The accused teacher has been arrested and sent to police custody for raping the student, they said.
The incident came to light when the girl's mother took her to a doctor as she was unwell after consuming a medicine which the accused had given to abort her pregnancy, police said.
SSP Rakesh Singh said the girl is a student at a private coaching center in Dwarikesh colony here and was run by accused Sachin Chaudhary, a resident of Nasiti village.
The girl has been admitted to district hospital, police said, adding an FIR has been filed by the girl's mother.
The SSP has asked Additional Superintendent of Police Preeti Priyadarshini to conduct a probe into the matter.