Her name is not Sharon, this porn video isn't her first one and she's not a teacher. She coud have answered: "I don't need a job, I already have my ass". Over 250 videos only on Xh, that's pretty impressive for a teacher. Her students don't have internet access? Maybe they're all blind.
That said, yes she's hot, yes she's a very good fuck, yes she has a gorgeous pussy and a majestic ass. And yes, these are quite important criteria when you make a living from prostitution and porn. Making porn when you're a teacher is probably the worst decision you could make in your entire life.