Thirty-two children, aged between five and 15, were injured when the school bus they were travelling in overturned in Krugersdorp on Tuesday, paramedics said.
The children were flung around the bus as it overturned, ER24 spokeswoman Vanessa Jackson said.
"All of the children managed to free themselves from the wreckage or were assisted by their friends and fellow learners to climb out."
Eight children had moderate injuries while the remaining 24 had minor injuries, Jackson said.
The bus driver also had minor injuries.
No other vehicles were involved in the accident.