Police spokesman Thulani Zwane confirmed that a case of assault was opened last month at the Nsikeni police station in Umzimkulu, The Witness reported.
It was not clear when the teachers would appear in court.
The teenager said that in January he had received 12 lashes on his buttocks and three on his hand. He woke up that night with pain in his genitals.
A doctor later found blood clots blocking his circulation and he had needed surgery. He had lost sensation in one of his testicles.
The boy said he was not angry or surprised as physical punishment was a normal practice at his school.
Provincial education MEC Senzo Mchunu said he was aware corporal punishment was still happening, but that teachers who did this, did so at their own risk.
The SA Democratic Teachers’ Union (Sadtu) said the teachers had since resigned. They were not members of the union.
Said regional secretary Lindani Mkhize: “As Sadtu, we disagree with corporal punishment as it is against the law”.