Schools had been closed in March following the introduction of a national lockdown.
They then reopened on June 8 only to be met with increasing cases of learners, teachers and school staff testing positive for Covid-19.
This led to more than 150 schools being forced to close for decontamination.
South Africa will be shutting down all public schools for four weeks as the country continues to battle against the coronavirus spread.
President Cyril Ramaphosa, in a televised speech on Thursday, said the country will close learning institutions to help tame the rising number of infections that have placed the country as the fifth most affected in the world.