Wizards learn the secrets of arcane magic as an academic discipline. These studies range from individual master and apprentice arrangements, the current court wizard of Pegbarrow has several apprentices for example. Large institutions teach magic along with a formal education in a variety of other areas such as grammar, logic, and rhetoric.
Formal schools range from small groups of perhaps of two dozen students and a few teachers, to Caedwalla the pre-eminent school of the arcane in the known world which has no less then two thousand students and one-hundred fifty teachers. No matter how wizards are trained their approach to magic is one that can be studied and understood through academic discipline.