Multiple news outlets report Quentin Wright, a 25-year-old math teacher at The Champion School in Stone Mountain, was taken into custody Tuesday. He has been charged with four misdemeanor counts of contributing to the delinquency of a minor.
An arrest warrant says Wright arranged times with students when the classroom would be empty and gave them condoms.
The investigation began after a mother said she found text messages between Wright and her 14-year-old son.
"I was in a state of disbelief when I read all these messages," the parent told ABC affiliate WSB-TV. "Basically, he's allowing the students to have sex in a storage room in his classroom."
A DeKalb County Schools spokesman says they are cooperating with the District Attorney's Office and Wright has been removed from the classroom.
"It's very sickening and disheartening because we trust administrators and educators when we drop our kids off at school," the mother said.
It is unclear if he has a lawyer.
The Associated Press contributed to this report.