In a disconcerting incident at a private school in Dugawar village, Sambhal district, a school teacher, identified as Shaista, was arrested on Thursday for allegedly instigating communal discord. The incident unfolded when the teacher purportedly directed a Muslim student to slap a Hindu classmate who was unable to answer a question. The arrest followed a complaint filed by the father of the Hindu student, who accused the teacher of violating his son's religious sentiments.