Parents Louis and Kesha Bell say they've been talking to officials at North Highland Math and Science Academy and Oklahoma City district administrators to no avail since December about verbal abuse of children.
The alleged abuse has caused tears and nightmares for two of their children, the parents said.
The couple appealed again to school board members at Monday's meeting to stop what they say amounts to deprivation of children's needs.
School district spokeswoman Kathleen Kennedy said the district is investigating.
"We listen to everybody's concerns, and these are one set of parents out of 40,000 children within our district,” Kennedy said. "And we're sorry that we can't meet the needs of every parent but we are trying as hard as we can to make sure that we are listening to those parents and listening to their concerns.”
Acting Superintendent Sandra Park declined, through Kennedy, to speak directly to the issue.
To help make their case, the Bells began sending their children to the northwest Oklahoma City school with audio recorders, which they provided to The Oklahoman
The recordings largely document mundane school day activities, like children reading aloud and learning to round numbers. In some places, teachers can be heard praising children's behavior and encouraging them to do well on next week's state exams.
But other things children have heard from their teachers include:
"Shut up! Shut up!”
"Y'all are rattling like wild animals!”
"You done lost your mind!”
Kesha Bell said such outbursts affect "their education because it messes with their emotions.”
The Bells did not get a chance to speak publicly at the meeting because the sign-up deadline was moved a half-hour earlier than at previous board meetings, which they did not know.