“It’s an F-U,” a friend of Rosenfeld said of his refusal to quit.

“He’s happy about it, and very proud that he beat the system. This is a great show-up-but-don’t-do-anything job.”

Accused in 2001 of making lewd comments and ogling eighth-grade girls’ butts at IS 347 in Queens, Rosenfeld was slapped with a week off without pay after the DOE failed to produce enough witnesses at a hearing.

But instead of returning Rosenfeld to the classroom, the DOE kept him in one of its notorious “rubber rooms,” where teachers in misconduct cases sat idle or napped. As The Post reported, Rosenfeld kept busy managing his many investment properties and working on his law practice. He’s a licensed attorney and real-estate broker.