34-year-old Elsa Cruz of Hamilton, N.J. was cited for careless driving and driving without a license.
The accident happened around 9:30 a.m. in the 1300 block of Whitehouse-Mercerville Road in Hamilton Township, Mercer County.
Police say Cruz was trying to park her 1997 Honda CRV when she hit the accelerator instead of the brake.
The SUV hit a steel pole barrier and crashed through a classroom window, coming to rest about a foot inside the building.
19 children and four staff members were in the room at the time, but no one was hurt.
Cruz also escaped serious injury.
The Hamilton Building Inspector has deemed the building safe for occupation.
