A Long Island prep-school teacher allegedly raped a student at his school for years beginning when she was 14 years old, officials said Friday.

Daniel McMenamin, 33, was sexually involved with the teen starting in November 2014 until July 2017 while he was a teacher at the private Lawrence Woodmere Academy and she was a student there, the Nassau County Police Department said.

The creepy teacher was hit with a hefty slew of charges, including three counts of second-degree rape, 24 counts of third-degree rape, 24 counts of third-degree criminal sexual act and endangering the welfare of a child, cops said.

McMenamin was arraigned in Nassau First District Court Friday and held on $280,000 bond, Newsday reported.

He pleaded not guilty to all charges and is due back in court Tuesday.

The judge also ordered him to stay away from the teen.