A teacher...who is cool. They motivate their students to learn (possibly in "fun ways" that actually are fun), laugh at the Stern Teacher and Misplaced Kindergarten Teacher behind their backs, protect their students from the Sadist Teacher and oppose the Evil Teacher and Dean Bitterman at every turn. Their consistently good results might protect them from being a Fired Teacher, but this isn't a given. A lot of these end up being a Mentor Archetype either way.