Uploaded by someguy845 
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Description
It’s pretty uncommon to have your high school principal fill in as a substitute teacher. It’s even less common to have your principal look as good as Tia. :)
Source
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Well, in every school I went to, the principals were also regular teachers. In elementary school, the principal taught my class history; in high school, we’ve had biology with the vice principal. So it’s a bit less uncommon than OP seems to think. :3