The woman pleaded guilty last week to having abused her position when she seduced the boy in a cabin near Sarpsborg in June 2011, newspaper Sarpsborg Arbeiderblad reports.
During the trial the boy, now aged 17, told Sarpsborg district court how he felt his teacher, who was 29 at the time, had begun to fall in love with him.
The pair ended up sharing a cabin during a class trip. According to the boy, the teacher asked him if he would like to have sex with her. He said he lay awake all night thinking about the offer before giving his assent the next morning.
Afterwards, the boy said he felt let down by his teacher and had trouble sleeping.
The woman admitted to the court that she was smitten by the boy. While she said she was not sure which of them had taken most of the initiative in the cabin, she said she took full responsibility for what had happened.
“As an adult I should have stopped it, but I didn’t,” she said.
The verdict was in line with the prosecutor’s recommendation.
In addition to her jail sentence, the woman was also barred from teaching for five years and was ordered to pay the boy 35,000 kroner ($6,000) in damages.
Local authorities first reported the teacher after rumours began circulating around the school and on Facebook.
The teacher did not return to work after the 2011 summer holidays.