Police cordoned off Jackey Maarohanye's house in Naturena, Johannesburg, and searched the premises of the controversial Ithuteng Trust's head on Friday evening.
The officers arrived shortly after a group of teenagers got out of the school's minibus at Maarohanye's home. Minutes later a car dropped off more people.
Soon thereafter a police sedan and a van stopped outside the home. Two officers from the van stormed into the yard with drawn weapons.
One officer was armed with a rifle and his colleague carried a pistol.
They emerged minutes later escorting a group of teenagers.
A Sowetan photographer later saw an officer taking statements from pupils.
Maarohanye stood outside on the pavement while the police surveyed the premises. Her son Molemo "Jub Jub" Maarohanye accompanied the officers inside.
Police were evasive when asked to comment on the incident.
Captain Bhekizizwe Mavundla said he did not know which police station the officers were from.
He said that police patrolling Naturena did not know about the incident.
Maarohanye was arrested with 70 of her pupils earlier this year after she allegedly kidnapped and assaulted Sowetan reporter Vusi Ndlovu.
She and three of her assistants are still on trial over that incident.
Maarohanye and two assistants are also on trial for assault and kidnapping in a separate case.