tour of the castle.
Divination
Instructor: Mudiwa Onai
Classroom Location: Unknown
This class has been confirmed, as a special animation was published on Thursday, August 4th, 2022 by the official Hogwarts Legacy account identifying the "Divination Tower". This combined with an earlier animation showing the "North Tower" and several centaurs--who are known for their divination skills--has illustrated just how important the art of divination could be to the game.
Herbology
Instructor: Mirabel Garlick
Classroom Location: Greenhouse complex
This class was confirmed throughout the gameplay reveal trailer. Not only do we see the instructor during an active class and the main character entering Room II in the greenhouse, but we also see multiple instances of the user deploying minions such as mandrakes and chomping cabbages. Herbology pairs nicely with potions class as the former can supply the latter with plant-based ingredients.
History of Magic
Instructor: Cuthbert Binns
Classroom Location: west complex, west wall near the entrance from the quad
In the gameplay reveal trailer, we actually see Professor Binns teaching the class. Thus it is confirmed. History class covers many subjects in the Harry Potter lore. However, one particularly interesting aspect of this class is the focus on previous goblin uprisings. This may come in handy given we are investigating a goblin uprising in this game.
During the August 3rd 2022 AutoDesk event, several angles of the History classroom appeared in the background footage. By analyzing the position of the stained glass windows, we can determine that the classroom is located on the ground floor immediately next to the main quad area. One of the stained-glass windows of the classroom is of "Merlin", a famous former student.
Magical Theory
Instructor: Eleazar Fig
Classroom Location: DADA Tower, upper floor, near girls' lavatory
While we are unsure of what exactly this class would be about, it has been confirmed via tweet on January 16, 2023 that Professor Fig will be in charge of this class--though it has few actual in-class meetings due to the professors extracurricular activities. It would appear that this guy is basically Indiana Jones.
Muggle Studies
Instructor: Unconfirmed
Classroom Location: Unknown
This class, while part of the Harry Potter canon, is unconfirmed for Hogwarts Legacy.
Potions
Instructor: Aesop Sharp
Classroom Location: Unknown
This class was confirmed during the gameplay trailer and would blend well with the herbology class that was also confirmed. Crafting potions appears to be a key mechanic in the game. Not only will you be able to craft potions for your own use, but you can also sell potions to one of the merchants at Hogsmeade.
Transfiguration
Instructor: Matilda Weasley
Classroom Location: Unknown, though immediately adjacent to the Transfiguration courtyard
While it has not been confirmed that you can actually attend this class in-game, Deputy-headmistress Matlida Weasley has been identified as the transfiguration professor. How she maintains such a schedule in between handing shockingly-dangerous books to her students is beyond me.