<p>What I’ve learned about TV and film acting is that actors are trained on the stage, because if you can act for two hours live on stage than you can definitely act for the brief time periods needed for film/TV. Most acting schools do teach a class or two senior year on the subtle differences needed to act for TV/film.
What I’ve gathered from my D who has had movement, voice and acting classes is that acting class would be one where you are working on an actual piece like a monologue, scene or show. Movement class is study in the techniques actors use to improve their movement on stage and connecting their bodies to what they are saying. They might do monos and scenes in movement class too, or they might work on specific types of movement like “drunk work” or movement from a time period. (Characters from the 1800’s move differently than a modern character.)
Voice class is techniques on projection, diction and clarity and is sometimes called speech.
These are very general descriptions and I’m sure my D would shudder in horror at my ignorance. But these descriptions have helped other non-actors who have asked me what my D does in all her acting classes and what she will do in college!</p>