But police in Tennessee say this man was caught on school property giving a different kind of lesson.
Daniel Torroll, 56, was allegedly found naked under a bridge within sight of the Allendale Elementary School in Spring Hill, Tenn., doing the nasty with what WATE-TV described as "a child-like doll" with holes cut into it.
Torroll, who gives private lessons (umm...) and doesn't teach at the school says the whole thing was an accident.
"I happened to be there I didn't know it was school property. I wouldn't be there if I knew it was school property," he was quoted as saying.
He also blamed the urge to have sex with dolls on an ADHD impulse... and said he's not into children and has two himself (again: umm...).