The 15-year-old boy reportedly threatened to kill the teacher after an argument had ensued between the two in class.
The deceased teacher identified as 26-year-old Njomi Tchakounte Boris Kevin had tried to discipline the pupil after noticing during while teaching that he was not paying attention.
The boy then grew rebellious and what was meant to be a disciplinary action turned bloody as the pupil reportedly pulled out a compass from his uniform and stabbed the teacher.
The poor teacher was rushed to a nearby hospital for treatment but he did not survive.
The youngster is reportedly in police custody assisting with the investigation.