A teacher shocked pupils when she showed the class a homemade sex tape featuring herself by mistake.
The unnamed teacher said the accident happened when the video got mixed up in her lesson plan.
The woman quickly admitted the faux pas to officials at Forest Heights Middle School and later in the day called the parents of all the pupils - aged 12-13 - to apologise.
Many parents are however unhappy with a perceived lack of action that has been taken by the school district authorities in Little Rock, Arkansas since the incident on Wednesday.
Nicholas Tolerson, whose son was in the class, said although he has sympathy for the "apologetic" teacher, he wants accountability.