An elementary school principal in Florida allegedly stole $900 from a mentally disabled student who brought his parents’ cash to school, authorities said.

Edward John Abernathy, 50, of Land O’ Lakes, was arrested Thursday after deputies from the Pasco County Sheriff’s Office said he stole the cash from a 9-year-old mentally disabled student at Connerton Elementary School, the Tampa Bay Times reports.

Abernathy allegedly took the money after the student brought $2,100 of his parents’ money to school on Oct. 23. Teachers at the school then took the cash after realizing what the boy brought in and locked it away in the principal’s office.

A subsequent investigation revealed that Abernathy only returned $1,200 when the boy’s mother later went to the school to retrieve the money, deputies said.

Trevor Roppolo, a spokesman for Pasco County Schools, said Abernathy — who has been charged with grand theft — had been placed on paid administrative leave following his arrest. He has been employed by the district since 1992, Roppolo said.

“Getting the news … obviously we were shocked to hear about it,” Roppolo told The Post of the allegations. “We’re disappointed and shocked. It’s quite the way to end the week.”