A teacher working at the school where US President Barack Obama's children -- Sasha and Malia -- study has been accused of child abuse.

Robert Peterson, who taught seventh and eighth grades at the private DC-area school, Sidwell Friends, has been charged with sex abuse of a minor and a fourth-degree sex offense.

Peterson frequently invited a male student to his home, made him watch pornography and touched him inappropriately, reports CBS News.

The school dismissed Peterson on January 14.

Also, he faces charges in Queen Anne's County, where he was director of the Sidwell Friends' summer camp.