In drama study, the curriculum covers theater history and technique, and uses theater games, skits, and improvisation along with puppets, props, and costumes. The Lower School Drama program features a fully staged Spring Musical Play in which all students have a vital part of the production. Middle School stages its own spring musical, and Upper School students may audition for two productions each year – a dramatic play in the fall and a musical in the spring.

In addition to providing opportunities for students to perform on stage, school productions allow students to sharpen their backstage skills in set design, stage management, lighting and costume design.

International Thespian Society Chapter #630 recognizes annually those Upper School students who have devoted many hours and much effort to making Ranney's theatrical productions shine. “Coffeehouses” in fall and spring provide a less formal venue for Middle and Upper School performers to try out skits, monologues, musical numbers or their most creative stand-up act.