At first glance, a Thursday stroll across Justin-Siena High School was like any other weekday on campus. Teenagers walked from class to class, waited in a cafeteria line, or seated themselves at outdoor tables in the sunlit plaza intently following their friends’ chitchatting.

Only one thing was missing for some of the students: speech.

They were members of the Justin-Siena drama club, turning down the volume for the school Mime-A-Thon. For most of the school day they would communicate only with facial expressions, eye movements and hand gestures, going wordless in exchange for donations to fund a March musical production of “Guys and Dolls” in which they would star.