Gauteng police says the teacher will be back in court in November.
"He is going to appear in court again on November 6 2013," said Warrant Officer Moses Maphakela.
The appearance would take place at the Alexandra Magistrate's Court. The teacher was arrested in August.
EyeWitness News reported earlier on Monday that the teacher was out on bail after the mother laid criminal charges against him.
The Gauteng education department reportedly said an independent investigation had been launched into the school and the district office's handling of the case.
"The teacher is suspended and we have put in place an independent investigation that will cover all circumstances regarding this case," spokesperson Gershwin Chuenyane was quoted as saying.
"The department will be guided by the outcome of the investigation on what action to take."
According to the report, on July 30 the teacher engaged in a late-night WhatsApp chat with the boy's mother, thinking it was him.
The teacher allegedly sent numerous sexual images and made sexual suggestions.
The mother saw an image of a man sitting naked in a bathtub appear on the screen of her son's cellphone, it was reported.
She has not been named to protect her son's identity. The mother went to the national education department. She said it took over a week for the teacher to be suspended. – Sapa