In-Character:

+ Punctuality: Be on time, because the class will not wait on you before starting. Late arrivals will result in points loss from their house.
+ Attire: School uniform-wear is optional here unless stated otherwise in the notice.
+ Respect: Not only for the animals, but for everyone around you. If you don't want any trouble, then don't bring it.

Out-of-Character:

+ If class has already started, don't post announcing your arrival. Simply pretend your character has been there all along to avoid point deductions in your post.
+ Plagarism (word-for-word answers / homework) is not accepted. Always make the effort in putting the answer(s) in your own character's words (no matter how creative they come across).
+ Don't stress on if you make any mistakes or feel left behind in the lesson. It's better to earn some points with one or two posts than not bothering at all. So get in there and have some RP fun!