In Ontario, you must spend five years as a teacher before you can even start taking the courses to become a principal. You have to be qualified in all four divisions (primary, junior, intermediate, and senior) and experienced in three, you must have a speciality in one subject area (that's three additional qualification courses in one subject area) and your special education qualifications. It's slightly more work than the average master's degree in education.

Which makes one wonder how they manage to get so many total morons as principals.

And thank you. :)