A North Penn High School student was arrested Wednesday morning for assaulting a teacher in a classroom. Towamencin Township Police say the 16-year-old North Wales boy got into a dispute with the teacher when he failed to put away a food item and give it to the teacher along with a book bag.  They say he shoved the teacher and knocked a computer to the floor.  He is charged with aggravated assault, criminal mischief and other offenses.