A teacher of a government school in Nangloi, Delhi was stabbed to death by two Class 12 students in front of their classmates on Monday.br br The horrific crime incident took place when the students were writing their exam at the Government Senior Secondary School.br br Reports said that one of accused students was rusticated for low attendance. He went to the school to speak with the victim.br br During conversation, he and his friend, reportedly lost temper and stabbed him.