There are three different kinds of classes you can visit to learn the principles of magic. They will teach you some exclusive spells and are needed in order to understand and learn other spells.
Classes always take place Monday to Friday in the morning and the afternoon (you can see them in the events tab when changing location).
Enchantment is a school of magic that imbues items with magical properties. Enchantment spells can turn mundane items into powerful artifacts, and each level of the skill slightly improves the quality of enchants you make using spells and talismans. An expert in the school can imbue items with hidden hexes.
Enchantment classes are held by Merril and take place in the workshop and only offer a beginner course at the moment. There you will learn to cast Enchant Item and the ability to imbue items with enchantments.
Mind alteration is a school of magic that focuses on altering and controlling minds. Mind alteration spells can be used heal, harm, enhance, and reduce character's mind.
Mind alteration classes are held by Lacy and take place in the auditorium and only offer a beginner course at the moment. There you will learn to cast Sap Mind and gain the ability to learn and cast mind spells (which don't exist yet).
Transfiguration is a school of magic that focuses on altering the form and appearance of objects and creatures. Transfiguration spells can be used to heal, harm, enhance and reduce character's body.
Transfiguration classes are held by Chloe and take place in the gym and comprise a beginner and an intermediate course.
The beginner course will teach you Sap Body and the ability to learn and cast body spells.
The intermediate course will teach you the Polymorph spell.
If you appear tired (not having any Spell Points) to a class, a special scene will trigger. For more info, see Encounters.