The 68-year-old teacher, Joseph Mingoia, of Bayonne, was arrested days after trying to break up a student fight, during which he allegedly struck a female teen.
A Montague woman is charged with aggravated assault, while three men face disorderly conduct after an adult fight at a youth tournament in Warren County.
Kurt Zimmermann was band director for the Westwood Regional School District. He faces several charges, in connection with sexual contact that police say happened years earlier.